Probing the Standard Model with Higgs signal rates from the Tevatron, the LHC and a future ILC
Probing the Standard Model with Higgs signal rates from the Tevatron, the LHC and a future ILC
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DOI：
10.1007/jhep11(2014)039
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发表时间：
2014-03
影响因子：
5.4
通讯作者：
P. Bechtle;S. Heinemeyer;O. Stål;T. Stefaniak;G. Weiglein
中科院分区：
文献类型：
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作者：
P. Bechtle;S. Heinemeyer;O. Stål;T. Stefaniak;G. Weiglein
我们利用Tevatron和LHC实验的最新信号率测量，在系统研究Higgs耦合标度因子（κ）基准场景中，探索了标准模型（SM）Higgs玻色子耦合结构可能存在的偏差。我们采用与HiggsSignals进行的χ 2拟合，该拟合考虑了信号效率的详细信息以及理论和实验不确定性的主要相关性。所有考虑的情况下允许额外的非标准希格斯玻色子衰变模式，并讨论了各种假设约束的总衰变宽度。在任何调查的基准场景中，没有发现从SM希格斯玻色子耦合结构的显着偏差。我们推导出上限的一个额外的（不可检测的）希格斯衰变模式的假设下，希格斯耦合到弱规范玻色子不超过SM预测。我们还讨论了未来的设施探测偏离SM希格斯耦合的能力，比较高光度升级的大型强子对撞机与未来的国际直线对撞机（ILC），后者的各种能量和光度的情况下被认为是。在ILC模型无关的耦合结构的测量可以进行，我们提供的精度，可以实现的估计。
We explore the room for possible deviations from the Standard Model (SM) Higgs boson coupling structure in a systematic study of Higgs coupling scale factor (κ) benchmark scenarios using the latest signal rate measurements from the Tevatron and LHC experiments. We employ χ 2 fits performed with HiggsSignals, which takes into account detailed information on signal efficiencies and major correlations of theoretical and experimental uncertainties. All considered scenarios allow for additional non-standard Higgs boson decay modes, and various assumptions for constraining the total decay width are discussed. No significant deviations from the SM Higgs boson coupling structure are found in any of the investigated benchmark scenarios. We derive upper limits on an additional (undetectable) Higgs decay mode under the assumption that the Higgs couplings to weak gauge bosons do not exceed the SM prediction. We furthermore discuss the capabilities of future facilities for probing deviations from the SM Higgs couplings, comparing the high luminosity upgrade of the LHC with a future International Linear Collider (ILC), where for the latter various energy and luminosity scenarios are considered. At the ILC model-independent measurements of the coupling structure can be performed, and we provide estimates of the precision that can be achieved.