First Glimpses at Higgs’ face
First Glimpses at Higgs’ face
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DOI：
10.1007/jhep12(2012)045
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发表时间：
2012-07
影响因子：
5.4
通讯作者：
J. Espinosa;C. Grojean;M. Mühlleitner;M. Trott
中科院分区：
文献类型：
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作者：
J. Espinosa;C. Grojean;M. Mühlleitner;M. Trott
刚刚公布的8 TeV LHC Higgs搜索数据表明存在质量约为125 GeV的标量共振。我们研究了ATLAS，CMS和Tevatron合作报告的数据对理解这个标量的性质的影响，通过对其与其他标准模型（SM）粒子的耦合进行联合拟合。我们讨论和表征这种共振在多大程度上具有SM希格斯粒子的性质，并考虑可以在（大部分）模型独立的方式提取新物理学的影响。我们发现，如果希格斯耦合到费米子和弱矢量玻色子被允许不同于他们的标准值，SM是~ 2σ从最佳拟合点到当前的数据。拟合到一个可能的不可见衰变分支比，我们发现BR inv = 0.05±0.32（95%CL）。我们还讨论和开发了一些使用数据的方法，以约束或排除模型，显着修改此标量共振的属性，并将这些技术应用到当前的全球数据集。
The 8 TeV LHC Higgs search data just released indicates the existence of a scalar resonance with mass~ 125 GeV. We examine the implications of the data reported by ATLAS, CMS and the Tevatron collaborations on understanding the properties of this scalar by performing joint fits on its couplings to other Standard Model (SM) particles. We discuss and characterize to what degree this resonance has the properties of the SM Higgs, and consider what implications can be extracted for New Physics in a (mostly) model-independent fashion. We find that, if the Higgs couplings to fermions and weak vector bosons are allowed to differ from their standard values, the SM is~ 2σ from the best fit point to the current data. Fitting to a possible invisible decay branching ratio, we find BR inv≃ 0.05±0.32 (95% CL). We also discuss and develop some ways of using the data in order to bound or rule out models which modify significantly the properties of this scalar resonance, and apply these techniques to the current global dataset.