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T: Fachverband Teilchenphysik

T 116: Neutrinos Legend, Neutrino Theory

T 116.4: Talk

Thursday, March 23, 2023, 16:35–16:50, POT/0251

Neutrino Decay in JUNO — •George Parker, Marcel Büchner, Tim Charisse, Arshak Jafar, Joachim Kopp, Kai Loo, Oliver Pilarczyk, and Michael Wurm — Johannes Gutenberg Universität Mainz, Mainz, Germany

The decay of the neutrino mass eigenstates are well-constrained using astrophysical neutrinos, with the exception of neutrino mass eigenstate ν3, which has a much less stringent lifetime bound. In this work, we explore the sensitivity of the Jiangmen Underground Neutrino Experiment (JUNO) to ν3-decay. JUNO is a next-generation reactor neutrino liquid-scintillator detector with enhanced flavour sensitivity, exceptional energy resolution and high statistics, which operates on a medium-baseline and could be uniquely tuned to uncover evidence of neutrino decay. We consider the signature of ν3-decay on the neutrino oscillation spectrum in the case of (1) invisible decay, where the daughter states are not observable; and (2) visible decay, where the daughter states are active neutrinos. We comment on how neutrino decay models can be embedded into larger consistent theories.