The Korean Physical Society 06130 22, Teheran-ro 7-gil, Gangnam-gu, Seoul, Republic of Korea 610 Representation : Tae Won NOH TEL: 02-556-4737 FAX: 02-554-1643 E-mail : webmaster@kps.or.kr Copyright(C) KPS, All rights reserved.
30 May 2022 to 4 June 2022
Virtual Seoul
Asia/Seoul timezone

Dark sectors in neutrons-shining-through-a-wall and nuclear absorption in neutrino facilities

Not scheduled
5m
Virtual Seoul

Virtual Seoul

Poster Other Poster

Speaker

Nirmal Raj (TRIUMF National Lab)

Description

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 experiment and would provide the strongest laboratory constraints on the neutron-dark neutron mixing for a wide range of mass splittings. Considering also dark neutrons as dark matter, I show that their nuclear absorption at deep-underground detectors such as SNO and Borexino places some of the strongest limits. Finally,
I describe other signatures, such as neutrons shining through walls at spallation sources, reactors, and the disappearance of ultracold neutrons.

Primary author

Nirmal Raj (TRIUMF National Lab)

Co-authors

Prof. Maxim Pospelov (U Minnesota) Matheus Hostert (Perimeter Institute) David McKeen (TRIUMF )

Presentation Materials