Observation of neutrinoless double-beta decay (0$\nu\beta^{-}\beta^{-}$) would establish that neutrinos are Majorana particles (indistinguishable from their antiparticles) [1]. In spite of the formidable experimental challenges, it is an experimentally sensitive avenue to provide direct information on neutrino masses. The current work [2] would explore the required sensitivity for the upcoming...
Identification of electron neutrino interactions in liquid argon time projection chambers is essential to seeking answers to questions of the fundamental nature of neutrinos. These analyses include determining the ordering of the mass states and the value of the CP-violating phase in the neutrino sector in the Deep Underground Neutrino Experiment (DUNE), and performing neutrino oscillation...
In many rare event searches noble gases are deployed as detector target. In order to achieve higher sensitivities, purification systems ensure a low number of impurities by continuous circulating. To pump and compress xenon gas through such systems an ultra-clean, hermetically sealed, radon-free pump without oil lubrication is indispensable. Considering that the detectors of low background...
An ongoing analysis in IceCube regarding high-energy sterile neutrino oscillations is discussed. Matter-enhanced resonances for eV-scale sterile neutrinos with non-zero $\theta_{24}$ and $\theta_{34}$ lead to a strong enhancement of cascade-like event signatures through $\nu_{\mu}\to\nu_{s}\to\nu_{\tau}$ oscillations and allow for a direct $\nu_{\tau}$ appearance probe. Similar channels also...
We reconsider kinetically mixed dark photons as an explanation of the $(g-2)_\mu$ anomaly. While fully visible and invisible dark photon decays are excluded, a semi-visible solution can still explain the discrepancy. We explicitly re-evaluate the constraints from B-factories and fixed-target experiments, namely BaBar and NA64, pointing to a solution in terms of dark sector models with dark...
The Jiangmen Underground Neutrino Observation (JUNO) experiment is designed to measure the neutrino mass order (NMO), one of the biggest remaining puzzles in neutrino physics. Regarding the sensitivity of JUNO’s NMO measurement, besides the precise measurement of reactor neutrino‘s energy spectrum as the primary source, the independent measurement of atmospheric neutrino oscillation has a...
Neutrino mass ordering (NMO) is one of the biggest remaining problems in particle physics. The Jiangmen Underground Neutrino Observatory (JUNO) is designed to solve this problem with a 20-kton liquid scintillator detector. Atmospheric neutrino oscillation measurement in JUNO offers independent sensitivity to NMO via matter effect, complimentary to its reactor neutrino measurement, which can...
The nuclear isomer $^\textrm{83m}$Kr is used at many experiments for calibrations. At the neutrino mass experiment KATRIN, monoenergetic conversion electrons from the 32.2-keV transition of $^\textrm{83m}$Kr are regularly used to investigate inhomogeneities in the electric potential inside the tritium source and to calibrate the energy scale. The absolute precision of this energy scale is...
[Based on Phys.Rev. D100 (2019) no.3, 035009 by Soumita Pramanick]
In this scotogenic model based on $S3\times Z_2$ symmetry realistic neutrino mixing is obtained at one loop level.
In this model, two right-handed neutrinos are present. These two right-handed neutrinos
when are maximally mixed, one gets the form of the left-handed Majorana neutrino mass matrix
corresponding to...
We propose a new approach to explore the neutral-current non-standard neutrino interactions (NSI) in atmospheric neutrino experiments using oscillation dips and valleys in reconstructed muon observables, at a detector like ICAL that can identify the muon charge. We focus on the flavor-changing NSI parameter $\varepsilon_{\mu\tau}$, which has the maximum impact on the muon survival probability...
Based on the IsoDAR 60 MeV/amu compact cyclotron design, which introduces several novel ideas for this type of particle accelerator, we describe a new family of high-current cyclotrons with energy from 1 to 60 MeV as a tool for particle physics, isotope production, and other uses. The design is modular, with design features upstream of 1 MeV identical for any energy and easily customized...
Photomultiplier tubes (PMTs) are widely used in scintillation and Cherenkov detectors for their great performances on photon detection. For example, the Jiangmen Underground Neutrino Observatory (JUNO) will use 17,612 20-inch PMTs in its central detector to achieve an unprecedented energy resolution of 3%/√𝐸. It’s critical to construct a reliable and accurate optical model to describe the...
An accurate atmospheric neutrino flux is crucial for a multitude of physics studies with the modern neutrino telescopes; as a signal for neutrino oscillation measurements, and as a background for searches of astrophysical neutrino sources. For precision calculations at energies below a few GeV, which are within reach of the IceCube Upgrade and KM3NeT-ORCA, the lateral component of hadronic...
We continue our discussions [1-5] about the electromagnetic properties of neutrinos and present an updated review on this topic. We start with a short introduction to the derivation of the general structure of the electromagnetic form factors of Dirac and Majorana neutrinos.
Then we consider experimental constraints on neutrino magnetic and electric dipole moments, electric millicharge,...
We discuss a new experiment based on the proposal [1] to observe for the first time the coherent elastic neutrino-atom scattering (CEνAS), using electron antineutrinos from tritium decay and a liquid He-4 target, and also to search neutrino electromagnetic properties [2,3], including the neutrino magnetic moment. The experiment is under preparation within the research program of the National...
BGO scintillator is widely used in particle physics experiments. It is also used in Super-Kamiokande to evaluate the efficiency of neutron tagging which can select electron antineutrino events via inverse beta decay process. A relative 10% discrepancy between the measured and simulated efficiency of neutron tagging was reported as systematic errors. A precise measurement of responses of the...
Icecube neutrino detector in last decade recorded an abundant noisy atmospheric rain of upward, contained, muon track neutrinos, up to TeVs energy. Their overabundance over electron atmospheric showers or cascade ones, had been well tested. Above tens TeV energy, the sudden overcome of shower or cascades rain, even within PeV energy (2013), the high energy starting events, HESE, more abundant...
Massive and deep underground detectors such as the future Deep Underground Neutrino Experiment (DUNE) will offer a unique opportunity to search for rare, beyond-Standard Model (BSM) physics signals. One such BSM process is nucleus-bound neutron-antineutron oscillation—a baryon number violating process that produces a unique, star-like topological signature that should be easily recognizable...
On 1987 February 23rd, neutrinos from SN1987A were observed. This observation confirms that neutrinos have an important role in supernova explosions. In order to establish the detailed mechanisms of supernovae, further supernova neutrino signals have been searched for with a variety of detectors. The KamLAND, an anti-neutrino detector using a 1kt liquid scintillator, has significant...
There have been enormous improvements in event reconstruction and signal identification for neutrino experiments via deep learning methods in recent years. Although these venues reach a considerable accuracy, they are also very time- and power-consuming. This poster presents the first attempt at accelerating deep learning methods for muon event energy and zenith reconstruction on Tensor...
Located at the ILL research facility (Grenoble, France), STEREO detects antineutrinos produced by fissions within the ILL’s reactor core. Because the reactor fuel is highly enriched in 235U, the antineutrino flux almost entirely originates from this one isotope, allowing a complete study of the 235U-induced antineutrino spectrum.
In the poster we will present an...
Beyond the Standard Model processes at neutrino experiments have largely been unexplored due to the current effort required to implement these models into existing event generators. In this poster, I discuss the ongoing work within the Achilles event generator to automate this process. BSM effects are expected to first appear in the leptonic current. In Achilles, the cross section is...
This poster will describe the model for the intranuclear cascade (INC) used in Achilles, a new event generator for lepton-nucleus scattering. The INC model takes as input quantum Monte Carlo nuclear configurations and uses a semi-classical, impact-parameter based algorithm to model the propagation of protons and neutrons in the nuclear medium. The influence of in-medium effects will also be presented.
The existence of cosmic accelerators able to emit charged particles up to EeV energies has been confirmed by the observations made in the last years by experiments such as Auger and Telescope Array. The interaction of such energetic cosmic-rays with gas or low energy photons, surrounding the astrophysical sources or present in the intergalactic medium, guarantee an ultra-high-energy neutrino...
Several anomalies over the last two decades point towards the existence of eV-scale sterile neutrino. In this work, we study the physics potential of two proposed long-baseline experimental set-ups in the presence of a light sterile neutrino, over a wide range of $\Delta m^2_{41}$ from $10^{-5}$ eV$^{2}$ to 10$^2$ eV$^2$. The first set-up consists of two Far Detectors (FD), namely Japanese...
During the modern era of high precision neutrino physics measurements it has become increasingly important to deepen our understanding
of detector performance. It is common for neutrino detector systems to
be fully or partially composed of polystyrene-based scintillator bars, and
most experiments now gather data for over a decade. Therefore it is crucial to investigate how the performance...
Supernova (SN) explosions are the most powerful cosmic factories of all-flavors, MeV-scale, neutrinos. The presence of a sharp time structure during a first emission phase, the so-called neutronization burst in the electron neutrino flavor time distribution, makes this channel a very powerful one. Large liquid argon underground detectors, like the future Deep Underground Neutrino Experiment...
The KATRIN experiment aims to measure the neutrino mass via precision spectroscopy of the kinetic energy spectrum of tritium beta-decay with a target sensitivity of 0.2 eV/c² at 90% C.L. A high intensity windowless gaseous tritium source is used in conjunction with a high-resolution spectrometer applying the magnetic adiabatic collimation (MAC-E filter) technique to scan the beta-decay...
We find compact analytical expressions for neutrino oscillation probabilities, with invisible neutrino decay and matter effects included in 2-flavor and 3-flavor formalisms. The decay may be represented by an effective Hamiltonian which is non-Hermitian. The Hermitian and the anti-Hermitian components of this Hamiltonian need not commute; in the presence of matter, these components invariably...
This poster will present the sensitivity towards the detection of low-energy antineutrinos of the Theia detector. For the purposes of this study, we consider one of the possible proposed designs, a 25-ktonne Theia-25 detector filled with a water-based liquid scintillator (WbLS) placed at Sanford Underground Research Facility (SURF). Currently, only two detectors in the world have measured...
An accurate determination of the neutrino flux produced by the Neutrinos at the Main Injector (NuMI) and the Long-Baseline Neutrino Facility (LBNF) beamlines is essential to the neutrino oscillation and neutrino interaction measurements for the Fermilab neutrino experiments, such as MINERvA, NOvA, and the upcoming DUNE. In the current flux predictions, we use the Package to Predict the FluX...
Using the density matrix equations (DME) for high scale leptogenesis based on the type I seesaw mechanism, in which the CP violation (CPV) is provided by the low-energy Dirac or/and Majorana phases of the neutrino mixing (PMNS) matrix, we investigate the 1-to-2 and the 2-to-3 flavour regime transitions, where the 1, 2 and 3 leptogenesis flavour regimes in the generation of the baryon asymmetry...
In the IceCube South Pole Neutrino Observatory, looking at well reconstructed track events from the southern sky results in an event sample filled with atmospheric muons and neutrinos created in cosmic ray air showers that dominate over a signal of astrophysical neutrinos. However, selecting from these events tracks that start inside the detector allows you to not only reject the muon...
A joint oscillation analysis of atmospheric neutrinos at Super-Kamiokande (SK) and accelerator neutrinos at Tokai-to-Kamioka (T2K) is in preparation. The atmospheric oscillation probability calculation is one of the most time-consuming parts of the fit and demands precision due to direct impact on oscillation parameter constraints. As an alternative to the existing method of pre-computing...
The Project 8 experiment aims to make a direct measurement sensitive to much of the unexplored range of neutrino masses. Past experiments used molecular tritium, which has a large energy smearing from its final states. Project 8 will use atomic tritium to reach a design sensitivity of $m_\beta\mbox{}\leq\mbox{}40\mbox{ }$meV. This requires $\mathcal{O}(10^{20})$ tritium atoms held at tens of...
The BeEST (Beryllium Electron capture in Superconducting Tunnel junctions) experiment searches for physics beyond the standard model (BSM) in the neutrino sector through momentum conservation in electron capture decay (EC) of $^7$Be [1]. For this purpose, $^7$Be$^+$ ions are directly implanted into high-resolution superconducting tunnel junction (STJ) quantum sensors [2], which allows the...
The goal of the KATRIN experiment is to measure the absolute mass of neutrinos with an unprecedented sensitivity of 0.2 eV/c².
To achieve this, understanding the background processes is of great importance. Currently, the background level exceeds the estimated design value by a factor of 15.
It is hypothesised that most of the measured background events originate from ionised Rydberg states...
The MAJORANA DEMONSTRATOR is a neutrinoless double-beta decay experiment located at the Sanford Underground Research Facility (SURF) in Lead, South Dakota. The DEMONSTRATOR contains an array of 44 kg of Ge detectors, of which 30 kg are enriched in the neutrinoless double-beta decay candidate isotope $^{76}$Ge. From the initial 26 kg yrs of exposure, the count rate in the background estimation...
KamLAND-Zen is a liquid scintillator detector searching for neutrinoless double beta decay in Xenon-136. Recently, KamLAND-Zen 800 set the first limit of this process in the inverted mass ordering region. One of the primary challenges of this search is the rejection of backgrounds from radioactive isotopes introduced by cosmic-ray spallation. We developed a state-of-the-art neural network...
The JSNS2 experiment aims to search for the existence of sterile neutrinos at J-PARC. A 1 MW beam of 3 GeV protons incident on a spallation neutron target produces an intense neutrino beam from muon decay at rest. The experiment searches for muon anti-neutrino to electron anti-neutrino oscillations which are detected by the inverse beta decay interaction, followed by gammas from neutron...
We present Beyond-the-Standard-Model (BSM) physics searches accessible to LEGEND-1000, a future neutrinoless double-beta decay (0νββ) experiment with the goal of 10 ton-years exposure. LEGEND-1000 will comprise a ton of High-purity Germanium detectors, enriched to more than 90% in $^{76}$Ge, surrounded by a 300 t of liquid argon (LAr) instrumented as an active radiation shield.
With its...
