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arXiv · 2511.09619

$L_\mu-L_\tau$ gauge bosons in beam dumps and supernovae

Nikita Blinov·Patrick J. Fox·Kevin J. Kelly·Ryan Plestid·Tao Zhou
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Abstract

We study the phenomenology of a sub-GeV $L_\mu-L_\tau$ gauge boson. We find discrepancies with existing literature in sensitivity projections for the upcoming SHiP experiment and in the treatment of supernovae cooling constraints. We present a quantitative analysis of different production modes in beam dumps and compare our results to previous work. In the context of supernovae, we re-evaluate the standard supernova cooling bounds from SN1987A and analyze additional supernova-based probes: diffusive cooling, constraints from the existence of low-energy supernovae, and the absence of a high-energy neutrino signal from SN1987A.

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Nikita Blinov, Patrick J. Fox, Kevin J. Kelly, Ryan Plestid, Tao Zhou. 2025-11-12. $L_\mu-L_\tau$ gauge bosons in beam dumps and supernovae. https://arxiv.org/abs/2511.09619

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