Heavy sterile neutrino emission in core-collapse supernovae: constraints and signatures

  title={Heavy sterile neutrino emission in core-collapse supernovae: constraints and signatures},
  author={Leonardo Mastrototaro and Alessandro Mirizzi and Pasquale Dario Serpico and Arman Esmaili},
  journal={arXiv: High Energy Physics - Phenomenology},
Heavy sterile neutrinos with masses ${\mathcal O}(100)$ MeV mixing with active neutrinos can be produced in the core of a collapsing supernova (SN). In order to avoid an excessive energy loss, shortening the observed duration of the SN 1987A neutrino burst, we show that the active-sterile neutrino mixing angle should satisfy $\sin^2 \theta \lesssim 5 \times 10^{-7}$. For a mixing with tau flavour, this bound is much stronger than the ones from laboratory searches. Moreover, we show that in the… 
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