Charged lepton flavor violation in light of the muon magnetic moment anomaly and colliders

Abstract

Any observation of charged lepton flavor violation (CLFV) implies the existence of new physics beyond the SM in charged lepton sector. CLFV interactions may also contribute to the muon magnetic moment and explain the discrepancy between the SM prediction and the recent muon $g-2$ precision measurement at Fermilab. We consider the most general SM gauge invariant Lagrangian of $\Delta L=0$ bileptons with CLFV couplings and investigate the interplay of low-energy precision experiments and colliders in light of the muon magnetic moment anomaly. We go beyond previous work by demonstrating the sensitivity of the LHC, the MACE experiment, a proposed muonium-antimuonium conversion experiment, and a muon collider. Currently-available LHC data is already able to probe unexplored parameter space via the CLFV process $pp\to {\gamma }^{\ast }/Z^{\ast }\to {\ell }_1^{\pm }{\ell }_1^{\pm }{\ell }_2^{\mp }{\ell }_2^{\mp }$.

arXiv comment21 pages, 4 figures, 4 tables. version accepted by EPJC

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