Muon Anomalous Magnetic Moment and Lepton Flavor Violation

Abstract

A non-universal interaction, which involves only the third family leptons induces lepton flavor violating couplings and contributes to the anomalous magnetic moment of muon. In this paper, we study the effects of non-universal interaction on muon (g-2) and rare decay $\tau \to \mu \gamma$ by using an effective lagrangian technique, and a phenomenological $Z^{\prime }$ model where $Z^{\prime }$ couples only to the third family lepton. We find that the deviation from the theory can be explained and the induced $\tau \to \mu \gamma$ rate could be very close to the current experimental limit. In the $Z^{\prime }$ model, $M_{Z^{\prime }}$ has to be lighter than 2.6 TeV.

references added, the version to appear in PRD

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• τ^- \to μ^- π^0(η,η') Decays in New Physics Scenarios beyond the Standard Model
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• Kaluza-Klein Theories and the Anomalous Magnetic Moment of the Muon
• The $(g-2{)}_{\mu }$ anomaly, Higgs bosons and heavy neutrinos
• Muon anomalous magnetic moment due to the brane-stretching effect