State of the Universe

Exclusion limit on Dark Matter-Neutrino Scattering Cross-section

by Dr. Divya Sachdeva (IISER, Pune)

Friday, November 26, 2021 from to (Asia/Kolkata)
at Zoom Link : Meeting ID: 825 1295 6967 Passcode: 384194
In this talk, I will discuss the strong new limits on the Dark Matter (DM)-Neutrino scattering crosssection for DM of mass less than 10 MeVs obtained using data from the Super-Kamiokande (SK) experiment. The key ingredient leading to this result is the observation that the diffused supernovae neutrinos flux and the cosmic electron flux are comparable in the energy range 1 - 50 MeV providing a significant boost to the cold DM particles and hence lead to an observable amount of signal in the SK energy range. Though we used SK as well as XENON1T data to derive bounds on DM-electron and DM-neutrino scattering cross-section, we found that the SK experiment provides the strongest constraint on DM-neutrino interaction.