As part of the Deep Underground Neutrino Experiment (DUNE) near detector liquid argon prototyping program, four functionally-identical liquid argon time projection chamber (LArTPC) modules sharing a common cryostat will operate in Fermilab’s NuMI beamline in late 2022 in what is known as the ArgonCube 2x2 Demonstrator. Like any LArTPC, calibration of these modules is essential to pin down...
The present global analyses of the oscillation data do not agree on the octant in which the best-fit value of $\theta_{23}$ lies. Further, they allow $\sin^{2}\theta_{23}=0.5$ at 3$\sigma$ confidence level. Hence, it is imperative to question at what confidence level maximal 2-3 mixing can be ruled out. We study in detail the performance of DUNE to establish the deviation from maximal...
The Jiangmen Underground Neutrino Observatory (JUNO) is a neutrino medium baseline experiment under construction in southern China, expecting to begin data taking in 2023. The experiment has been proposed with the main goals of determining the neutrino mass ordering and measuring three oscillation parameters with sub-percent precision. To reach these goals, JUNO is located about 53$\,$km from...
In recent years, novel liquid scintillators have been developed allowing the separation of
Cherenkov and scintillation light. They hold the potential for a major breakthrough in neutrino
detection technology, allowing development of large, low-threshold, directional detectors suited
for the study of neutrino properties and astrophysical observations.
We perform two characterisation...
We present the status of the development of a Cherenkov telescope to be flown on an ultra-long-duration balloon flight, the Extreme Universe Space Observatory Super Pressure Balloon 2 (EUSO-SPB2). EUSO-SPB2 is an approved NASA balloon mission that is planned to fly in 2023 from Wanaka, New Zealand and is a precursor for future space-based missions to detect astrophysical neutrinos. The...
SuperNEMO is a neutrinoless double beta decay (0$\nu\beta\beta$) experiment, whose demonstrator module is located under the Frejus mountain in Modane, France, below 4800 m.w.e. It uses a unique technology combining a tracker and a calorimeter that allows it to unambiguously identify the two individual double-beta electrons, measure each particle's energy and their angular correlation. It aims...
The Hyper-Kamiokande experiment will search for the leptonic CP violation, following the successful T2K experiment. Neutrinos from an upgraded 1.3 MW beam produced at J-PARC will be detected by a far water Cherenkov detector located 300 km away from the beam source with a 184 kiloton of fiducial volume, resulting in 20 times higher interaction rate than that of T2K. The sensitivity to the CP...
The neutrino-electron scattering process is a powerful tool to explore new physics beyond the standard model. Recently the possibility of DUNE Near Detector (ND) to constrain various new physics scenarios using this process have been highlighted in the literature. In this work, we consider the most general U(1) model and probe the constraints on the mass and coupling strength of the additional...
Large Extra Dimensions (LED) are an elegant way to solve the hierarchy problem
while also giving rise to naturally small neutrinos masses. LED models
introduce a tower of massive Kaluza-Klein (KK) modes that affect the neutrino
mass eigenstates and thus neutrino oscillations. We use data from oscillation
experiments such as MINOS, Gallium experiments and reactors
to constrain LED...
Dark matter (DM) direct detection experiments are entering the multiple-ton era and will be sensitive to the coherent elastic neutrino nucleus scattering (CE$\nu$NS) of solar neutrinos, enabling the possibility to explore contributions from new physics with light mediators at the low energy range. In this paper we consider light mediator models (scalar, vector and axial vector) and the...
Heavy neutral leptons (HNL) are SM-gauge-singlet fermions that mix with active neutrinos. We argue that beam-dump and other limits on these mixings $U$ cannot be directly applied to HNLs that interact with a light SM-gauge-singlet scalar $s$ which mixes with the Higgs boson. We reinterpret the limits from the DELPHI, Belle, and CHARM experiments taking into account the new decay channel $N\to...
Here we are analysing the data from Borexino phase II and constraining some non standard models. Specially, for neutrino magnetic moment, new scalars, vector bosons and NSI.
Our knowledge about 3$\nu$ mixing angles and the CP-phase are becoming more accurate day-by-day. In this high-precision era of neutrino oscillation, it is inevitable to investigate the unitarity of the 3$\nu$ mixing matrix. In this work, we study the impact of possible non-unitary neutrino mixing (NUNM) in the context of next-generation long-baseline experiments DUNE and T2HKK having one...
JUNO will be the largest ever built liquid scintillator detector for neutrino physics. It will be sensitive to various neutrino sources, and will have a unique contribution to the observation of the all-flavor neutrino flux from a Galactic core collapse supernova (CCSN) with high statistics. For the purpose of maximizing the physics reach of JUNO when used as a neutrino telescope, two trigger...
It is well known that the neutrino medium, such as the cosmic neutrino background, produces a tiny birefringence effect on electromagnetic waves. Recently, it was claimed that this effect may be enhanced by an additional presence of a plasma characterized by the electron plasma frequency. In our work, instead of considering the plasma, we consider a simple transparent refractive medium...
The SNO+ detector is a multipurpose neutrino detector based at SNOLAB in the Creighton mine in Ontario, Canada. Due to the 6010m.w.e overburden at SNOLAB, SNO+ experiences an average of 3 high energy cosmogenic muons per hour passing through the 6m radius Acrylic Vessel. These muons can create spallation neutrons and long lived unstable isotopes that can present a background to the...
Leptonic CP violation is one of the most important topics in neutrino physics. CP violation in
the neutrino sector is also strongly related to the nature of the neutrino: whether it is a Dirac
or a Majorana particle. In this contribution CP-violating effects in Majorana neutrino
oscillations in supernova media are studied. We show that resonances in neutrino-
antineutrino oscillations...
Any experiment aiming to measure coherent elastic neutrino-nucleus scattering (CEvNS) via nuclear recoils in cryogenic bolometers relies crucially on a precise detector calibration at sub-keV energies.
CRAB proposes a new calibration technique relying on the capture of thermal neutrons inside the target crystal. The subsequent emission of $\gamma$-rays of O(10 MeV) induces nuclear recoils at...
DANSS is a detector of reactor antineutrinos based on solid state scintillator
placed on a movable platform below the core of 3.1 GW industrial reactor of Kalininskaya NPP. DANSS detects up to 5000 neutrino events per day with the only 2% background. DANSS is collecting data for 6 years with more than 6 million inverse beta-decay events already collected. The primary goal of the experiment...
I propose new searches for a hidden/dark neutron that can mix with the Standard Model neutron. IsoDAR, a proposal to place an intense cyclotron near a large-volume neutrino detector deep underground, can look for a neutron regeneration signal with much lower backgrounds than surface experiments. This neutron-shining-through-a-wall search would be possible without any modifications to the...
I introduce DarkNews, a fast Monte Carlo generator based on vegas for neutrino upscattering, trident scattering, and other leptonic processes at accelerator neutrino experiments. We simulate the production of lepton pairs and photons from the decay or exchange of new particles in neutrino-nucleus scattering. Pre-defined new-physics models include heavy neutral leptons with new scalar and...
The Daya Bay Reactor Neutrino Experiment was designed with the primary goal of precisely measuring the neutrino mixing parameter, $\theta_{13}$. Eight identically-designed gadolinium-doped liquid scintillator detectors installed in three underground experimental halls measure the reactor antineutrinos from six nuclear reactors with different distances. Until its shutdown at the end of 2020,...
We present a generic structure (the layer structure) for decoherence effects in neutrino oscillations by combining the concept of the open quantum system and quantum field theory, which include and parameterize decoherence effects from quantum mechanical and classical uncertainties. With the help of the layer structure, we classify the former as state decoherence (SD) and the latter phase...
The Pacific Ocean Neutrino Experiment (P-ONE) is an initiative to develop a new neutrino telescope to be deployed in the Northern Pacific Ocean, off the shore of British Columbia. This neutrino telescope will allow us to search for astrophysical neutrino sources and gain significant insights into the physics of the cosmos. A pathfinder mission was deployed in 2018 to study the optical...
The MicroBooNE detector, located in the Booster Neutrino Beamline (BNB) at Fermilab, has been operating since 2015. MicroBooNE's Liquid Argon Time Projection Chamber is accompanied by a Photon Detection System (consisting of 32 PMTs) used to measure the argon scintillation light and determine the timing of the neutrino interactions. This work demonstrates the analysis techniques developed to...
ZICOS is a future experiment for 0$\nu \beta \beta$ of $^{96}$Zr nuclei. In order to achieve sensitivity over $10^{27}$ years, ZICOS will use tons of $^{96}$Zr, and need to remove $^{208}$Tl backgrounds as observed by KamLAND-Zen one order of magnitude. For this purpose, we have developed new technique to distinguish the signal and background using topology of Cherenkov light. We have measured...
Abstract
Nowadays the standard way to describe neutrino oscillations is the quantum-mechanical approach in terms of plane waves, because the current description of the phenomenon within quantum field theory with the help of localized wave packets is very bulky [1]. However, there was an earlier attempt to describe neutrino oscillations within the standard Feynman diagram technique [2]. We...
Abstract abou the ABC front end board electronics used for the readout of the Small PMT at JUNO experiment
The detector of Jiangmen Underground Neutrino Observatory (JUNO) is the largest underground liquid scintillator detector in the world, and it is expected to start data-taking in 2023. The JUNO detector mainly consists of a 20 kton liquid scintillator and a large number of photomultiplier tubes. It will work as a multi-purpose detector, aiming to determine the neutrino mass ordering as its...
The Advanced Mo-based Rare process Experiment (AMoRE) is an international collaboration searching for the neutrinoless double-beta decay of 100Mo using molybdenum-based scintillating crystals with metallic magnetic calorimeters (MMC). The collaboration is preparing for phase-II of the experiment in which lithium molybdate(Li$_2$MoO$_4$) crystals will be the main target meterial. We have made...
In this work we study the potential of the future experiments INO, JUNO and T2HK to determine the neutrino mass ordering. When these three experiments are combined, one can achieve mass ordering sensitivity at a significant confidence level irrespective of the energy resolution of JUNO or the value of $\delta_{\rm CP}$. The main synergy between the reactor experiment and the...
A joint oscillation analysis of atmospheric neutrinos at Super-Kamiokande (SK) and accelerator neutrinos at Tokai-to-Kamioka (T2K) is in preparation. Apart from the increase in statistics and the lifting of degeneracies providing improved constraints on oscillation parameters, the systematics in T2K and SK’s analyses share many common features and have been carefully studied for the joint...
The detection of Coherent Elastic Neutrino-Nucleus Scattering (CEʋNS) could open a new window on physics beyond the Standard Model.
NUCLEUS is a reactor anti-neutrino experiment conceived for CEʋNS detection using CaWO4 and Al2O3 gram-scale ultra-low energy threshold (20 eV) cryogenic calorimeters.
The detector will be installed in a shallow depth experimental hall located in between...
The KATRIN experiment aims at the direct measurement of the electron neutrino mass with $\,0.2\,$eV/c² sensitivity. The high luminosity windowless gaseous molecular tritium source together with the magnetic adiabatic collimation of the electrostatic (MAC-E) filter technique allows for precision endpoint spectroscopy of the tritium beta decay. The analyses of the first and second tritium...
The Hyper-Kamiokande experiment (HK) is a complex of an intense neutrino beam facility, J-PARC, and a large water Cherenkov detector, HK. It covers wide physics goals, for instance, precise measurements of neutrino oscillation, proton-decay search, and supernovae neutrino detection. The neutrino detector HK will be equipped with 20,000 PMT of 50 cm diameter, whose timing resolution is 1 ns and...
The HOLMES experiment aims to determine neutrino mass with a calorimetric approach measuring the atomic de-excitation spectrum following the electron capture process in $^{163}$Ho ($\tau_\frac{1}{2} \sim 4570$ y). To achieve the best possible experimental sensitivity, an array of $\mathcal O$(1000) fast, 3 $\mu$s time resolution, transition edge sensors (TESs) of an $\mathcal O$(1 eV) @ 1 keV...
We show that the crucial measurement of the CP violation phase ($\delta_{\mathrm{CP}}$), planned to be performed at the DUNE experiment, can be spoiled if we assume the decoherence phenomena in nature, with sizeable effects. Considering this framework, we find that the $\sin^2{\theta_{13}}$ and $\delta_{\mathrm{CP}}$ can be distorted from the current best-fit values. The discrepancies for...
Lorentz violation (LV) and non-standard interactions (NSI) are two of the most popular scenarios beyond the Standard Model (BSM) of particle physics. Both of these BSM physics can affect neutrino oscillation significantly. However, their effects can mimic each other, and it would be difficult to distinguish between them at a long-baseline experiment. Here, we show how the atmospheric...
Exposing kt-scale water-based liquid scintillator (WbLS) optical detectors to GeV-level neutrino beams provides a unique opportunity to make both a world-leading long-baseline high-energy neutrino oscillation measurement and numerous unprecedented low-energy physics measurements. For long-baseline neutrino oscillation measurements, WbLS detectors such as Theia, have comparable performance to...
The DsTau/NA65 experiment aims to study 𝐷𝑠 → 𝜏 + 𝜈𝜏, 𝜏 → 𝑋 + 𝜈𝜏 differential production cross section in proton-tungsten interactions at CERN SPS. The emulsion detection technology is adopted to observe 𝐷𝑠 decays which have a small kink angle and a short flight length. The experiment will provide an independent ντ flux prediction for future neutrino beams with accuracy below 10%. Then,...
The standard three-neutrino oscillation framework seems to be rather established; however, the percentage level of the precision on the mixing parameters still leaves room for effects not described by the standard physics. Future long baseline (LBL) accelerator experiments will play an important role in the search for new physics effects in neutrino oscillations. Indeed, such experiments will...
The unified approach of Feldman and Cousins allows for estimating confidence intervals for datasets with small statistics that commonly arise in high energy physics. It has gained widespread use, for instance, in measurements of neutrino oscillation parameters in long-baseline experiments. However, the approach is computationally intensive as it is typically done in a grid-based fashion over...
