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

TL;DR

This paper explores how charged lepton flavor violation could be linked to the muon g-2 anomaly, analyzing collider and low-energy experiment sensitivities to new bilepton physics beyond the Standard Model.

Contribution

It extends previous studies by evaluating the potential of current and future collider and precision experiments to detect bileptons related to CLFV and muon g-2 discrepancy.

Findings

LHC data can probe new parameter space for CLFV bileptons.

Future experiments like MACE and muonium-antimuonium conversion are sensitive to these effects.

Collider processes such as $pp o ext{dileptons}$ provide promising detection channels.

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 $pp\to\gamma^*/Z^*\to \ell_1^\pm \ell_1^\pm \ell_2^\mp \ell_2^\mp$.