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arXiv · 2202.08843

Dark Photons and Displaced Vertices at the MUonE Experiment

Iftah Galon·David Shih·Isaac R. Wang
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Abstract

MUonE is a proposed experiment designed to measure the hadronic vacuum polarization contribution to muon $g-2$ through elastic $\mu-e$ scattering. As such it employs an extremely high-resolution tracking apparatus. We point out that this makes MUonE also a very promising experiment to search for displaced vertices from light, weakly-interacting new particles. We demonstrate its potential by showing how it has excellent sensitivity to dark photons in the mass range $10~\mathrm{MeV} \le m_{A'} \le 100~\mathrm{MeV}$ and kinetic mixing parameter $10^{-5} \le \epsilon e \le 10^{-3}$, through the process $\mu^{\pm}\, e^- \to \mu^{\pm}\, e^-\, A'$ followed by $A'\to e^+e^-$.

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Iftah Galon, David Shih, Isaac R. Wang. 2022-02-17. Dark Photons and Displaced Vertices at the MUonE Experiment. https://doi.org/10.1103/physrevd.107.095003

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