h -> mu tau and muon g-2 in the alignment limit of two-Higgs-doublet model
h -> mu tau and muon g-2 in the alignment limit of two-Higgs-doublet model
复制标题
h -> mu tau 和 muon g-2 在双希格斯双峰模型的对齐极限中
DOI：
10.1016/j.nuclphysb.2017.03.013
复制
发表时间：
2017
影响因子：
2.8
通讯作者：
Han Xiao-Fang
中科院分区：
文献类型：
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作者：
Wang Lei;Yang Shuo;Han Xiao-Fang
我们在双希格斯双重态模型的精确对准极限下研究了h→μ τ和μ子g−2。在这种情况下，类SM希格斯粒子与SM粒子的耦合在树水平上与SM中的希格斯粒子的耦合相同，并且不存在树水平的违反轻子风味的耦合hμτ。我们假设CMS观测到的违反轻子风味的μτ过量分别来自其他中性希格斯粒子H和A，它们在125 GeV下几乎与类sm希格斯粒子简并。通过对精确电弱数据、b介子衰变、τ衰变和希格斯粒子搜索的相关理论约束和实验约束，我们发现μ子g−2异常和μτ超标有利于非类sm希格斯粒子在125 GeV左右的小轻子汤川耦合和上汤川耦合，而轻子违反味耦合对另一个重中性希格斯粒子敏感。此外，如果μτ过剩来自于125 GeV左右的H，则重希格斯粒子衰变为μτ的实验数据倾向于m A> 230 GeV，并具有相对较大的H¯t耦合。
We examine the h→ μ τ and muon g− 2 in the exact alignment limit of two-Higgs-doublet model. In this case, the couplings of the SM-like Higgs to the SM particles are the same as the Higgs couplings in the SM at the tree level, and the tree-level lepton–flavor–violating coupling hμτ is absent. We assume the lepton–flavor–violating μτ excess observed by CMS to be respectively from the other neutral Higgses, H and A, which almost degenerates with the SM-like Higgs at the 125 GeV. After imposing the relevant theoretical constraints and experimental constraints from the precision electroweak data, B-meson decays, τ decays and Higgs searches, we find that the muon g− 2 anomaly and μτ excess favor the small lepton Yukawa coupling and top Yukawa coupling of the non-SM-like Higgs around 125 GeV, and the lepton–flavor–violating coupling is sensitive to another heavy neutral Higgs mass. In addition, if the μτ excess is from H around 125 GeV, the experimental data of the heavy Higgs decaying into μτ favor m A> 230 GeV for a relatively large H t¯ t coupling.