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arXiv 2402.02822hep-phhep-ex
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希格斯玻色子对完整LHC Run 1和Run 2数据的精确分析

Higgs Boson Precision Analysis of the Full LHC Run 1 and Run 2 Data

Yongtae Heo, Dong-Won Jung, Jae Sik Lee

AI总结:

对LHC Run 1和Run 2完整希格斯数据进行全局拟合,发现汤川耦合比标准模型低约2σ,而规范-希格斯耦合与标准模型一致,并有助于解释H→Zγ信号强度的超额。

摘要:

我们对希格斯玻色子耦合进行了全局拟合,使用了在LHC上收集的完整希格斯数据集,每个实验的积分亮度在7 TeV下约为5/fb,在8 TeV下为20/fb,在13 TeV下高达139/fb。我们的综合分析基于本工作中使用的实验信号强度以及为我们的分析而精心设计的理论信号强度,能够可靠地重现文献中的结果。我们发现,考虑到多个超越标准模型的动机良好的模型中发现的广泛而全面的CP守恒和CP破坏情景,LHC希格斯精确数据不再由标准模型希格斯玻色子最佳描述。特别是在本工作考虑的大多数拟合中,我们观察到归一化汤川耦合的最佳拟合值比相应的标准模型值低约2σ,1σ误差为3%-5%。另一方面,规范-希格斯耦合与标准模型一致,1σ误差为2%-3%。顺便提一下,降低的汤川耦合有助于解释ATLAS和CMS合作组最近报告的H→Zγ信号强度2.2±0.7的超额。

英文摘要:

We perform global fits of the Higgs boson couplings to the full Higgs datasets collected at the LHC with the integrated luminosities per experiment of approximately 5/fb at 7 TeV, 20/fb at 8 TeV, and up to 139/fb at 13 TeV. Our combined analysis based on the experimental signal strengths used in this work and the theoretical ones elaborated for our analysis reliably reproduce the results in the literature. We reveal that the LHC Higgs precision data are no longer best described by the SM Higgs boson taking account of extensive and comprehensive CP-conserving and CP-violating scenarios found in several well-motivated models beyond the SM. Especially, in most of the fits considered in this work, we observe that the best-fitted values of the normalized Yukawa couplings are about $2σ$ below the corresponding SM ones with the $1σ$ errors of 3%-5%. On the other hand, the gauge-Higgs couplings are consistent with the SM with the $1σ$ errors of 2%-3%. Incidentally, the reduced Yukawa couplings help to explain the excess of the $H\to Zγ$ signal strength of $2.2\pm 0.7$ recently reported by the ATLAS and CMS collaborations.

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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