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arXiv · 2312.13627

Limits on heavy neutral leptons, $Z'$ bosons and majorons from high-energy supernova neutrinos

Kensuke Akita·Sang Hui Im·Mehedi Masud·Seokhoon Yun
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Abstract

Light hypothetical particles with masses up to $\mathcal{O}(100)\ {\rm MeV}$ 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 ${\rm U(1)}_{L_\mu-L_\tau}$ 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.

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Kensuke Akita, Sang Hui Im, Mehedi Masud, Seokhoon Yun. 2023-12-21. Limits on heavy neutral leptons, $Z'$ bosons and majorons from high-energy supernova neutrinos. https://arxiv.org/abs/2312.13627

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