# XIX International Workshop on Neutrino Telescopes

18-26 February 2021
Online
Europe/Rome timezone

## Astrophysical Neutrino Decay

22 Feb 2021, 17:30
20m

### Room2

Parallel Contributed Talk Neutrino Telescopes and Multimessenger

### Speaker

Peter Denton (Brookhaven National Laboratory)

### Description

Neutrino decay modifies neutrino propagation in a unique way; not only is there flavor changing as there is in neutrino oscillations, there is also energy transport from initial to final neutrinos. The most sensitive direct probe of neutrino decay is currently IceCube which can measure the energy and flavor of neutrinos traveling over extragalactic distances. For the first time we calculate the flavor transition probability for the cases of visible and invisible neutrino decay,including the effects of the expansion of the universe, and consider the implications for IceCube. As an example, we demonstrate how neutrino decay addresses a tension in the IceCube data.

### Primary author

Peter Denton (Brookhaven National Laboratory)

### Presentation Materials

 Astrophysical Neutrino Decay Denton_Astro_Nu_Decay.pdf