Coherent elastic neutrino-nucleus scattering (CEνNS) is a new tool for examining the Standard Model and searching neutrino electromagnetic properties, which can be a manifestation of new physics [1]. We study the electromagnetic contribution to elastic neutrino-nucleon and neutrino-nucleus scattering processes. Following our approach developed for the case of elastic neutrino-electron [2] and...
Charged-current scattering of $\nu_{e} \;$ below 100 MeV from ${}^{16}\textrm{O}$ nucleus is not yet measured. This interaction is a $\nu_{e} \;$ detection channel for water Cherenkov detectors in case of a supernova burst. Furthermore, in Super-Kamiokande diffuse supernova neutrino background (DSNB) is being searched with the inverse beta decay process and $\nu_{e} \;$ - ${}^{16}\textrm{O}$...
The NUCLEUS experiment aims for the first fully coherent detection of coherent elastic neutrino-nucleus scattering (CE$\nu$NS) at a new experimental site between the two 4 GWth reactor cores of the Chooz power plant. The signature of a CE$\nu$NS event will be a nuclear recoil at the 20 eV-scale inside a CaWO4 target crystal. At this energy scale, a reliable simulation of...
The Project 8 experiment is a next generation neutrino mass experiment that aims to measure the absolute neutrino mass with a sensitivity of 40 meV by measuring the electron energy spectrum close to the tritium beta endpoint. To overcome statistical and systematic limitations of current direct neutrino mass experiments, Project 8 uses the new detection method of cyclotron radiation emission...
The nuclear matrix element of neutrinoless double-β decay is an essential input for determining the neutrino effective mass, if the half-life of this decay is measured. Reliable calculation of this nuclear matrix element has been a long-standing problem because of the diversity of the predicted values of the nuclear matrix element, which depends on the calculation method. In this study, we...
Primordial black holes (PBHs) with initial mass ~10^15 g are currently breathing their last breaths due to Hawking radiation. As transient burst events, their deaths are expected to produce copious amounts of neutrinos, both directly and indirectly from the decay of other emitted particle species. If such a PBH burst occurs in the local neighborhood, they can produce a detectable signal in our...
We study the evolution of the lepton number for a SU(2) doublet consisting of a massive neutrino and a charged lepton. By choosing a specific initial lepton family for a neutrino we can compute the evolution of all lepton family numbers. We study the phenomenology of relativistic and nonrelativistic neutrino physics under this framework. The nonrelativistic region is of particular interest...
We present a phenomenological study of MicroBooNE’s ability to investigate $e^+e^-$ final states produced in dark photon mediated neutrino-upscattering—a beyond-Standard Model process proposed as a solution to the MiniBooNE anomaly. Utilising the similarities shared between the observable signatures of neutrino-induced $e^+e^-$ and single photons originating in the radiative decays of the...
In this work, we study the non-classical nature of neutrino oscillations by considering open quantum system dynamics. In this context, we consider non-local advantage of quantum coherence (NAQC) as a measure of nonclassicality to discriminate between Dirac and Majorana neutrinos. We observe that in the presence of decoherence, NAQC parameter takes different values for Dirac and Majorana...
We explore the neutrino signals from proton decays catalyzed by GUT monopoles in the Sun. Three typical proton decay modes, $p \rightarrow e^+ \pi$, $p \rightarrow \mu^+ K^0$ and $p \rightarrow \bar{\nu}_e \pi^+$, have been analyzed for the Super-Kamiokande experiment. The monopole-induced neutrinos arise from interactions and subsequent decays of the proton decay products. To obtain the...
The seesaw models can naturally explain the neutrino masses and the matter-antimatter asymmetry of our universe. The seesaw scale is usually very high and one can integrate out the heavy degrees of freedom to obtain the seesaw effective field theory (SEFT). We establish the connection between the full seesaw model and the low-energy SEFT from a complete new point of view: the invariant theory....
The discovery of the phenomena of neutrino oscillations suggests that neutrinos have non-zero masses, providing solid experimental evidence for physics beyond SM (BSM). To explain the non-zero masses of neutrinos, SM needs an extension. We use the Standard Model Extension (SME) framework to analyze Lorentz Invariance Violation (LIV), wherein the LIV effects are treated as a perturbative effect...
The time profile of neutrino emissions from core-collapse supernovae contains unique information about the dynamics of the collapsing stars and the behavior of particles in dense en- vironments. The observation of neutrinos from the SN1987A supernova, in the Large Magellanic Cloud, marked the beginning of neutrino astronomy. To date, no other supernova neutrino obser- vation has been made. It...
PROSPECT-I, the first phase of the Precision Reactor Oscillation and SPECTrum Experiment, demonstrated the observation of reactor antineutrinos in an aboveground detector with good energy resolution and well-controlled backgrounds at a baseline of $\sim$7m from the High Flux Isotope Reactor (HFIR) reactor at Oak Ridge National Laboratory. The PROSPECT collaboration is now preparing an upgraded...
The goal of the SoLid experiment is to conduct a search for active-to-sterile anti-neutrino oscillation at a very short distance (6.3-8.9 m) from the core of the SCK-CEN BR2 research reactor in Mol, Belgium, and provide a unique and complementary test of the so-called Reactor Antineutrino Anomaly. A secondary objective of the experiment is to measure the pure U-235 antineutrino spectrum with a...
The nucleon axial form factor is not only a fundamental property for the understanding of hadron structure but also a key ingredient of neutrino-nucleon cross sections, whose precise knowledge is required for the analysis of neutrino oscillations. We have calculated this form factor at low momentum transfers in relativistic Baryon Chiral Effective Theory, using the extended on mass shell...
This poster shows the use of Zonal Harmonic Field Expansion for fast electric and magnetic field simulations with the superposition principle, and for near-realtime adiabatic electron tracking. Various measurements in the KATRIN experiment require special main spectrometer coil current and electrode potential configurations, most prominently the recent Shifted Analyzing Plane background...
The IceCube Neutrino Observatory, a gigaton ice Cherenkov detector located at the South Pole, detects a high rate of atmospheric neutrinos. The DeepCore array extends IceCube’s detection of atmospheric neutrinos down to GeV-scales, which is the range necessary to measure neutrino oscillations. With the high statistics atmospheric neutrino sample, the reconstruction of GeV-scale IceCube...
CUPID-0, an array of Zn$^{82}$Se cryogenic calorimeters, was the first large-scale demonstrator of the scintillating bolometers technology. The first project phase (March 2017 - December 2018) allowed to set the most stringent limit on the neutrinoless double beta decay half-life of the isotope of interest, $^{82}$Se. After a six months long detector upgrade, CUPID-0 began its second and last...
SNO+ is a phased experiment to ultimately search for neutrinoless double beta decay in a Tellurium-loaded liquid scintillator detector. From 2017 to 2019, SNO+ operated as a pure water Cherenkov detector with a very low energy threshold. The 2.2 MeV gammas, characteristic of neutron captures, were detected with an efficiency around 50%, allowing the identification of inverse beta decays...
The CONUS experiment aims at detecting coherent elastic neutrino nucleus scattering (CE$\nu$NS) at the commercial nuclear power plant in Brokdorf, Germany. A high antineutrino flux is guaranteed at a distance of 17.1m to the reactor core with a maximum thermal power of 3.9GW$_{th}$. The recoils induced by the neutrinos are detected with four low energy threshold point-contact high-purity...
The light yield of a small undoped CsI crystal directly coupled with two SiPMs at about 77~Kelvin was measured to be $42.8 \pm 1.1$~photoelectrons (PE) per keV electron-equivalent (keVee) using $X$ and $\gamma$-ray peaks from an $^{241}$Am radioactive source. The operation of an undoped CsI crystal coupled with two SiPMs at 77~K was the first attempt in the world. The high light yield together...
The KM3NeT neutrino telescope is currently being deployed in the Mediterranean Sea. While the two sites, ORCA designed to study sub-TeV neutrinos and ARCA optimized for the TeV-PeV range, are not yet completed, the current effective area allows us to carry out the first searches for astrophysical neutrinos. In this contribution, we present the results of the search for MeV-TeV neutrinos from...
Neutrino self-interaction has been proposed as a solution to the Hubble tension, a discrepancy between the measured values of the Hubble constant from CMB and low-redshift data. However, flavor-universal neutrino self-interaction is highly constrained by BBN and laboratory experiments such as K-meson and tau decay, double-neutrino beta decay etc. In this talk, I will discuss the cosmology of...
Seesaw mechanism is a popular approach to give a viable explanation to the source of non-zero neutrino mass and to the cause of matter dominance of the Universe - two of the most important open problems that could not be answered by the Standard Model (SM) of Particle Physics. A minimal extension of the SM is studied, incorporating type-I+II seesaw mechanism with only one right-handed neutrino...
Current activities of the Baikal-GVD neutrino experiment in the context of multi-messenger searches for astrophysical sources of high-energy cosmic particle fluxes will be presented with an emphasis on the results of follow-up of high-energy neutrino alerts.
In this contribution, we present the follow-up of several recent IceCube alerts, using the complementarity of the two neutrino detectors of KM3NeT: ORCA and ARCA, that cover together an energy range from few GeV to tens of PeV. At the time of the particular alerts, both detectors were in operation with partial configurations. The follow-up has been performed by looking for a signal excess in...
Arrays with tens to hundreds of Metallic Magnetic Calorimeters (MMCs), each implanted with $^{163}$Ho, were selected for the ECHo experiment, because of the excellent energy resolution of up to 2-3 eV, a fast response time below 1 µs, and a near-linear detector response that allows for a reliable energy calibration. Based on the performance achieved with the detectors developed for the first...
In the ECHo experiment, the effective electron neutrino mass can be determined by the analysis of the endpoint region of the calorimetrically acquired $^{163}$Ho electron capture spectrum. The spectrum was acquired using arrays of tens of low temperature metallic magnetic calorimeters enclosing the source. The fraction of $^{163}$Ho events which are in the region of interest can be as small as...
Last year the Tibet ASgamma experiment reported the observation of a diffuse gamma-ray emission from the Galactic plane with energy up to the PeV. This finding seems to be confirmed by LHAASO preliminary results. Both measurements provide the first evidence of a diffuse gamma-ray emission throughout the Galaxy up to such high energies.
These results have relevant implications for neutrino...
The recent detection of the coherent elastic neutrino-nucleus scattering (CE$\nu$NS) opens the possibility to use neutrinos to explore physics beyond standard model with small size detectors. However, the CE$\nu$NS process generates signals at the few keV level, requiring of very sensitive detecting technologies for its detection. The European Spallation Source (ESS) has been identified as an...
Next-generation Cosmic Microwave Background observations will scrutinize how it is lensed by the matter in the Universe, determined to see a signature of neutrino mass. Here, we show that this lensing pattern also contains rich information on neutrino interactions: new neutrino interactions would modify the neutrino equation of state at different redshifts, shaping the late-time energy density...
Recent follow-up campaign of IceCube neutrino alerts carried out by the Zwicky Transient Facility (ZTF) Collaboration has led to a transient association of a muon-track candidate (IC200530A) with the optical transient AT2019fdr. The transient has been classified as a Tidal Disruption Event by ZTF. Nevertheless, considering the photometric and spectroscopic properties of the event, a...
IceCube has detected an astrophysical flux of neutrinos, the majority of which was found to be of extragalactic origin. While hints for neutrino sources have been reported, the nature of the correlation between neutrinos and electromagnetic observations is still ambiguous. Moreover, the origin of thousands of astrophysical neutrinos in IceCube data are yet to be correlated to their sources....
The IceCube Neutrino Observatory is a gigaton Cherenkov detector embedded within the Antarctic ice sheet. Earth-crossing atmospheric neutrinos provide IceCube with access to a unique combination of oscillation channels which include tau neutrino appearance. By deploying seven additional columns of new sensors at ten times higher density than the rest of IceCube, the Upgrade is expected to...
Sterile neutrinos have been proposed as resolutions to a variety of open questions in physics, such as neutrino oscillation anomalies, the nature of dark matter, and origins of neutrino masses. A variety of models posit the existence a Heavy Neutral Lepton (HNL), a GeV-scale, sterile neutrino which can decay to well-understood Standard Model particles. HNL production from tau neutrinos and the...
Neutrino emission from supernovae has played a transformative role in the development of neutrino physics and our understanding of how the stars collapse. Growing evidence has established the presence of dense circumstellar material for core-collapse supernova, and the interaction of accelerated cosmic rays in the supernova ejecta and the circumstellar material will produce high-energy...
One of the most essential ingredients of precise measurement of neutrino oscillation parameters is the precise knowledge of neutrino energy. Due to heavy nuclear targets, nuclear effects introduce complications that create systematic uncertainties in neutrino energy reconstruction. These uncertainties further influence the determination of neutrino oscillation parameters. In this work, we...
Sterile neutrinos with keV-scale masses are popular candidates for warm dark matter. In the most straightforward case they are produced via oscillations with active neutrinos. We introduce effective self-interactions of active neutrinos and investigate the effect on the parameter space of sterile neutrino mass and mixing. Our focus is on mixing with electron neutrinos, which is subject to...
Effects of neutrino charge radius and magnetic moment constraints obtained from the astrophysical observations and reactor experiments as well as in-medium modifications of the constituents matter of neutron star (NS) on the electroweak interaction with matter in NS is investigated. Our interesting result on the neutrino mean free path and differential cross section with the neutrino form...
In the last decade, the IceCube Collaboration reported the existence of an astrophysical neutrino flux of ultra-high energy. In this extreme energy limit, the neutrino-nucleon interaction does occur in a kinematic domain inaccessible to the present terrestrial colliders. This situation is especially relevant when we consider the squared of the transferred momentum, Q², which can assume values...
We assess how the production of heavy neutral leptons (HNL) at the DUNE flux can affect the number of neutrino charged current (CC) events at the DUNE ND LArTPC. A deficit in the number of CC events at the LArTPC should be observed for HNLs with masses below the kaon mass. We estimate upper limits on the mixing parameters from the aforementioned deficit. We find that these limits are stronger...
