The simple interpretations of lepton anomalies in the lepton-specific inert two-Higgs-doublet model

Abstract

There exist about $3.7\sigma$ positive and $2.4\sigma$ negative deviations in the muon and electron anomalous magnetic moments ($g-2$). Also, some ratios for lepton universality in $\tau$ decays have almost $2\sigma$ deviations from the Standard Model. In this paper, we propose a lepton-specific inert two-Higgs-doublet model. After imposing all the relevant theoretical and experimental constraints, we show that these lepton anomalies can be explained simultaneously in many parameter spaces with $m_H>200$ GeV and $m_A(m_{H^{\pm }})>500$ GeV for appropriate Yukawa couplings between leptons and inert Higgs. The key point is that these Yukawa couplings for $\mu$ and $\tau$/$e$ have opposite sign.

arXiv comment5 pages, 3 figures, some discussions and references added, accepted by Physical Review D

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