Search for BSM particles from high energy supernova neutrinos
- Date
- January 10 (Fri) at 14:00 - 15:15, 2025 (JST)
- Speaker
-
- Kensuke Akita (JSPS Research Fellow, Graduate School of Science, The University of Tokyo)
- Language
- English
- Host
- Shigehiro Nagataki
Light hypothetical particles with masses up to O(100) MeV can be produced in the core of supernovae. Their subsequent decays to neutrinos can produce a flux component with higher energies than the standard flux. We study the impact of heavy neutral leptons, Z′ bosons, in particular U(1)Lμ−Lτ and U(1)B−L gauge bosons, and majorons coupled to neutrinos flavor-dependently. We obtain new strong limits on these particles from no events of high-energy SN 1987A neutrinos and their future sensitivities from observations of galactic supernova neutrinos.
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