The discovery of the phenomena of neutrino oscillations was the first firm experimental evidence of physics beyond the Standard Model (SM). To explain the neutrino masses and mixing, it requires an extension of the SM, called as beyond SM (BSM). The models describing BSM physics often comes with some additional unknown couplings of neutrinos termed as Non Standard Interactions (NSIs) [1]. The...
Neutrino oscillation experiments measure oscillation probabilities as functions of neutrino energy. The success of these experiments therefore largely depends upon their neutrino energy reconstruction accuracies. Nuclear effects and detector effects, however, can significantly affect neutrino event topologies seen by experiments in few-GeV energy region, and lead to large systematic...
We report on an update (2021) of a phenomenological model for inelastic neutrino- and electron-nucleon scattering cross sections using effective leading order parton distribution functions with a new scaling variable $\xi_w$. Non-perturbative effects are well described using the $\xi_w$ scaling variable in combination with multiplicative $K$ factors at low $Q^2$. The model describes all...
In electron capture processes, an electron of the parent atom is captured by the nucleus and an electron neutrino is emitted, leaving the daughter atom in an excited state. Precise calculations of the atomic de-excitation processes can be performed for isolated atoms. In practice, radioactive decay occurs with the atom in a medium. We present the possibility to study effects the environment...
The China Jinping Underground Neutrino Experiment~(CJPL) forsees completion of phase II construction around 2025. A hundred-ton liquid solar neutrino detector, Jinping Neutrino Experiment~(JNE), will be built 1 year after that.
We are going to review the status and plans of the project, including construction of the experiment site, design of the detector, instrumentation of the fast...
The use of spacings between ordered real-valued numbers is very useful in many areas of science. In particular, either unnaturally small or large spacings can be a signal of an interesting effect.
We introduce new statistical tests based on the observed spacings of ordered data. These statistics are sensitive to detect non-uniformity in random samples, or short-lived features in event time...
Neutrinos are particles which are extremely weakly interacting. These particles come in three flavor and tend to oscillate from one to another. Such oscillations result from a coherent superposition of neutrino mass states. However, no system in nature is completely an isolated system. Neutrinos, like any other system in nature, are no exception and should be treated as an open quantum system....
The IsoDAR neutrino source comprises a novel compact cyclotron capable of delivering 10 mA of 60 MeV protons in cw mode and a high-power neutrino production target. It has obtained preliminary approval to run at the new underground facility Yemilab in South Korea. IsoDAR will produce a very pure, isotropic $\bar{\nu}_e$ source, with peak neutrino energy around 6 MeV and endpoint around 15 MeV....
This poster presents a joint determination of the spectra of the reactor antineutrinos resulting from fissions of $^{235}U$ and $^{239}Pu$ by the Daya Bay and PROSPECT experiments. In the Daya Bay experiment, the antineutrinos were generated by six low-enriched uranium (LEU) commercial reactors with 2.9 GW thermal power each and detected by eight antineutrino detectors deployed in...
The JSNS2 experiment aims to search for sterile neutrinos with Δm2 near 1eV2. A 3 GeV J-PARC proton beam incident on a mercury target produces an intense neutrino beam from muon decay at rest which oscillates to anti-electron neutrinos. The JSNS2 detector is located at 24 m baseline from the target. The detector has a fiducial volume of 17 tons filled with GdLS, that efficiently can detect...
Rare event searches allow us to search for new physics at energy scales inaccessible with other means by leveraging specialized large-mass detectors. Machine learning provides a new tool to maximize the information provided by these detectors. The information is sparse, which forces these algorithms to start from the lowest level data and exploit all symmetries in the detector to produce...
The Weakly Interacting Massive Particles (WIMPs) so far remain one of the most popular candidates for dark matter. If captured gravitationally inside the core of the Sun, these WIMPs may produce high energy neutrinos as the end product in case they undergo self annihilations at the solar core. In this work, we address the detectability of such neutrinos at the proposed KM3NeT detector. Upper...
The KM3NeT/ARCA neutrino telescope will be fundamental to unveil the high-energy cosmic neutrino sources. In this contribution, we present the expectations of this detector for starburst galaxies observation, both as a diffuse signal and as point-like excess. To describe the diffuse flux, we make use of a recent theoretical model which implemented a “blending” of spectral indexes for...
Large liquid scintillator detectors, such as JUNO, present a new opportunity to study neutral current events from the low-energy end of the atmospheric neutrinos, and possible new physics signals due to light dark matter. We carefully study the possibility of detecting Large Energy Singles (LES), i.e., events with visible scintillation energy $>15$ MeV, but no other associated tags. For an...
The IceCube Neutrino Observatory is a gigaton-scale Cherenkov detector located within the South Pole glacial ice. The detector's sensitivity to neutrino signals from GeV to PeV energies allows for probes into hypothetical energy-sensitive nonstandard interactions (NSI). Using the range of matter baselines provided by Earth, IceCube has been able to constrain neutral-current NSI by searching...
In this work, we have modified a scenario, originally proposed by Grimus and Lavoura, in order to obtain maximal values for atmospheric mixing angle and $CP$ violating Dirac phase of the lepton sector. To achieve this, we have employed $CP$ and some discrete symmetries in a type II seesaw model. In order to make predictions about neutrino mass ordering and the smallness of the reactor angle,...
The extension of the standard model with new high-scale weakly coupled physics involving right-handed neutrinos in an effective field theory framework (SMNEFT) allows for a systematic study of heavy neutrinos phenomenology in current and future experiments. We exploit the outstanding angular resolution in future lepton colliders to study the sensitivity of forward-backward asymmetries to...
In a model with additional U(1) symmetry, anomaly free, the mass of the active neutrinos is generated by the inverse see saw mechanism. The muon and tau get masses at the tree level and the mass of the electron is generated by effective operators of dimension 7 by introducing a Lambda scale. Using a Monte Carlo simulation, the model parameters are adjusted according to the mass of the charged...
The neutrino sector contains several anomalous observations that cannot be reconciled with standard model physics, and neutrino detectors have given us a unique vantage point from which to probe weak physics. For these reasons neutrino detectors can be powerful tools in the search for beyond standard model (BSM) physics. Despite the great opportunity in this area, few tools are available to...
We introduce a neutrino mass model for leptogenesis where three right-handed Majorana neutrinos are involved and the minimal-extended seesaw mechanism produces four(3+1) light neutrinos. The CP asymmetry produced from the decays of heavy neutrinos and the dilution mass are described only in terms of the mixing elements of the fourth neutrino, $U_{e4}, U_{\mu 4}$ and $U_\tau 4$ which current...
The IceCube low energy extension DeepCore observes GeV-scale atmospheric neutrino events that only illuminate a small fraction of its photosensors. This makes event reconstruction challenging, and this challenge is magnified by the complex neutrino event topologies and the difficulty in modeling Cherenkov photon propagation in an inhomogeneous medium. These effects inhibit the use of analytic...
One of the most popular candidate of Dark Matter (DM) particle are the Weakly Interacting Massive Particles(WIMPs). These, once gravitationally captured in massive celestial objects and annihilating between them into Standard Model particles, can be indirectly detected. The centre of those massive objects is, therefore, a place where to look for a possible neutrino excess from DM annihilations...
We investigate the implication of modular $ A^{\prime}_5$ symmetry on neutrino oscillation phenomenology in the linear seesaw framework. In order to achieve the well defined mass structure for the light active neutrinos as dictated by the linear seesaw mechanism, we introduce six heavy fermion fields along with a pair of weightons to retain the holomorphic nature of the superpotential. ...
The light-only liquid xenon (LoLX) experiment is an R&D detector designed to perform studies of light emission, transport and detection in liquid xenon (LXe) detectors using silicon photomulitpliers (SiPMs) . LoLX aims to study the properties of xenon scintillation light and Cherenkov radiation, which will be used to refine existing simulation models, and provide input to the planned...
It is possible to increase sensitivity to low energy physics in a third or fourth DUNE-like module with careful controls over radiopurity and some modifications to a detector similar to the DUNE Far Detector design. In particular, sensitivity to supernova and solar neutrinos can be enhanced with improved MeV-scale reach. A neutrinoless double beta decay search with 136Xe loading appears...
We study the lepton flavor violating (LFV) decays such as mu-> e+gamma, tau-> mu+gamma, and tau -> e gamma, in the three-loop radiative seesaw model proposed by Krauss, Nasri, and Trodden. In this model, the relevant coupling constants are larger for the heavier scalars that run inside loop diagrams to generate the appropriate magnitude of neutrino masses. Imposing a criterion that all the...
While the elusive nature of neutrinos makes their detection non-trivial, they are an excellent candidate for long-range monitoring of nuclear reactors. Of the multitude of byproducts produced when an atom splits during nuclear fission, only antineutrinos can readily pass through meters of water and concrete shielding surrounding nuclear fuel. Antineutrino reactions in a water-Cherenkov...
Super-Kamiokande has observed boron-8 solar neutrino recoil electrons at kinetic energies as low as 3.49 MeV to study neutrino flavor conversion within the sun. At SK-observable energies, these conversions are dominated by the Mikheyev–Smirnov–Wolfenstein effect. An upturn in the electron survival probability in which vacuum neutrino oscillations become dominant is predicted to occur at lower...
The Jiangmen Underground Neutrino Observatory (JUNO) is a neutrino medium baseline experiment under construction in southern China, expecting to begin data taking in 2023.
The experiment has been proposed with the main goals of determining the neutrino mass ordering and measuring three oscillation parameters with sub-percent precision.
To reach these goals, JUNO is located about 53$\,$km...
We consider relatively heavy neutrinos νH, mostly contributing to a sterile state νs, with mass in the range 10 MeV ≲ms≲mπ∼135 MeV, which are thermally produced in the early universe in collisional processes involving active neutrinos, and freezing out after the QCD phase transition. If these neutrinos decay after the active neutrino decoupling, they generate extra neutrino radiation, but also...
Astrophysical neutrinos are mysterious particles of ultra-high energies with no known progenitor. Since 2011, the IceCube neutrino observatory has been detecting numerous neutrino events with energies of hundreds of TeV. However, it hasn’t been able to pinpoint source for the majority of events. The only exception is IceCube-170922A whose source is believed to be a blazar TXS 0506+056 that was...
Results of experiments like LSND and MiniBOONE suggest the presence of an eV scale sterile neutrino. We investigate the resonance matter effect in presence of sterile neutrino and present the analytical expressions of the neutrino oscillation/survival probabilities using Δ21=0 approximation. These analytical expressions help us to understand better the existing degeneracies, e.g.,...
The NINJA collaboration aims to study neutrino-nucleus interactions in the energy range of hundreds of MeV to a few GeV using an emulsion-based detector. Nuclear emulsion is suitable for precise measurement of positions and angles of charged particles from neutrino interactions since it has a sub-$\mu$m spatial resolution. It is capable of detecting slow protons as low as 200$\,$MeV/$c$, which...
We report the measured production rates of unstable isotopes 9Li and 8He produced by cosmic muon spallation on 12C using two identical detectors of the RENO experiment. Their β-decays accompanied by a neutron make a serious contribution to backgrounds of the inverse beta decay events in precise determination of the smallest neutrino mixing angle. The mean muon energy of its near (far) detector...
KM3NeT/ORCA is a neutrino telescope currently under construction in
the Mediterranean Sea near Toulon, France. Its ultimate goal is the
determination of the neutrino mass ordering based on several years of
data taking with an instrumented seawater mass of about 7 Mton. From
January 2020 until November 2020 KM3NeT/ORCA accumulated data
with six detection units, which corresponds to about...
Measurement of neutrino-water interactions is important for the current and future long-baseline neutrino oscillation experiments. The NINJA experiment aims to measure such interactions using a nuclear emulsion detector called Emulsion Cloud Chamber (ECC). The ECC has a sub-micron position resolution, thus short tracks of low-momentum charged particles can be detected. The momentum threshold...
In 2020, Super-Kamiokande introduced Gadolinium sulfate into the detector for the first observation of Diffuse Supernova Neutrino Background (DSNB). For the DSNB search, we have to precisely estimate the atmospheric neutrino background, however, it has still large uncertainty because the reaction of neutron with a few hundred's of MeV via oxygen nucleus is poorly understood. We conducted the...
The MINER$\nu$A experiment was designed to perform precision studies of neutrino-nucleus scattering in the GeV regime on various nuclear targets using the high-intensity NuMI beam at Fermilab. This poster outlines the current progress on MINER$\nu$A's first inclusive charged-current analysis of antineutrino interactions on iron, lead, and water using antineutrino energy and Bjorken $x$. The...
The IceCube Neutrino Observatory is a cubic kilometer-sized detector designed to detect astrophysical neutrinos. However, cosmic rays interacting in the atmosphere produce a significant number of muons in the southern equatorial sky. This work outlines a new dataset with large background rejection and high signal efficiency using a boosted decision tree. This dataset is also effective at...
RENO has been taking data since August, 2011 and successfully measured the smallest neutrino mixing angle, theta13. The measured value is obtained from the observed reactor anti-neutrino events with neutron captures on gadolinium (n-Gd) in the target detector region. The experiment has also measured the mixing angle using an independent sample of neutron captures on hydrogen (n-H). Because of...
We analyze the sensitivity achievable by the current and near-future water(ice)-Cherenkov atmospheric neutrino experiments in the context of standard three-flavor neutrinos oscillations.
In this study, we perform an in-depth analysis of the current shared systematic uncertainties, which arise from the common flux and neutrino-water interactions.
We then implement the systematic uncertainties...
The measurement of high-energy neutrino-matter interactions furthers our knowledge of nucleon structure and allows us to test proposals beyond the Standard Model: the higher the energy, the more piercing the probe. Ultra-high-energy (UHE) cosmic neutrinos, with EeV-scale energies (1 EeV = $10^{18}$ eV), offer the ultimate high-energy probes of neutrino physics. For fifty years, they have...
The DeepCore detector is a densely instrumented sub-array of the IceCube Neutrino Observatory designed to observe atmospheric neutrino interactions above 5 GeV via Cherenkov radiation in the Antarctic ice. At these energies, Earth-crossing muon neutrinos have a high chance of oscillating into tau neutrinos. While DeepCore is able to measure the atmospheric oscillation parameters with a...
