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arXiv · 2502.18175

Muon-Decay Parameters from COHERENT

Víctor Bresó-Pla·Sergio Cruz-Alzaga·Martín González-Alonso·Suraj Prakash
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Abstract

We demonstrate that measurements of Coherent Elastic Neutrino-Nucleus Scattering (CE$ν$NS) at spallation sources are valuable probes of muon-decay physics. Using COHERENT data we derive the first direct constraint on the Michel parameters governing the $\barν_μ$ energy distribution. We also discuss future sensitivities, the implications for the Lorentz structure of the interactions mediating muon decay and the application to other neutrino-production mechanisms like pion decay.

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Víctor Bresó-Pla, Sergio Cruz-Alzaga, Martín González-Alonso, Suraj Prakash. 2025-10-04. Muon-Decay Parameters from COHERENT. https://doi.org/10.1103/mlhl-v822

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