KEK Theory Meeting on Particle Physics Phenomenology (KEK-PH2023)

Kensuke Akita "Supernova 1987A limits on heavy neutral leptons and U(1)Lμ−Lτ gauge bosons from the high-energy tail of neutrino fluxes"

9 Nov 2023, 10:40

25m

Kobayashi Hall (KEK)

Short talks

Description

Light hypothetical particles 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 discuss limits on light particles decaying to neutrinos flavor-dependently from supernovae using this flux modification. In particular, we will obtain limits on heavy neutral leptons (HNLs) and ${\mathrm{U}(1)}_{L_{\mu }-L_{\tau }}$ gauge bosons from SN 1987A and future galactic supernovae.

Presentation materials

KEK-PH2023_Akita Kensuke Akita.pdf