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arXiv 1602.08707hep-ph
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约束最小和次最小超对称性情形下的Higgs分支比

Higgs Branching Ratios in Constrained Minimal and Next-to-Minimal Supersymmetry Scenarios Surveyed

C. Beskidt, W. de Boer, D. I. Kazakov, S. Wayand

摘要:

在CMSSM中,最重的标量和赝标量希格斯玻色子大部分衰变为b夸克和τ轻子,因为残余密度有利于大的$\tanβ$值。在NMSSM中,可能的衰变模式的数量要丰富得多。除了类似CMSSM的情形外,重希格斯玻色子玻色子的衰变优先进入顶夸克对(如果运动学允许的话)、较轻的希格斯玻色子玻色子或中性伴子,导致不可见的衰变。我们提供了一个扫描NMSSM参数空间投影的希格斯扇区的三维空间的希格斯质量的6D参数空间,以确定的范围内的分支比作为希格斯玻色子质量的函数,所有希格斯玻色子。提出了具体的LHC基准点,这些基准点代表了NMSSM的显著特征。

英文摘要:

In the CMSSM the heaviest scalar and pseudo-scalar Higgs bosons decay largely into b-quarks and tau-leptons because of the large $\tanβ$ values favored by the relic density. In the NMSSM the number of possible decay modes is much richer. In addition to the CMSSM-like scenarios, the decay of the heavy Higgs bosons is preferentially into top quark pairs (if kinematically allowed), lighter Higgs bosons or neutralinos, leading to invisible decays. We provide a scan over the NMSSM parameter space to project the 6D parameter space of the Higgs sector on the 3D space of the Higgs masses to determine the range of branching ratios as function of the Higgs boson mass for all Higgs bosons. Specific LHC benchmark points are proposed, which represent the salient NMSSM features.

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