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Testing the 2HDM explanation of the muon g-2 anomaly at the LHC
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abstract
The discrepancy between the measured value and the Standard Model prediction for the muon anomalous magnetic moment is one of the important issues in the particle physics. In this paper, we consider a two Higgs doublet model (2HDM) where the extra Higgs doublet couples to muon and tau in lepton flavor violating (LFV) way and the one-loop correction involving the scalars largely contributes to the muon anomalous magnetic moment. The couplings should be sizable to explain the discrepancy, so that the extra Higgs bosons would dominantly decay into $\mu\tau$ LFV modes, which makes the model testable at the LHC through multi-lepton signatures even though they are produced via the electroweak interaction. We discuss the current status and the future prospect for the extra Higgs searches at the LHC, and demonstrate the reconstruction of the mass spectrum using the multi-lepton events.
Forward citations
Cited by 2 Pith papers
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A $\mu$-$\tau$-philic Higgs doublet confronted with the muon g-2, $\tau$ decays and LHC data
A mu-tau-philic second Higgs doublet can fit both the muon g-2 and tau LFU anomalies, but LHC searches require the new CP-even Higgs mass above 560 GeV.
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Higgs lepton flavor violating decays in Two Higgs Doublet Models
A mini-review explaining that the type-III two Higgs doublet model can produce h to tau mu branching ratios near the present CMS bound while remaining compatible with tau to mu gamma and related flavor constraints.
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