Revisiting lepton-specific 2HDM in light of muon g−2 anomaly
Revisiting lepton-specific 2HDM in light of muon g−2 anomaly
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根据 μ 子 g−2 异常重新审视轻子特异性 2HDM
DOI：
10.1016/j.physletb.2018.11.045
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Y. Zhang
中科院分区：
文献类型：
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作者：
L. Wang;J. M. Yang;M. Zhang;Y. Zhang
我们在各种理论和实验限制下，特别是在LHC的直接搜索限制和早期宇宙中强一级相变的要求下，研究了轻子特异的2 HDM作为μ子g− 2异常的解决方案。我们发现，在理论、精确的电弱数据、125 GeV的Higgs数据、轻子/半强子τ衰变、轻子Z衰变和Br（B s→ μ+ μ−）。从h→ AA通道的直接搜索可以对Br（h→ AA）施加严格的上限，而多轻子事件搜索可以大幅度缩小m A和tan δ β的允许范围（10 GeV< m A< 44 GeV和32< tan δ β< 60）。最后，我们发现该模型可以在14 GeV< m A< 25 GeV，310 GeV< m H< 355 GeV和250 GeV< m H±< 295 GeV的范围内产生强的一级相变，这是μ子g− 2异常的解释所允许的。
We 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, 10 GeV< m A< 65 GeV, 260 GeV< m H< 620 GeV and 180 GeV< m H±< 620 GeV 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 (B s→ μ+ μ−). The direct searches from the h→ A A channels can impose stringent upper limits on Br (h→ A A) and the multi-lepton event searches can sizably reduce the allowed region of m A and tan β (10 GeV< m A< 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< m A< 25 GeV, 310 GeV< m H< 355 GeV and 250 GeV< m H±< 295 GeV, allowed by the explanation of the muon g− 2 anomaly.