Searching keV to TeV dark matter by neutron star temperature and supernova neutrinos

by Yen-Hsun Lin (Academia Sinica)

Thursday 28 Oct 2021, 16:00 → 16:30 Australia/Sydney

The dark matter (DM) captured by the neutron star (NS) can result in the heating on the NS surface temperature due to the DM annihilation and the kinetic process. Such heating can make the NS temperature deviating from the prediction of the standard cooling mechanism and be used to constrain various phenomenological models with DM mass ranging from O(100) MeV to TeV and heavier. However, for DM mass lighter than O(100) MeV, the Pauli blocking makes the DM heating irrelevant so that other means of probing such DM candidates are called for. Here we present a new approach of searching for DM in the Milky Way and nearby galaxies boosted by the supernova (SN) neutrinos. The associated boosted DM (BDM) shall carry sufficient kinetic energy to be detected by the water Cherenkov detector such as Super-Kamiokande or the upcoming Hyper-Kamiokande detectors. I will discuss how SN BDM provides a new way to probe DM lighter than MeV and extended to DM even lighter than keV.