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 neutrinos, which have access to a wide range of energies and baselines, can break this degeneracy. The large difference between the matter densities in the mantle and core of the Earth critically impacts the oscillation probabilities of the atmospheric neutrinos. Therefore, observations of core-passing atmospheric neutrinos and antineutrinos would be a potential tool to discriminate between these two BSM-physics scenarios. Using detector simulations of the Iron Calorimeter (ICAL) detector at the India-based Neutrino Observatory (INO), we show that such a distinction is indeed possible. Further, we demonstrate the advantage of incorporating the charge identification capability at an atmospheric neutrino detector like ICAL for discriminating between these two new physics scenarios.
|Collaboration||India-based Neutrino Observatory|