Description
The discovery of non-zero neutrino masses invites one to consider BSM signals related to the origin of the neutrino mass. In particular, we will explore two scenarios, the decay of heavier neutrinos into the lighter one and pseudo-Dirac neutrinos. Both scenarios involve slow dynamical neutrino processes, therefore, to observe those signals it requires low energy neutrino flux that propagates longer distances. We will consider two sources, neutrinos from a Core Collapse Supernova (CCSN) and the diffuse supernova neutrino background (DSNB). In both cases, the flux is at the MeV scale and the neutrinos propagates distances on the order on ~10kpc (~Gpc) in the case of CCSN (DSNB). Next generation projects, including Hyper-Kamiokande and DUNE, are expected to collect data samples with hundreds of events from both fluxes. By a quantitative study of how well CCSN and DSNB will be measured by the upcoming large neutrino detectors, we analyze the simulate data in order to estimate the sensitivity to the neutrino lifetime and the possibility that neutrinos are pseudo-Dirac fermions.
Organised by
Cora Dvorkin