Speaker
Kensuke Akita
(University of Tokyo)
Description
Light hypothetical particles with masses up to $\mathcal{O}(100)$ 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 $U(1)_{L_\mu−L_\tau}$ and ${\rm U}(1)_{B−L}$ 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.
| Related Papers/Preprints | 2312.13627 |
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Primary author
Kensuke Akita
(University of Tokyo)
