43rd SLAC Summer Institute

Supernova keV Sterile Neutrinos

Not scheduled

15m

Kavli Auditorium (SLAC)

Aug/18

Speaker

Vedran Brdar (JGU Mainz)

Description

We consider the production of keV sterile neutrinos in the cooling phase of the Supernova. A matter enhanced conversion from active to sterile neutrino is analyzed, leading to a strong bound on the sterile neutrino ${\sin }^{2}2\theta -m_{\text{sterile}}$ parameter space from Supernova energy loss. In addition, we analyzed the impact of the standard production mechanism via interactions which is small compered to the aforementioned MSW. We also consider ${\nu }_s\to {\nu }_a\gamma$ loop process, with respect to a possible observable photon signal, and obtain a limit using data from satellites which are sensitive in the MeV photon energy range.