MicroBooNE, a short-baseline neutrino experiment, sits on-axis in the Booster Neutrino Beamline at Fermilab where it is exposed to neutrinos with $\langle E_{\nu}\rangle\sim$ 0.8 GeV. Since this energy range is highly relevant to the Short Baseline Neutrino and Deep Underground Neutrino Experiment programs, cross sections measured by MicroBooNE will have implications on their searches for...
The IceCube Neutrino Observatory detects neutrinos at energies orders of magnitude higher than those accessible to current accelerator neutrinos and probes fundamental neutrino properties at energies otherwise not accessible. Above 40 TeV, neutrinos of astrophysical and atmospheric origin traveling through the Earth will be absorbed as they interact with nuclei, changing the zenith angle...
The Spallation Neutron Source (SNS), used by the COHERENT experiment as a source of neutrinos to measure CE$\nu$NS cross section, produces $\nu_e$, $\nu_{\mu}$, and $\bar{\nu}_{\mu}$ in energy ranges of a few tens of MeV. A heavy water Cherenkov detector is under construction to measure this neutrino flux in support of CE$\nu$NS measurement. The heavy water detector can also be used to measure...
When a burst of neutrinos from a core-collapse supernova (CCSN) passes by the Earth, it causes a permanent change in the local space-time metric, called the gravitational wave (GW) memory. Long considered unobservable, this effect will be detectable in the near future, at deci-Hertz GW interferometers. I will present a novel idea, where observations of the neutrino GW memory from CCSNe will...
Many astrophysical sources can emit neutrinos in the energy below a few to several MeVs. Detecting such neutrinos will provide us with valuable information on the physical processes that govern their evolution and structure. So far, neutrinos only from the Sun and a single event of supernova (SN 1987A) have been observed. However, as the size of neutrino observatories keep increasing and the...
The existence of an eV sterile neutrino has been motivated by the LSND results and, more recently by the Low-Energy Excess (LEE) observed in MiniBooNE. This new fermion would profoundly impact particle physics, astrophysics, and cosmology. A new generation of experiments is looking for it. The latest results from MicroBooNE appear to disfavor the interpretation of the LEE just in terms of...
MicroBooNE is a liquid argon time projection chamber (LArTPC) neutrino detector. One of its primary goals is to measure neutrino interaction cross sections on argon within the detector. These measurements will inform model developments and simulations for future LArTPC experiments including SBN and DUNE. Current electron neutrino cross section measurements on argon are limited but are...
Accurately measuring the flux of $^{8}$B solar neutrinos is an important check for the standard solar model. Due to the largest-ever mass of $^{13}$C in the liquid-scintillator detector, it is possible to have an model independent measurement of the $^{8}$B solar neutrino flux from elastic scattering, charged-current and neutral-current interactions at the Jiangmen Underground Neutrino...
The observation of the neutrino burst coming from the next Galactic Core-Collapse SuperNova (CCSN) and its gravitational wave and electromagnetic counterparts will provide us invaluable information on this extreme phenomenon. KM3NeT is a neutrino telescope consisting of two detectors, ORCA and ARCA, currently under deployment in the Mediterranean Sea. By searching for an excess of coincidences...
The TAO detector is designed to measure the reference spectrum of reactor antineutrinos with high precision for the JUNO experiment. Accurate calibrations together with constant monitoring of the stability of the TAO detector parameters are essential in this case. A multipurpose UV LED calibration system will be used to provide a time uniformity check for all the DAQ channels as well as the...
I present a new, open-source, pure Python program, MUTE (MUon inTensity codE) (arxiv:2109.11559, acc. in ApJ). MUTE combines the state-of-the-art codes MCEq (Matrix Cascade Equation) and PROPOSAL (PRopagator with Optimal Precision and Optimised Speed for All Leptons) to compute the cosmic ray cascades in the atmosphere and the propagation of muons through matter in separate steps. It is both...
Upcoming neutrino telescopes may soon be able to discover ultra-high-energy (UHE) cosmic
neutrinos, with energies beyond 100 PeV. Finding their sources would provide robust candidates
for the long-sought sources of ultra-high-energy cosmic-rays. We propose to do so by looking for
multiplets of UHE neutrinos in the sky. Focusing on neutrino radio-detection in IceCube-Gen2 as
a benchmark, we...
For decades, secondary scintillation in noble gases was assumed to be solely due to VUV emission from excimers, created in a three-body collision of two neutral atoms and one excited atom produced by electron impact - the so-called electroluminescence (EL) process.
Neutral Bremsstrahlung (NBrS) is non-excimer-based secondary scintillation, emitted when drifting electrons scatter on neutral...
It is believed that the running (for instance, COHERENT) and forthcoming terrestrial neutrino experiments will be sensitive to the neutrino charge radius [1] that is one of the neutrino fundamental electromagnetic characteristics [2] predicted [3] to be non-zero even in the Standard Model. In this work we continue our studies [4] on neutrino oscillations in an environment with large electric...
Neutrino scattering on atomic systems at low-energy transfer is a powerful tool for searching the neutrino electromagnetic interactions [1,2]. The regime of coherent elastic neutrino-atom scattering (CEνAS), i.e., when the atom recoils as a pointlike particle, can be effectively fulfilled in the case of tritium antineutrinos [3]. We present theoretical calculations for CEνAS processes on such...
Neutrino physics is entering a precision era and an important goal is to measure with high accuracy the neutrino oscillation parameters, to look for CP violation in the lepton sector, etc., for which the simultaneous knowledge of neutrino and antineutrino cross sections in the same energy region for a given nuclear target is required to reduce the systematics to a few percent level. In the few...
The long-existing problem of neutrino mass and mixing can be connected to cosmological phenomena, such as the leptogenesis and the existence of dark matter (DM). In the extension of the type I seesaw model with two right-handed (RH) neutrinos, the seesaw Yukawa can drive the DM production, even with the competition from gravitational effect and constraints from leptogenesis. However, the DM...
We present how small Dirac neutrino masses can be produced by introducing many light mixing partners for the neutrino within the framework of TeV scale Quantum Gravity Theories. We give a general formula how to calculate the resulting SM flavor eigenstates in this context. This infrared way of generating neutrino masses leads to deviations in the oscillation behaviour of SM neutrinos.Then we...
Axions and axion-like particles (ALPs) are some of the most popular candidates for dark matter [1]. Axions are also considered [2] as new physics contributions to the muon g – 2 . Following the existed interest to ALPs we consider interaction between neutrinos and hypothetical axion-like particles and derive for the first time the probability of neutrino oscillations accounting for their...
We study the capability of INO-ICAL to determine the atmospheric neutrino oscillation parameters. We do not use any generator level information but instead use only the output of GEANT4 simulation of the atmospheric neutrino events in the detector. In a similar previous study, by other authors, only the momentum and direction of the longest track were used. In this study, we consider a third...
The information about the Earth's interior structure comes from seismic studies and gravitational measurements. The Preliminary Reference Earth Model (PREM) of the density of the Earth is obtained by measuring the travel time of seismic waves. Here, the density distribution inside the Earth is estimated from the model-dependent empirical relations having assumptions based on temperature,...
The proposed work is an extension of the Standard Model, where we have introduced two anomaly free gauge symmetries i.e. $U(1)_{L_e-L_\mu}$ and $U(1)_{B-L}$ in an inverse seesaw framework. For this purpose, we have included three right handed neutrinos $N_{R}$, three neutral fermions $S_{L}$ and two scalar singlet bosons ($\chi_1,\chi_2$). We are able to get a definite structure for neutrino...
KM3NeT is a series of neutrino telescopes under construction in the Mediterranean Sea. The detectors will consist of 3D arrays of 3’’ PMTs distributed on 115 vertical detection units (DUs), each containing 18 digital optical modules (DOMs), with each DOM hosting 31 PMTs. The ORCA detector is designed with a dense arrangement of DOMs to study GeV-scale atmospheric neutrino oscillations. An...
Astrophysical objects capable of hadronic acceleration to relativistic energies have long been believed to be sources of astrophysical neutrinos. Nevertheless, the long exposure neutrino sky map shows no significant indication of point-like sources so far. This may point to flaring objects or a large population of faint, steady sources as origins of this flux. The spatially and temporally 3σ...
NOvA is a long-baseline accelerator-based neutrino oscillation experiment that measures electron-neutrino appearance and muon-neutrino disappearance using the NuMI beam and a near detector, both located at Fermilab, as well as a far detector, located in Ash River, Minnesota. The high flux of muon neutrinos at the near detector allows for measurement of rare processes such as neutrino trident...
The aim of this presentation is to introduce a dark extension of the SM that communicates to it through three portals: neutrino, vector and scalar mixing, by which it could be possible to explain the LEE at MiniBooNE. The model regards particularly the upscattering of HNLs (1 to N heavier Dirac or Majorana neutrinos) by the mediation of a dark photon, Z’, with masses around 10 MeV – 2 GeV,...
We discuss the contribution of right-handed neutrinos (RHNs) to the neutrinoless double beta decay within the minimal type-I seesaw model by virtue of the intrinsic seesaw relation of neutrino mass and mixing parameters, and the mass dependence of the nuclear matrix elements from different nuclear models. In the viable parameter space, we find the possibilities of both the enhancement and...
In ref.[1], we have reported the quantification of bipartite and tripartite entanglement measures in two and three neutrino systems, respectively. In the tripartite system, the correlations exhibited by neutrino oscillations are like the W-states which are legitimate physical resources for quantum information tasks. Moreover, quantum studies of neutrinos has been done on IBMQ processors in...
Reactor anti-neutrinos after being discovered for the first time by Reines and Cowan, have been observed and studied by various neutrino physics experiments for different purposes. Electron anti-neutrinos are elementary particles that are inextricably associated with nuclear fission and are produced in a nuclear reactor as a result of beta decay of fissioning isotopes. Since the amount of...
When searching for supernova relic neutrinos (SRN), the candidate neutrino event can be detected through an inverse beta decay (IBD) reaction in a water Cherenkov detector, such as the Super-Kamiokande experiment. The signal from this reaction consists of a prompt signal from the positron and the delayed neutron capture signal. Neutral current quasi-elastic (NCQE) interactions of atmospheric...
The magic texture is one of the successful textures of the flavor neutrino mass matrix for Majorana neutrinos. In this paper, it turns out that two new types of magic textures are also consistent with neutrino oscillation experiments, observation of cosmic microwave background radiation, and neutrinoless double beta decay experiments. The connection be- tween these new magic textures and the...
Non-local correlations are usually quantified in terms of Bell's inequality parameter [1]. Recently it was shown that a non-local advantage of quantum coherence (NAQC) is a stronger measure of non-locality as compared to Bell's inequality parameter in the neutrino systems [2]. We analyse the effects of non-standard interaction (NSI) on these measures in the context of several accelerator and...
The Nu Tools study was developed to explore the potential roles for neutrino within nuclear energy and nuclear security. This effort differs from previous neutrino detector studies as it is focused on the potential utilities and determining if there is a possible use case for neutrino detectors as a monitoring technology. Due to the importance of understanding potential use cases, this effort...
All the neutrino/antineutrino experiments being performed in the few GeV energy region are using moderate to heavy nuclear targets where the contribution to the cross section comes from the quasielastic, inelastic and deep inelastic scattering processes. A better understanding of hadron dynamics in the nuclear medium is required to reduce the systematics considerably in the analyses of...
The creation of the baryonic asymmetry of the universe (BAU) via leptogensis involves at least one new scale which in the traditional set-up results in an unobservable heavy neutral lepton (HNL). We investigate within the well established low-scale leptogensis model via oscillations the testability prospects of future experiments as SHiP and FCC. To this end we not only numerically solve the...
The KArlsruhe TRItium Neutrino experiment currently provides the best neutrino mass upper limit of 0.8 eV/c2 (90% C. L.) in the field of direct neutrino-mass measurements [1]. This result has been obtained with only 5% of the anticipated total measurement time. However, reaching the target sensitivity of 0.2 eV/c2 at 90% C. L. not only requires the full measurement time, but also the detailed...
MicroBooNE is an 85-tonne active mass liquid argon time projection chamber at Fermilab which uses a liquid argon filtration system to remove electronegative impurities. To study the efficiency of the filtration system, we placed a 500 kBq radon source in the cryogenic system, upstream of the filters, and use MeV-scale reconstruction to search for activity in the MicroBooNE TPC. We find that...
KM3NeT is a multi-purpose cubic-kilometer neutrino observatory under construction in two different sites of the Mediterranean Sea. It consists of ORCA and ARCA (for Oscillation and Astroparticle Research with Cosmics in the Abyss, respectively) telescopes, currently taking data with the first set of detection lines in operation. Although having different primary goals, both detectors can be...
https://crumbsoftware.com:3001/neutrinos2.htm
1.Selectable oscillation parameters and demonstration of the effects of changes to theta angles have on neutrino oscillations at different distances.
2.Live animation together with video and slideshow of the T2K experiment in Japan. Shows the effect of Muon oscillation over the 295km distance.
3.Detail display and sequencing of the relevant...
When a neutrino propagates through a medium, the oscillations are modified by forwarding scattering with particles of the medium, which generates a potential in the Hamiltonian. The most famous one is the Wolfenstein potential due to forward scattering with electrons, which leads to the MSW effect. In environments with a high density of neutrinos, such as in supernovae and the early universe,...
In this paper, we study the hierarchy sensitivity of Protvino to ORCA (P2O) experiment in three flavor scenario as well as its sensitivity to non-standard interactions (NSI) in neutrino propagation. Because of the largest possible baseline length of 2595 km, P2O is expected to have strong sensitivity towards neutrino mass hierarchy and NSI parameters. In our study, we show that even though the...
