Nagoya University
Theoretical Elementary Particle Physics Laboratory

Date&Time Wed Nov 17 2021 (14:00 - 15:00)
Juntaro Wada
Affiliation Univ. of Tokyo
Title Probing the Lμ-Lτ Gauge Boson at the MUonE Experiment
Abstract This talk is based on our recent paper arXiv:2109.10093. The MUonE collaboration intends to assess the hadronic vacuum polarization contribution to the muon g-2 via the elastic scattering process μe→μe. I will discuss the prospects of probing the Lμ−Lτ gauge boson at the MUonE experiment. The Lμ−Lτ gauge boson Z′, which can explain the reported muon g-2 discrepancy, can be produced at the MUonE experiment through the process μe→μeZ′. The background events coming from the elastic scattering μe→μe as well as radiative process μe→μeγ can be removed by the kinematical cuts on the muon scattering angle and the electron energy, in addition to a photon veto. With our selection criteria, the number of signal events μe→μeZ′ is found to be as large as ∼10^3 in the parameter region motivated by the muon g−2 discrepancy. Our result shows that the MUonE experiment is also sensitive to new physics and therefore it can serve a double purpose.
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