Description:

Sterile neutrinos constitute one of the simplest solutions to explain the origin of neutrino masses.  They can be easily produced in the hot and dense core of a core-collapse supernova (SN). The standard bounds on their interactions, from SN arise from SN1987A energy-loss argument. I'll first discuss the physics of the cooling bound and its implementation for two different cases i.e. production through mass-mixing with active neutrinos or through a dipole portal.  I'll discuss a novel bound on the sterile neutrino parameter space arising from the energy deposition and the observed population of under luminous SN-IIP, which can reach parameter space two orders of magnitude lower than the SN1987A energy-loss argument.

 Garv Chauhan, Postdoctoral Associate, Virginia Tech

Host: Innes Bigaran