Enhanced diphoton signal of the Higgs boson and the muon g−2 in gauge mediation models
Enhanced diphoton signal of the Higgs boson and the muon g−2 in gauge mediation models
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DOI：
10.1016/j.physletb.2012.09.005
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发表时间：
2012-08
影响因子：
4.4
通讯作者：
R. Sato;K. Tobioka;N. Yokozaki
中科院分区：
文献类型：
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作者：
R. Sato;K. Tobioka;N. Yokozaki
我们在规范介导的超对称破缺模型中研究了希格斯玻色子的双光子信号，该模型可以解释约125 GeV的希格斯玻色子质量和μ子g−2实验的结果。我们考虑了规范中介模型的两种可能的扩展：包含类矢量物质，以及信使和上型希格斯粒子之间的混合。在这两种情况下都会引起大的左右混合状态，导致双光子信号增强。我们包含了电荷破缺最小值的约束，这对于大的左右混合状态是严重的。在能够解释希格斯玻色子质量约为125 GeV和μ子g−2的参数空间区域内，h→γγ的分支分数可以比标准模型希格斯玻色子分支分数大20-30%。
We study the diphoton signal of the Higgs boson in gauge mediated supersymmetry breaking models, which can explain both the Higgs boson mass of around 125 GeV and the result of the muon g−2 experiment. We consider two possible extensions of gauge mediation models: inclusion of vector-like matters, and a mixing between a messenger and the up-type Higgs. The large left–right mixing of staus is induced in both scenarios, resulting in the enhanced diphoton signal. We include a constraint from a charge breaking minimum, which is severe for the large left–right mixing of staus. The branching fraction of h→γγ can be about 20–30% larger than that of the Standard Model Higgs boson, in the region of parameter space where the Higgs boson mass of around 125 GeV and the muon g−2 are explained.