Revisiting lepton-specific 2HDM in light of muon g-2 anomaly

Publication date: Available online 29 November 2018Source: Physics Letters BAuthor(s): Lei Wang, Jin Min Yang, Mengchao Zhang, Yang ZhangAbstractWe examine the lepton-specific 2HDM as a solution of muon g−2 anomaly under various theoretical and experimental constraints, especially the direct search limits from the LHC and the requirement of a strong first-order phase transition in the early universe. We find that the muon g-2 anomaly can be explained in the region of 32<tan⁡β<80, 10GeV<mA<65GeV, 260GeV<mH<620GeV and 180GeV<mH±<620GeV after imposing the joint constraints from the theory, the precision electroweak data, the 125 GeV Higgs data, the leptonic/semi-hadronic τ decays, the leptonic Z decays and Br(Bs→μ+μ−). The direct searches from the h→AA channels can impose stringent upper limits on Br(h→AA) and the multi-lepton event searches can sizably reduce the allowed region of mA and tan⁡β (10 GeV <mA< 44 GeV and 32 <tan⁡β< 60). Finally, we find that the model can produce a strong first-order phase transition in the region of 14 GeV <mA< 25 GeV, 310 GeV <mH< 355 GeV and 250 GeV <mH±< 295 GeV, allowed by the explanation of the muon g−2 anomaly.
Source: Physics Letters B - Category: Physics Source Type: research
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