High-energy neutrino signals from supernova explosions: a new window into dark photon parameter space

TL;DR

This paper proposes that high-energy neutrinos from supernovae could reveal the existence of dark photons in the 200-400 MeV mass range, offering a new astrophysical method to explore physics beyond the Standard Model.

Contribution

It introduces a novel astrophysical signal—high-energy neutrinos from dark photon decay during supernovae—to probe previously unexplored dark photon parameter space.

Findings

Dark photon decay can produce neutrinos exceeding supernova energies.

The neutrino signal is robust against supernova profile variations.

This method complements existing accelerator and astrophysical searches.

Abstract

Dark photons, hypothetical feebly interacting massive vector bosons, appear in many extensions of the Standard Model. This study investigates their production and subsequent decay during supernova explosions. We demonstrate that the decay of dark photons, with masses ranging from 200 to 400 MeV, can lead to the emission of neutrinos with energies surpassing those emitted by supernovae. These neutrinos therefore serve as a distinct signal of new physics, allowing for the exploration of previously uncharted regions of the dark photon parameter space and complementing both accelerator-based searches and other astrophysical constraints. The signal is largely unaffected by the specifics of the supernova's temperature and density radial profiles outside the SN core, rendering the prediction both robust and model-independent. Our results indicate that searching for high-energy neutrinos accompanying supernova explosions provides a novel approach to probe physics beyond the Standard Model, including dark photons, heavy neutral leptons, and other feebly interacting particles with masses in the hundreds of MeV range.