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Mauricio Bustamante (CCAPP, OSU)

Date: Tue. March 21st, 2017, 11:00 am-12:00 pm
Location: Miller Room

Prospecting for new physics with high-energy astrophysical neutrinos

High-energy astrophysical neutrinos, recently discovered by IceCube, are fertile ground to look for new physics.  Due to the high neutrino energies — tens of TeV to a few PeV — we can look for new physics at unexplored energies.  Due to their cosmological-scale baselines — Mpc to Gpc — tiny new-physics effects, otherwise unobservable, could accumulate and become detectable.  Possibilities include neutrino decay, violation of fundamental symmetries, and novel neutrino-neutrino interactions.  I will show that the spectral features, angular distribution, and flavor composition of neutrinos could reveal the presence of new physics and, to an extent, its type.  I will pay special attention to neutrino decay and show that IceCube can, with present-day data, already improve limits on neutrino lifetime by several orders of magnitude.  In the future, more statistics, advances in detection techniques, and detector upgrades will enhance the sensitivity.
Page last modified: March 9, 2017