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arXiv 0710.5331hep-ph
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希格斯玻色子在复合体MSSM中的衰变

Higgs boson decays in the Complex MSSM

K. E. Williams, G. Weiglein

摘要:

对LEP的希格斯搜索结果的分析表明,不能排除MSSM参数空间中具有非零复相位的一部分,其中最轻的中性希格斯玻色子玻色子h_1的质量仅为45 GeV,第二轻的中性希格斯玻色子玻色子h_2具有相当大的分支分数,分为一对h_1态。给出了Higgs级联衰变h_2 -> h_1h_1的完整单圈结果,并结合了来自FeynHiggs程序的双圈Higgs传播子修正。利用改进的理论预言分析了LEP拓扑截面的极限,证实了低Higgs质量下非排斥区的存在。真正的顶点校正的大小和形状的这个区域上的效果进行了讨论。

英文摘要:

The analysis of the Higgs search results at LEP showed that a part of the MSSM parameter space with non-zero complex phases could not be excluded, where the lightest neutral Higgs boson, h_1, has a mass of only about 45 GeV and the second lightest neutral Higgs boson, h_2, has a sizable branching fraction into a pair of h_1 states. Full one-loop results for the Higgs cascade decay h_2 --> h_1 h_1 are presented and combined with two-loop Higgs propagator corrections taken from the program FeynHiggs. Using the improved theoretical prediction to analyse the limits on topological cross sections obtained at LEP, the existence of an unexcluded region at low Higgs mass is confirmed. The effect of the genuine vertex corrections on the size and shape of this region is discussed.

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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