We exhibit the geometric structure of the convex cone in the linear space of the Wilson coefficients for the dimension-8 operators involving the left-handed lepton doublet $L$ and the Higgs doublet $H$ in the Standard Model effective field theory (SMEFT). The boundary of the convex cone gives rise to the positivity bounds on the Wilson coefficients, while the extremal ray corresponds to the...
Particle-identification (PID) is a crucial part for all analyses performed with the KM3NeT neutrino telescopes. It is used to separate atmospheric neutrino from background events (atmospheric muons, $ ^{40}\mathrm{K}$ decay) and further, to distinguish track- and shower-like events, allowing the identification of the neutrino flavour.
One of the main algorithms used for event classification...
The PALEOCCENE concept offers the potential for room-temperature, passive, crystal-based detectors for the detection of low-energy nuclear recoil events. Nuclear recoil events can be caused by coherent elastic neutrino nucleus scattering (CEvNS), neutron scattering, or dark matter scattering and therefore, PALEOCCENE could find applications in all three areas. Nuclear recoils result in damage...
In recent years, silicon photomultiplier (SiPM) has been widely used to replace photomultiplier tube (PMT) for scintillator readout, especially in high performance neutrino experiments. SiPM offers gain similar to those of PMT, but with merits such as higher quantum efficiency, low bias voltage, compact volume, high ruggedness, and magnetic field compatibility. However, SiPM is indeed inferior...
The proposed 5-ton liquid xenon TPC of the nEXO experiment will search for the elusive neutrinoless double beta decay of $^{136}$Xe. This poster will describe the status of some charge and light calibration strategies of double beta decay charge clusters. One strategy is use the photo-electricity of gold to produce electron clusters, and measure their properties as they drift through a volume...
DUNE is a next-generation, long-baseline neutrino oscillation experiment. The System for on-Axis Neutrino Detection (SAND) is one of the three Near Detector components, permanently located on-axis. Its primary goals are the monitoring of the beam and the measurement of the neutrino flux, along with a broader physics program including precision measurements of neutrino cross-sections. This will...
The IceCube discovery of high-energy astrophysical neutrinos, with TeV-PeV energies, has bolstered neutrino astronomy. However, because the detection rate of high-energy astrophysical neutrinos remains low, various important questions about them, notably their origin, remain unanswered or answered only uncertainly. This situation will improve when new neutrino telescopes will come online in...
The search for cosmic neutrino sources has intensified after the discovery of a high-energy diffuse neutrino flux. Track detection signatures from muon neutrinos are promising in pinpointing neutrino sources due to their excellent angular resolution. Cascade signatures have an inferior angular resolution, but can still contribute in discovering new sources. The KM3NeT/ARCA detector is...
The Jiangmen Underground Neutrino Observatory (JUNO) is a 20 kt liquid scintillator detector with the main goal to determine the neutrino mass ordering. To reach this goal, JUNO is designed to have an energy resolution of 3%/$\sqrt{𝐸(\text{MeV})}$ and it will measure the reactor neutrino spectrum from two nuclear power plants located in a distance of around 53 km from the detector. One crucial...
The coherent elastic neutrino-nucleus scattering process (CE$\nu$NS) is a powerful probe of the possible new neutral boson in the theory beyond the standard model, which is a possible explanation of the muon $(g-2)_\mu$ anomaly. CE$\nu$NS was first observed in 2017 at the COHERENT experiment by the cesium-iodide (CsI) detector and later in 2020 at the argon (Ar) detector. Recently, the new...
KM3NeT is a research infrastructure that will house a network of next-generation neutrino detectors located in the seabed of the Mediterranean Sea. The infrastructure is currently under construction and consists in two configurations: atmospheric neutrino oscillation research at GeV energies (ORCA) and detecting high-energy cosmic neutrinos from Galactic and extra-Galactic sources (ARCA). The...
Reactor experiments provide an excellent platform to investigate the atomic ionization effects induced by the unexplored neutrino interaction channels. Including the atomic effects in our calculations, we study the neutrino-electron scattering by reactor anti-neutrinos in low-energy electron recoil detectors such as Si/Ge in light of neutrino non-standard interactions with leptons. We find...
We update and expand on past efforts to predict the leptonic Dirac CP-violating phase with models of perturbatively modified tribimaximal mixing. Simple perturbations are applied to the tribimaximal mixing pattern in the form of rotations between two sectors. By translating these perturbed mixing matrices to the standard parameterization for the neutrino mixing matrix we derive relations...
The NEXT collaboration is pursuing a phased program to search for neutrinoless double beta decay(0nubb) using high pressure xenon gas time projection chambers. Xenon gas detectors offer a key opportunity: the plausible implementation of single barium daughter ion tagging, an approach that may reduce radiogenic and cosmogenic backgrounds by orders of magnitude and unlock sensitivities that...
Since the weak sector is one of the only places explored by the Standard Model (SM), there is hope that studying neutrinos may provide insight into physics beyond the Standard Model (BSM). For this purpose, neutrino telescopes have broad programs searching for the effects of BSM physics; however, the phenomenological community, which predicts the observational effects of BSM models, does not...
PROSPECT-I: Updated results for Sterile Neutrino Oscillation search
Jose Palomino, Bryce Littlejohn
Illinois Institute of Technology...
We discuss the potential sensitivities of next-gen neutrino telescopes in the northern hemisphere, such as KM3NeT ORCA and ARCA on dark matter annihilation in the Galactic halo.
With its energy and angular resolutions, as well as advantages sky coverage taken into account, we show that KM3Net is expected to yield very competitive limits for dark matter annihilations. We also discuss the...
As an underground multi-purpose neutrino experiment with a detector of 20 kton liquid scintillator, Jiangmen Underground Neutrino Observatory (JUNO) is competitive with and complementary to the water-Cherenkov detectors on the search for the diffuse supernova neutrino background (DSNB). We employ the latest information on the DSNB flux predictions and investigate in detail the background and...
In this poster I would like to discuss our recent results on the pseudoscalar sterile neutrino self-interactions model.
In particular, we reassess the viability of a cosmological model including a fourth additional sterile neutrino species that self-interacts through a new pseudoscalar degree of freedom.
To that end, we perform a series of extensive analyses fitting various combinations of...
As an underground multi-purpose neutrino observatory with 20 kton liquid scintillator (LS), JUNO has excellent potential to first detect Diffuse Supernova Neutrino Background (DSNB). The dominant background for the DSNB is the Neutral-Current (NC) interaction of atmospheric neutrinos with C-12 nulei in LS. The final state particles of NC interactions usually contain α,p,n, in contrast to...
We will describe a study on pulse shape discrimination (PSD) with signals from Neutrino Experiment for Oscillation at Short baseline II (NEOS II). In an experiment using a liquid scintillator detector, such as the NEOS II, PSD plays an important role in distinguishing the signals of electron-induced events from those of fast neutron-induced events to improve the signal-to-background ratio. The...
The JSNS2 (J-PARC Sterile Neutrino Search at the J-PARC Spallation Neutron Source) experiment searches for neutrino oscillations at 24m baseline from the J-PARC’s 3 GeV 1 MW proton beam incident on a mercury target at the MLF. The particles from the mercury target are detected at the JSNS2 detector which is filled with the gadolinium (Gd) -loaded Liquid Scintillator (LS). The Fast Neutron (FN)...
Charged-current quasielastic scattering is the signal process in modern neutrino oscillation experiments and one of the tools for the reconstruction of the incoming neutrino energy. Exploiting effective field theory, we factorize neutrino-nucleon quasielastic cross sections into soft, collinear, and hard contributions. We evaluate soft and collinear functions from QED and provide a model for...
Readout of low-intensity microwave signals over a wide bandwidth has become increasingly important for fundamental science. The high frequency allows high information transfer, ideal for multiplexing detectors and reducing low-frequency noise.
This work presents the design and calibration of frequency-multiplexed readout for Ricochet, a segmented coherent neutrino scattering detector. The...
The construction of the next-generation far detector Hyper-Kamiokande (HK) has started. It will have ten times larger fiducial volume and increased detection performances. The data taking is planned for 2027. Time stability is crucial, as detecting physics events relies on reconstructing Cherenkov rings based on the coincidence between the photomultipliers. The above requires a timebase jitter...
The experimental observations from the colliders established the standard model (SM), the most
successful phenomenological framework to explain the non-gravitational interactions of fundamental
particles at high energy. Non-zero neutrino mass and dark matter cast a shadow over its success.
This necessitates the extension of the SM. The most straightforward and elegant extension of the...
In 2020, we demonstrated significant evidence for bright radio blazars being a dominant source of high-energy astrophysical neutrinos seen by IceCube. Later years have brought more neutrino detections, which further increase the confidence of the neutrino-blazars association. A notable example is the recent IceCube alert on 2022-02-05 that came from the direction of the PKS 1741-03 blazar....
The Jiangmen Underground Neutrino Observatory (JUNO) is a multiple-purpose neutrino experiment with a 20-kiloton liquid scintillator detector. Its primary goal is the determination of the neutrino mass ordering by detecting the inverse beta decay events induced by antineutrinos from two nuclear reactor power plants placed at about 53 km distance. The scintillation light will be read by about...
AMoRE is an underground experiment searching for the neutrinoless double beta decay of $^{100}Mo$ using cryogenic detectors based on molybdate crystal scintillators enriched in $^{100}Mo$. The next phase experiment with ~180 kg of $Li_{2}^{100}MoO_{4}$ crystals, AMoRE-II, is in preparation at the Yemi underground laboratory located at the Handuk iron mine in Jeongseon (Korea). In order to...
The radiopurity.org database has proven to be a valuable resource for the low background physics community as a tool to track and share assay results. The recent collaborative efforts between the Pacific Northwest National Laboratory and SNOLAB to modernize the database for the community will be described. Improvements to the searching capabilities, and data upload and update methods will be...
We study the status of the reactor antineutrino anomaly in light of recent reactor
flux models obtained with the conversion and summation methods. We present a
new improved calculation of the IBD yields of the standard Huber-Mueller (HM)
model and those of the new models. We show that the reactor rates and the fuel
evolution data are consistent with the predictions of the Kurchatov...
Accurate prediction of reactor antineutrino spectra is essential for current and future neutrino studies. A widely used approach to determine these spectra is via conversion of the corresponding cumulative beta spectra, which are obtained from experiment. Recent results from NRC Kurchatov Institute (KI) suggest that previous measurements of cumulative beta spectra from 235U and 238U were...
SNO+ is a multipurpose liquid scintillator neutrino detector located 2 km underground in Sudbury, Ontario, Canada. SNO+ has a rich program of neutrino physics including the study of reactor antineutrinos and geoneutrinos. We present the first detection of reactor antineutrinos in liquid scintillator at SNO+. Using 130 days of data, we extract constraints on neutrino oscillation parameters...
The antineutrino flux emitted from nuclear reactors is important for measuring neutrino
oscillations, probes of BSM physics with CEvNS and other interaction channels, and reactor
neutrino applications. Over the past decade, significant discrepancies have been uncovered
between the predicted and measured reactor antineutrino fluxes and energy spectra, motivating
the need for new...
The Jiangmen Underground Neutrino Observatory (JUNO), is under construction at Jiangmen, Guangdong, China. This experiment aims to study neutrino mass ordering with 3% energy resolution at 1MeV, a precise determination of neutrino oscillation parameters, and other neutrino physics with 20-kiloton liquid scintillator (LS) viewed by up to 20,000 high quantum efficiency (QE) 20-inch PMTs. The...
The RES-NOVA project will hunt neutrinos from core-collapse supernovae (SN) via coherent elastic neutrino-nucleus scattering (CEνNS) using an array of archaeological lead (Pb) based cryogenic detectors. The high CEνNS cross-section on Pb and the ultra-high radiopurity of archaeological Pb enable the operation of a high statistics experiment equally sensitive to all neutrino flavors...
The signature of the simultaneous capture of two K-shell electrons on the $^{124}$Xe and $^{126}$Xe nuclei with emission of two neutrinos is the detection of two K-shell X-rays and an Auger electron. Relaxation of the excited daughter atomic shell of Te by emitting two K X-ray quanta and an Auger electron is carried out with a probability of 0.734. Selection of such a complex event is possible...
Axions are a hypothetical particle which can help solve the strong CP problem in quantum chromodynamics and could be a possible dark matter candidate. Axions could be produced by $^{7}$Li nuclei in the sun and due to doppler broadening these axions could then be detected on earth using a source containing $^{7}$Li. In this poster, we report the results of a search for $^{7}$Li solar axions...
Reactor antineutrino detection technologies have advanced significantly in recent years, stemming from scientific investigations into the nature of the neutrino, which have necessitated technology innovations in new scintillators and detection methods. Since reactors are an enormous source of antineutrinos, the potential for antineutrino detectors being used in the reactor safeguards context...
EXO-200 is a single phase time projection chamber filled with liquid xenon enriched in $^{136}$Xe to 80.6$\%$ to search for its neutrinoless double beta decay ($0\nu\beta\beta$). EXO-200 stopped operation in Dec 2018 after two multi-year phases of successful operation. The complete dataset offers valuable opportunities for many interesting physics searches in addition to $0\nu\beta\beta$. Here...
This poster reports the results from a search for neutrino-induced neutral current (NC) resonant ∆(1232) baryon production followed by ∆ radiative decay in MicroBooNE. Data corresponding to MicroBooNE’s first three years of operations (6.80×10^20 protons on target) was used to select single-photon events with one or zero protons and without charged leptons in the final state. The background...
The identification of cosmic objects emitting high energy neutrinos provides new insights about the Universe and its active sources. The existence of cosmic neutrinos has been proven by the IceCube collaboration, but the big question of which sources these neutrinos originate from remains largely unanswered. The KM3NeT detector for Astroparticle Research with Cosmics in the Abyss (ARCA), is...
The IceCube Neutrino Observatory has detected a diffuse flux of high-energy astrophysical neutrinos in the TeV-PeV range. These neutrinos likely originate from extragalactic sources given their apparent isotropic distribution. Active Galactic Nuclei (AGN) form a class of astronomical objects which are promising neutrino source candidates given their high electromagnetic luminosity and...
