Ninetta Saviano "[HET seminar] HE Neutrinos beyond Standard Model: steriles and secret interactions"

Wednesday 2 Dec 2020, 14:30 → 15:30 US/Eastern

https://bluejeans.com/767813754

"Ultra High Energy cosmogenic neutrinos may represent a unique opportunity

to unveil possible new physics interactions in the neutrino sector.   At

this regard, we have investigated the effects on high and ultrahigh energy

active neutrino fluxes due to active-sterile secret interactions mediated

by a new pseudoscalar particle.  These interactions become relevant at

very different energy scales depending on the masses of the scalar

mediator and of sterile neutrino. As  a consequence,  we have found

interesting phenomenological implications  on two benchmark fluxes we

consider, namely an astrophysical power law flux, in the range below 100

PeV, and a cosmogenic flux, in the Ultrahigh energy range.

semin_sem_brookhaven.pdf