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arXiv 1303.0168hep-ph
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Higgs玻色子搜索数据对具有软破缺$Z_2$对称性的双Higgs二重态模型的意义

Implications of Higgs boson search data on the two-Higgs doublet models with a softly broken $Z_2$ symmetry

Cheng-Wei Chiang, Kei Yagyu

摘要:

基于大型强子对撞机上希格斯玻色子玻色子研究的数据,我们对两个希格斯玻色子模型的参数空间进行了约束,并采用软破缺的$Z_2$对称性来避免在树水平上改变中性流的味道.在标准模型费米子的$Z_2$电荷分配下,有四种Yukawa相互作用。我们发现,第二类汤川相互作用的模型可以更好地解释所有的实验数据。在这种情况下,轻CP偶希格斯玻色子玻色子$h$与弱规范玻色子的耦合几乎与标准模型相似,或者仅在小范围的$\tanβ$内略有不同。特别是,我们仔细检查了以前被其他分析忽略的约束良好的区域,并研究了大型强子对撞机上额外的希格斯玻色子玻色子的现象学。

英文摘要:

Based on current data of the Higgs boson search at the Large Hadron Collider, we constrain the parameter space of the two-Higgs doublet models where a softly broken $Z_2$ symmetry is employed to avoid flavor-changing neutral currents at tree level. There are four types of Yukawa interactions under the $Z_2$ charge assignments of the standard model fermions. We find that the model with type-II Yukawa interactions can better explain the experimental data among all. In this scenario, the couplings of the light CP-even Higgs boson $h$ with weak gauge bosons are almost standard model-like or only slightly different in a small range of $\tanβ$. In particular, we scrutinize a well-constrained region previously ignored by other analyses and study the phenomenology of the extra Higgs bosons at the Large Hadron Collider.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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