Limits on heavy neutral leptons, $Z^{\prime }$ bosons and majorons from high-energy supernova neutrinos

Kensuke Akita, Sang Hui Im, Mehedi Masud +1

Light hypothetical particles with masses up to $\mathcal{O}(100)\mathrm{MeV}$ can be produced in the core of supernovae. Their subsequent decays to neutrinos can produce a flux comp…