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Global fits in the Georgi-Machacek model

机译:全局符合Georgi-Machacek模型

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Off the beaten track of scalar singlet and doublet extensions of the Standard Model, triplets combine an interesting LHC phenomenology with an explanation for neutrino masses. The Georgi-Machacek model falls into this category, but it has never been fully explored in a global fit. We use the HEPfit package to combine recent experimental Higgs data with theoretical constraints and obtain strong limits on the mixing angles and mass differences between the heavy new scalars as well as their decay widths. We also find that the current signal strength measurements allow for a Higgs to vector boson coupling with an opposite sign to the Standard Model, but this possibility can be ruled out by the lack of direct evidence for heavy Higgs states. For these hypothetical particles, we identify the dominant decay channels and extract bounds on their branching ratios from the global fit, which can be used to single out the decay patterns relevant for the experimental searches.
机译:在标准模型的标量单重态和双峰态扩展的人迹罕至的地方,三胞胎将有趣的LHC现象学与对中微子质量的解释结合在一起。 Georgi-Machacek模型属于此类,但从未在全球范围内对其进行全面探索。我们使用HEPfit软件包将最新的实验希格斯数据与理论约束相结合,并获得了对重型新标量之间的混合角和质量差以及其衰减宽度的严格限制。我们还发现,当前的信号强度测量值允许使用希格斯矢量玻色子耦合,且与标准模型的符号相反,但是由于缺乏直接证明希格斯状态的证据,因此可以排除这种可能性。对于这些假设的粒子,我们确定了主要的衰变通道,并从全局拟合中提取了它们的分支比率的界线,这些界线可用于选择与实验搜索相关的衰变模式。

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