Longstanding anomalies observed in short-baseline neutrino oscillation experiments have motivated an eV-scale sterile neutrino. Because of matter effects within the Earth, the existence of this particle would cause a deficit in the atmospheric and astrophysical muon neutrino flux at TeV energies for neutrinos crossing the Earth. We present the results of a search for an unstable sterile...
Search for low-energy Borexino's signals from fast radio bursts.
A.V. Derbin for the Borexino collaboration
The search for neutrino events in correlation with 42 most intense fast radio bursts (FRBs) has been performed using the Borexino data. We have searched for signals with visible energies above 250 keV within a time window of ±1000 s corresponding to the detection time of a particular...
Since 2015, the LIGO and Virgo collaborations have detected gravitational waves (GWs) from almost one hundred coalescences of compact objects (black holes and neutron stars). No neutrino counterparts have yet been clearly associated with these objects, across all energies from MeV to PeV. Such observation would greatly help in understanding the connection between the dynamics of the progenitor...
CUPID-0 is a pilot experiment in scintillating cryogenic calorimetry for the search of neutrino-less double beta decay. 26 ZnSe crystals coupled to bolometric light detectors were operated continuously for two years. From its successful experience comes a demonstration of full alpha to beta/gamma background separation, the most stringent limit on the 82Se neutrino-less double beta decay, as...
STEREO is a segmented, Gd-loaded liquid scintillator calorimeter that studied anti-neutrinos produced by the compact, highly $^{235}$U-enriched reactor core of the Institut Laue-Langevin in Grenoble (France). The experiment ran from 2016 to 2020 and was designed to test the light sterile neutrino explanation of the Reactor Antineutrino Anomaly (RAA) by comparing the neutrino energy spectra...
Sterile neutrinos could have any mass ranging from eV to the Plank scale. Out of this broad mass range, the keV-scale is one of the most interesting regions because it is a viable dark matter candidate and could provide a better explanation for low-structure astrophysical observations than other dark matter candidates. We are searching for a sterile neutrino in the 1 keV – 20 keV mass range...
The existence of dark matter (DM) has been well-established by repeated experiments probing various length scales. Even though DM is expected to make up 85% of the current matter content of the Universe, its nature remains unknown. One broad class of corpuscular DM motivated by Standard Model (SM) extensions is weakly interacting massive particles (WIMPs). WIMPs can generically have a non-zero...
Astrophysical neutrinos are capable of delivering unprecedented information about the most cataclysmic events in the Universe. Since neutrinos only interact weakly with matter and are not deflected by galactic/intergalactic magnetic fields, they point back to their production source and carry information relating to the in situ physical conditions of some of nature's most extreme environments....
The origin of astrophysical neutrinos at hundreds of TeV is still an open issue and an important step towards the understanding of the origin of cosmic rays. In this context, the real-time follow-up of neutrino events is a promising approach for the identification of the emitting objects. The imaging atmospheric Cherenkov telescopes (IACTs) – FACT, H.E.S.S., MAGIC and VERITAS – play a relevant...
The DUNE experiment is hosted by Fermi National Accelerator Laboratory at Chicago, IL, USA, the largest particle physics and accelerator laboratory in the United States. The DUNE experiment will send an intense neutrino beam 1300 kilometers through the earth from Fermilab to South Dakota. There, about 1.5 kilometers underground, a gigantic 70 kT liquid-argon neutrino detector, will analyze how...
Tokai to Kamioka (T2K) is an accelerator long baseline experiment that measures the neutrino oscillation parameters by observing $\nu_\mu$ ($\bar{\nu}_\mu$) disappearance and $\nu_e$ ($\bar{\nu}_e$) appearance from a nearly pure $\nu_\mu$($\bar{\nu}_\mu$) beam. The experiment has both near and far detectors situated at 280 m and 295 km respectively from the beam production target. The far...
We discuss the impact of neutral-current Non-Standard Interactions (NSIs) on the propagation of atmospheric neutrinos using future experiments, DUNE and HK as well as the future planned neutrino detectors, KNO and ORCA. We discuss the potential of these experiments to constrain the matter NSI parameters, assuming ten years of data taking of atmospheric neutrinos for...
We discuss the impact of the coupling of neutrinos with a new light neutral gauge boson, $Z^\prime$, with a mass of less than 500 MeV in meson decay and short-baseline neutrino experiments. Scenarios in which a light gauge boson is coupled to neutrinos are motivated within numerous contexts which are designed to explain various anomalies in particle physics and cosmology. This interaction...
Over the past decades, theories have predicted the existence of heavy compact objects containing an extremely dense form of exotic matter named Strange Quark Matter (SQM). This type of hypothetical matter is composed of nearly equal quantities of up, down and strange quarks and is supposed to be the ground state of Quantum Chromodynamics. Nuclearites are the massive component of SQM particles....
While optimized for detecting neutrinos in the multi-GeV and TeV region, IceCube is also capable of detecting the large flux of MeV neutrinos from Galactic Core Collapse Supernovae that stream through the detector. This is achieved by analyzing the collective enhancement of the PMT rate on top of a low dark rate in the cold and inert ice deep in the Antarctic Glacier. For sufficiently close...
A joint oscillation analysis of atmospheric neutrinos at Super-Kamiokande
(SK) and accelerator neutrinos at Tokai-to-Kamioka (T2K) is in preparation.
SK atmospheric neutrinos have sensitivity to neutrino mass ordering via matter
effects in the Earth, whereas accelerator neutrinos have stronger sensitivity to
the CP violation phase thanks to selective beam operation and low $\nu_e$...
Supernovae neutrinos serve as a direct probe of stellar interiors under extreme conditions. These neutrinos carry information important to open questions such as: the supernovae shock breakout mechanism, the stiffness of the nuclear equation of state, neutrino oscillation parameters and mass hierarchy, and much more. The next galactic supernova could produce hundreds to thousands of neutrino...
Proton Decay is one of the apparent consequences of Baryon Number Violation, as predicted in many Grand Unified Theories (GUTs). It could give an explanation to the asymmetry of matter and anti-matter in the universe. Among the experiments constructed to search for the clue of proton decays, Super-K has acquired the best results for many decay channels. For the channel p to ν and K+, Super-K...
Pacific Ocean Neutrino Experiment (P-ONE) is a proposed undersea neutrino detector with pathfinders already deployed, targeting a 70-string (1400 digital optical module) full deployment. By deploying in a deep-sea environment, scattering is reduced relative to in-ice experiments, allowing event resolutions at or below a tenth of a degree. Our current event simulation is based on methods...
In light of the success of the Skipper-CCD technology used for Dark Matter searches [1], its extension to neutrino detection becomes natural. CCDs are being used for reactor neutrino experiments and they have already shown their potential in constraining new physics models [2]. The perspective of a Skipper-CCD experiment to look for standard and beyond standard model physics has been recently...
The SuperNova Early Warning System is undergoing an upgrade (SNEWS2.0), with the goal of maximising the physics potential from the multi-messenger data of the next explosion. In particular, SNEWS2.0 aims to use the neutrino time-series observed by different experiments for triangulation as well as other physics analyses. The snewpdag software is being developed to process the data as it...
During a massive star’s death, ~99% of its energy is released in the form of neutrinos. Neutrinos of all flavors escape the core well before any light can. If detected, they can provide crucial information on stellar core collapse and its mechanisms. The SuperNova Early Warning System 2.0 (SNEWS 2.0) is a network of neutrino detectors around the globe that aim at detecting these neutrinos....
The recent studies of Plavin et al. (ApJ 894 (2020) 101, ApJ 908 (2021) 157) have
shown interesting evidence for an association between high energy neutrinos detected
by IceCube and radio-selected blazars. The catalog used in these analyses is an all sky
flux-limited complete sample of 3411 blazars selected according to their compact radio
flux density at 8 GHz. A search for a spatial...
FASER, the Forward Search Experiment, at the LHC aims to study neutrino interactions with the unexplored high energy range and to search for light, weakly-interacting new particles. The particle detector is placed at the LHC tunnel 480 m downstream of the ATLAS interaction point along the beam collision axis. The place is an ideal location to detect neutrinos since charged particles produced...
Neutrino Elastic scattering Observation with NaI (NEON) is an experiment to detect a coherent elastic neutrino-nucleus scattering (CEvNS) using reactor electron antineutrinos. NEON is based on an array of six NaI(Tl) crystals corresponding to a total mass of 15 kg, located at the tendon gallery of the Hanbit nuclear reactor that is 24 m far from the reactor core. The installation of the NEON...
The KATRIN collaboration aims to determine the neutrino mass with a
sensitivity of 0.2 eV/c2 (90 % CL). This will be achieved by measuring the endpoint region of the tritium β-electron spectrum. Combined analysis of the first two KATRIN measurement campaigns yielded a neutrino mass limit of mν ≤ 0.75 eV (90 % CL).
Analyses of data from the first five measurements...
The Jiangmen Underground Neutrino Observatory (JUNO) is a next-generation neutrino experiment under construction in China. Using 20 kilotons of liquid scintillators, its primary goal is to detect neutrinos from nuclear power plants and determine the neutrino mass ordering. As an observatory that will operate for the next few decades, it will also study interesting phenomena involving GeV...
The Karlsruhe Tritium Neutrino (KATRIN) experiment probes the effective electron anti-neutrino mass by a precision measurement of the tritium beta-decay spectrum near the endpoint. A world-leading upper limit of 0.8 eV (90 % CL) has been set with the first two measurement campaigns. New operational conditions for an improved signal-to-background ratio, the reduction of systematic uncertainties...
The LEGEND collaboration is pursuing the search for $0\nu\beta\beta$ decay in $^{76}$Ge with a tonne-scale experimental setup. Operating virtually background free (goal $0.6\,$cts/(FWHM$\cdot$t$\cdot$yr)) and with exceptional energy resolution on the per-mille level LEGEND will be able to push discovery sensitivity to unprecedented levels. A first 200$\,$kg stage is being completed at...
Neutrino-electron elastic scattering is a purely leptonic process whose cross section can be precisely calculated in the standard model. A measurement of this process can provide an in-situ constraint to the absolute neutrino flux in an accelerator-based $\nu_\mu$ beam. NOvA is a long-baseline neutrino experiment optimized to observe the oscillation of muon neutrinos to electron neutrinos....
Precise understanding of neutrino-nucleus cross sections is necessary for neutrino oscillation experiments to make accurate measurements of neutrino oscillation parameters, such as the CP violation phase $\delta_{CP}$, the mixing angle $\theta_{23}$, and the neutrino mass hierarchy. The NOvA Near Detector provides an excellent environment to make measurements of neutrino cross sections due to...
Stellar clusters are promising candidate sources of the most energetic cosmic rays produced in our Galaxy. Diffusive shock acceleration is expected to be efficient at the wind termination shock of the wind bubble inflated by these objects. Cosmic ray interactions in the wind bubble well as in the surrounding medium lead to the production of hadronic secondaries. Indeed, recent observations by...
This poster discusses recent developments concerning the MiniBooNE anomaly—an excess of low energy electronlike events in Fermilab's Booster Neutrino Beam. The latest results from the MicroBooNE collaboration disfavor an enhancement of low-energy electron neutrino interactions as the entire source of the MiniBooNE excess. However, a joint fit by the MiniBooNE collaboration, presented in this...
The Deep Underground Neutrino Experiment (DUNE) is a leading experiment in neutrino physics which is presently under construction. DUNE aims to measure the yet unknown parameters in the three flavor oscillation scenario which includes discovery of leptonic CP violation, determination of the mass hierarchy and determination of the octant of $\theta_{23}$. Additionally, the ancillary goals
of...
In-situ production of long-lived isotopes by cosmic muon interactions may generate a non-negligible background for deep underground rare event searches. The underground production of $^{77(m)}$Ge through fast neutron capture on $^{76}$Ge has been identified as the main in-situ cosmogenic background [1] in the future ton-scale experiment LEGEND-1000 [2] searching for $0\nu\beta\beta$ of...
The NEOS searches for sterile neutrinos by detecting reactor antineutrinos at a very short baseline in Korea. The NEOS detectors (1-ton Gd-LS) were deployed at the tendon gallery of the Hanbit reactor unit 5 (2.8 GW thermal power), 24 m away from the reactor core. In NEOS-I, the prompt energy spectrum from inverse-beta-decay was measured using 180 live-days of reactor-on data, which clearly...
As neutrino oscillation physics enters the precision era, the modeling of neutrino-nucleus interactions constitutes an increasingly challenging source of systematic uncertainty for new measurements. To confront such uncertainties, a new generation of detectors is being developed, which aim to measure the complete (exclusive) final state of particles resulting from neutrino interactions. In...
Neutrinos are generated via various physics processes in the Sun, such as nuclear fusion in the core, and solar flares due to the reconnection of magnetic field lines above sun spots. Those neutrinos provide information about neutrino properties, nuclear physics, and astrophysics. Super-Kamiokande (SK) is a multi-purpose water Cherenkov detector in Japan and studies neutrino interactions in...
Activated Carbon Fiber (ACF) is an adsorbent with a large specific surface area and a well-developed pore structure. ACF has micropores on its surface and thus has excellent adsorption speed. Because of its high adsorption speed, it is highly effective in adsorbing trace contaminants in a single pass.
Radon is one of the major common backgrounds in underground experiments, including solar...
The KM3NeT Collaboration is building and deploying two deep-sea Cherenkov detectors in the Mediterranean Sea. The primary goal of the KM3NeT/ARCA detector is neutrino astronomy in the TeV-PeV range, while the KM3NeT/ORCA detector is optimized for atmospheric neutrino oscillations studies at energies of a few GeV. When completed, KM3NeT/ARCA is expected to provide an unprecedented angular...
Left-right symmetric model is one of the simplest extensions of the Standard Model. Primarily proposed to account for parity violation it includes many novel features; one of them is the light neutrino mass generation through seesaw mechanism. As the leptonic Yukawa interactions in the Left-right symmetric lagrangian includes both Dirac and Majorana type couplings, the light neutrino mass in...
