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Probing light mediators at the MUonE experiment
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abstract
The MUonE experiment, that aims to provide a precise measurement of the hadronic vacuum polarization contribution to the muon $g-2$ via elastic muon-electron scattering, has also the potential to explore the parameter space of light new physics. Exploiting the process $\mu^- N \to \mu^- N X$, where $N$ is the target nucleus and X is a new physics light mediator, we demonstrate that MUonE can be sensitive to new regions of parameter space for sub-GeV dark photons. In particular, thanks to its muon beam, MUonE will be able to explore uncharted parameter space regions for the $L_\mu-L_\tau$ model. Finally, we also find that MUonE can probe the parameter space of axion-like particles for different assumptions of the couplings to electrons, muons and photons.
Forward citations
Cited by 2 Pith papers
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Filling the Gap: Hunting for Vector Bosons at the MUonE Experiment with Displaced Decay Signature
MUonE's displaced-vertex search, combining muon-electron and muon-nucleus production, could probe vector-boson mediators up to ~150 MeV and close a documented parameter-space gap.
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Constraining the Secluded and Catalyzed Annihilation Dark Matter with Fermi-LAT and Planck Data
A full four-body final-state treatment of secluded and catalyzed dark matter annihilation weakens Fermi-LAT and Planck limits, reopening parameter space for scalar, fermion, and vector dark matter in two portal models.
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