The origin of the relatively high solar system abundances of certain proton-rich isotopes in the $90 < A < 100$ mass range has been an enduring mystery in nuclear astrophysics. An attractive proposal to solve this problem is called the $\nu p$-process. This process could operate in a hot bubble of a core-collapse supernova, which is formed by a neutrino-driven outflow from the surface of the...
In recent years the study of neutrino properties has raised a lot of interests in the Particle and Astroparticle physics communities. The discovery of coherent elastic neutrino nucleus scattering (CE$\nu$NS), as new highly sensitive detection channel has unleashed an impressive discovery potential.
Cryogenic detectors are now proposed for the detection of astrophysical neutrino sources via...
T-violation in neutrino oscillations in vacuum is a well known fact. Due to the CPT theorem this fact is strictly connected with the CP violating phase in the neutrino mixing matrix. Since neutrino interaction with matter or external electromagnetic field violates Lorentz invariance, the influence of external conditions can lead to T violation even in the model with real mixing matrix, e.g. in...
T2K (Tokai to Kamioka) is a long-baseline neutrino oscillation experiment
located in Japan. One of the most challenging tasks of T2K is to determine
whether CP is violated in the lepton sector. By utilizing the near detector (ND280) data, T2K can constrain neutrino interaction and flux uncertainties by fitting a parametrised model to data.
This allows for a significant reduction of the...
This contribution describes a new experimental method for accelerator based neutrino experiments, called neutrino tagging. This technique consists in instrumenting a beam line with silicon trackers. Using these trackers, each neutrino originating from a $\pi^\pm \to \mu^\pm \nu$ decay can be reconstructed based on simple kinematic relations.
This reconstruction allows to precisely determine...
Based on our paper (arXiv:2201.06733) we discuss the prospects to take a picture of an extended neutrino source, i.e., resolving its angular luminosity distribution. This is challenging since neutrino directions cannot be directly measured but only estimated from the directions of charged particles they interact with in the detector material. This leads to an intrinsic blurring effect. We...
IceCube’s discovery of astrophysical neutrinos, and subsequent characterization of their energy spectrum up to a few PeV, has provided a new window to the high-energy Universe. A series of next-generation experiments aim to discover neutrinos with ultra-high energies, optimizing their sensitivity in the EeV range. However, many opportunities for discovery still remain in the study of the...
We present the results of the first simulation based analysis of tau neutrino events at the proposed magnetized Iron Calorimeter (ICAL) detector in the India Based Neutrino Observatory (INO) facility. We show that the detection capability of tau neutrinos is more than $3 \sigma$ confidence level for a period of 10 years. This analysis was performed by studying the combined sample of tau events...
A promising directional correlation between IceCube muon neutrino candidates
and a catalog of radio-bright blazars has been reported [ApJ 894 (2020) 101,
ApJ 908 (2021) 157]. The analysis presented in this contribution targets the
same radio catalog using the data collected by the ANTARES neutrino telescope
in 13 years of operation. In particular, a search for space and time clustering
of...
Fundamental symmetry such as the Lorentz Invariance (LI) may spontaneously break at Planck scales in some unified theories. In a low energy effective field theory, such as the Standard Model, Violations of LI (VLI) can manifest itself perturbatively. Such Planck-suppressed VLI signals can affect the mass induced neutrino oscillations at accessible energy ranges and induce spectral changes by...
The MAJORANA DEMONSTRATOR experiment is an array of high-purity germanium detectors searching for neutrinoless double-beta decay in $^{76}$Ge. The combined strengths of the MAJORANA experiment and the complementary approach taken by the GERDA experiment have successfully demonstrated the feasibility of the next-generation $^{76}$Ge experiment called LEGEND. The LEGEND program has adopted a new...
The CUPID-Mo experiment, located in the Laboratoire Souterrain de Modane (France) is a demonstrator for the next generation 0νββ experiment CUPID. The experiment is an array of 20 enriched Li$_2$$ ^{100}$MoO$_4$ bolometers and 20 Ge light detectors, working at ~ 20 mK. The experiment has collected data from spring 2019 to summer 2020, for a total exposure of 2.71 kg.yr and set a leading limit...
The BeEST (Beryllium Electron capture in Superconducting Tunnel junctions) experiment searches for keV-scale sterile neutrinos via high precision measurements of eV-scale nuclear recoils and energy-momentum reconstruction method in the electron capture (EC) decay of $^{7}$Be. $^{7}$Be atoms are directly implanted into superconducting tunnel junction (STJ) sensors that can measure the energy of...
The Online Scintillator Internal Radioactivity Investigation System (OSIRIS) is a 20-ton liquid scintillator detector currently under construction at the Jiangmen underground neutrino observatory (JUNO) located at the Kaiping Neutrino Research Center in Kaiping, China. OSIRIS features 75 newly developed, intelligent PMTs (iPMTs) surrounding a cylindrical acrylic vessel embedded in a Cherenkov...
The Jiangmen Underground Neutrino Observatory (JUNO) is the state of the art, liquid scintillator (LS) based, large neutrino detector. Due to the large 20 kt LS target mass with the tight requirements on its optical and radio-purity properties, it will be able to perform leading measurements detecting reactor, terrestrial and astrophysical neutrinos. Central detector (CD) of JUNO adopts the...
The CUORE (Cryogenic Underground Observatory for Rare Events) experiment is a ton-scale detector $ ^{[1]} $, operating at a cryogenic temperature around 10 mK, searching for neutrinoless double-beta decay of $ ^{130}\rm{Te} $ and other rare events. It owns today's largest milli-Kelvin infrastructure in the world $ ^{[2]} $. We envision an upgrade of the CUORE cryostat in order to host the...
The possibility for a new type of neutrino detector, a “hybrid Cherenkov-scintillation detector,” which observes and discriminates Cherenkov light from scintillation light, has become a reality with a myriad of new technological approaches. One of these approaches, the “dichroicon’”, is a Winston-style light concentrator made from dichroic mirrors which sort photons by wavelength, separating...
The detection of high-energy neutrinos in the EeV range requires new detection techniques in order to cope with the small expected flux. The radio detection method, utilizing Askaryan emission, can be used to detect these neutrinos in polar ice. The propagation of the radio pulses has to be modeled carefully in order to reconstruct the energy, direction and flavor of the neutrino from the...
The Standard Model of particle physics is in remarkable agreement with most experimental data so far. However, a lot of questions remain unanswered, such as the origin of neutrino masses or the need for extra sources of CP violation. Possible solutions rest on scalar sector extensions, popular beyond-the-Standard-Model scenarios. The addition of scalar triplets is an attractive possibility,...
The HUNTER experiment (Heavy Unseen Neutrinos from Total Energy-momentum Reconstruction) uses missing-mass reconstruction of electron-capture beta decays to search for sterile neutrinos with masses in the 20-280 keV range. We detect electron-capture decays of radioactive 131-Cs atoms, contained in a magneto-optical (laser) trap. The decay produces only low-energy products, which will be...
Long-baseline (LBL) neutrino oscillation experiments search for Charge-Parity (CP) violation in the leptonic sector by precisely measuring the $\nu_\mu\to\nu_e$ and $\overline{\nu}_\mu\to\overline{\nu}_e$ appearance probabilities.
One of the dominant systematic uncertainties on the measurements of CP violation, comes from our modeling of the $\nu_e/\overline{\nu}_e$ cross-section ratio, which...
The Liquid Argon (LAr) instrumentation of the neutrinoless double-beta decay experiment LEGEND-200 builds on its precursor [1] operated in the completed GERDA experiment. Thanks to its efficient background recognition capabilities, it was pivotal to search for neutrinoless double-beta decays of $^{76}$Ge quasi-free of background events [2]. An improved version has been developed and is...
Extracting particle physics properties from neutrinoless double-beta (0𝜈𝛽𝛽) decay, requires a detailed understanding of the involved nuclear structures. Still, modern calculations of the corresponding nuclear matrix elements (NMEs) differ by factors 2-3.
The high momentum transfer of Ordinary Muon Capture (OMC) provides insight into highly excited states similar to those that contribute...
Neutrino oscillations are a natural consequence of the fact that the neutrinos have nonzero masses. Until now, most parameters related to the mixing matrix and the neutrino mass differences have been measured with different degrees of precision. In this poster we make a geometrical model for understanding neutrino oscillations and the origin of their mass eigenvalues. In this model, the mixing...
In July 2020, Super-Kamiokande (SK) loaded 0.011% of gadolinium to enhance the detection efficiency of neutron signals and restarted the observation as “SK-Gd experiment”. One of the purpose of SK-Gd experiment is understanding the supernova mechanism as well as the star formation history by detecting Supernova Relic Neutrinos (SRNs). To detect SRNs in SK-Gd experiment, it is necessary to...
We present the scientific case and R&D status of The Selena Neutrino Experiment. The Selena Neutrino Experiment will consist of imaging sensors made from an ionization target layer of amorphous selenium (aSe) coupled to a silicon complementary metal-oxide-semiconductor (CMOS) active pixel array for charge readout. The high spatial resolution in a solid-state target provides unparalleled...
Neutrino astronomy is among the most promising fields for astro- and particle physics. Measuring astrophysical neutrinos and identifying their sources might shed light on the physics involved in the highest energy objects in the universe. However, measuring elusive neutrinos with large-volume telescopes requires high-precision understanding of the detector and its optical medium. The...
The Short Baseline Neutrino Program aims to discover, or definitely rule out, the existence of sterile neutrinos at the eV mass scale by means of Liquid Argon TPCs along the Booster Neutrino Beamline. In order to mitigate the background induced by cosmic muons, the Far Detector (ICARUS-T600) is instrumented with a 4pi Cosmic Ray Tagging system. The Cosmic Ray Tagging system is composed of...
Thermal MeV neutrino emission from core-collapse supernovae offers a unique opportunity to probe physics beyond the Standard Model in the neutrino sector.
The next generation of neutrino experiments such as DUNE and Hyper-Kamiokande provide can detect over $10^5$ neutrinos in the event of a Galactic supernova. As supernova neutrinos propagate to Earth, they may interact with the local dark...
The main source of systematic uncertainty on neutrino cross section measurements at the GeV scale is represented by the poor knowledge of the initial flux. The goal of cutting down this uncertainty to 1% can be achieved through the monitoring of charged leptons produced in association with neutrinos, by properly instrumenting the decay region of a conventional narrow-band neutrino beam. Large...
Core-collapse supernovae emit their gravitational energy as neutrino. So far, some studies calculated the emission in case neutron stars are left behind. In the case of black holes, neutrino is also emitted from the surrounding matter. However, the Misner-Sharp metric, which is often employed in simulations, diverges when black holes form. To evade the problem, we are developing a new...
NOvA is a long-baseline neutrino experiment studying neutrino oscillations with Fermilab’s NuMI beam. The experiment consists of two functionally identical detectors formed from plastic extrusions filled with a liquid scintillator. Convolution networks have previously been used to determine neutrino flavor in both the near and far detectors and observe the disappearance of muon neutrinos and...
The TRISTAN (TRitium Investigation on STerile to Active Neutrino mixing) detector aims at searching for keV-sterile neutrinos in the full beta decay spectrum of tritium using a novel detector system at the KATRIN experiment.
This detector will consist of more than 1000 Silicon Drift Detector (SDD) pixels, arranged in so-called detector modules. The SDD modules are now in production and the...
The Karlsruhe Tritium Neutrino (KATRIN) experiment aims to determine the effective electron anti-neutrino mass with a sensitivity down to 0.2 eV/c$^2$ (90% CL) through spectroscopy of gaseous tritium beta-decay in the endpoint region. This challenging goal can only be reached through a precise examination of all systematic effects of the experiment. One of these effects is caused by a plasma...
We make an attempt to explore type-III seesaw by taking $A_4$ modular symmetry in super-symmetric context. In addition, we have included local $U(1)_{B-L}$ symmetry which eventually helps us to avoid certain unwanted terms in the superpotential. Hitherto, the seesaw being type-III meaning it involves fermion triplet superfields $\Sigma$, along with which, we have included a singlet weighton...
Isomer $^{83m}$Kr of stable $^{83}$Kr emits monoenergetic conversion electrons that represent a unique calibration tool in the KATRIN experiment. In contrast to other monoenergetic electron sources, like electron gun, $^{83m}$Kr as a gas may be homogeneously mixed with tritium. The conversion electrons then undergo similar effects as the β-electrons from tritium decay. It allows for...
The era of experimental neutrino astronomy was open with our measurement of SN1987A, that provided valuable information of neutrino emission, even with few dozens of events reported by different detectors. This data was vastly explored in the literature and given the low statistics, unbinned statistical methods are invoked to fit supernova emission models precisely. In this work, we use...
We forecast constraints on neutrino decay via capture of the Cosmic Neutrino Background (CνB) on tritium, with emphasis on the PTOLEMY-type experiment. Although direct observations of the CνB are still in their very early stages, future direct observations of the CνB will impose significant constraints on a neutrino lifetime in the region of the age of the universe. We discuss the would-be...
CHANDLER is an antineutrino detection technology based on a 3D segmented lattice of plastic scintillating cubes to enable surface-level deployment. Our prototype detector, MiniCHANDLER, observed an antineutrino signal via inverse beta decay at 5.5$\sigma$ significance with no overburden and minimal shielding. In this poster, we will discuss upgrades to the MiniCHANDLER detector and look at...
The next core-collapse supernova (CCSN) in the Milky Way presents a once-in-a-lifetime opportunity to obtain detailed measurements on the explosion of a star and the extreme conditions found within its core. Local CCSNe are exceedingly rare, so it is critical that as much information is captured from the event as is possible. The high-intensity neutrino burst from a CCSN, which may arrive at...
Multi-wavelength observations of different core-collapse Supernovae (SNe) have confirmed the presence of dense Circumstellar Material (CSM) around the progenitor star. The CSM is formed as a result of high mass loss of the progenitor star a few years prior to its death. Interaction of this CSM with high energy particles created in supernova explosion can produce secondary particles like high...
