Measurements of the Higgs boson width and anomalous HVV couplings from on-shell and off-shell production in the four-lepton final state
Measurements of the Higgs boson width and anomalous HVV couplings from on-shell and off-shell production in the four-lepton final state
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DOI：
10.1103/physrevd.99.112003
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发表时间：
2019-01
影响因子：
5
通讯作者：
Cms Collaboration
中科院分区：
文献类型：
--
作者：
Cms Collaboration
本文介绍了四轻子最终态上壳和离壳希格斯玻色子产生的研究，使用的数据来自大型强子对撞机的CMS实验，对应于在13 TeV质心能量下的综合光度为80.2 fb−1。对希格斯玻色子的总宽度和表示其与两个电弱矢量玻色子异常耦合的参数设置了联合约束。这些结果与在质心能量为7和8 TeV处收集的数据相结合，对应的综合光度分别为5.1和19.7 fb−1。来自衰变粒子和相关喷流的运动学信息使用矩阵元素技术相结合，以确定产生机制，并增加对产生和衰变中希格斯玻色子耦合的灵敏度。在壳上和壳外区域，异常高压耦合的约束条件与标准模型期望一致。在与标准模型相似的耦合结构假设下，希格斯玻色子宽度被约束为3.2+2.8−2.2 MeV，而基于模拟的期望约束为4.1 +5.0−4.0 MeV。宽度的限制仍然与测试的异常HVV相互作用相似。”发表于《物理评论D》，doi:10.1103/ physrev .99.112003.“c©2019 CERN，用于CMS合作。CC-BY-4.0许可*参见附录A的合作成员列表。[au:] [au:] [au:] [au：
Studies of on-shell and off-shell Higgs boson production in the four-lepton final state are presented, using data from the CMS experiment at the LHC that correspond to an integrated luminosity of 80.2 fb−1 at a center-of-mass energy of 13 TeV. Joint constraints are set on the Higgs boson total width and parameters that express its anomalous couplings to two electroweak vector bosons. These results are combined with those obtained from the data collected at center-of-mass energies of 7 and 8 TeV, corresponding to integrated luminosities of 5.1 and 19.7 fb−1, respectively. Kinematic information from the decay particles and the associated jets are combined using matrix element techniques to identify the production mechanism and to increase sensitivity to the Higgs boson couplings in both production and decay. The constraints on anomalous HVV couplings are found to be consistent with the standard model expectation in both the on-shell and off-shell regions. Under the assumption of a coupling structure similar to that in the standard model, the Higgs boson width is constrained to be 3.2+2.8 −2.2 MeV while the expected constraint based on simulation is 4.1 +5.0 −4.0 MeV. The constraints on the width remain similar with the inclusion of the tested anomalous HVV interactions. ”Published in Physical Review D as doi:10.1103/PhysRevD.99.112003.” c © 2019 CERN for the benefit of the CMS Collaboration. CC-BY-4.0 license ∗See Appendix A for the list of collaboration members ar X iv :1 90 1. 00 17 4v 2 [ he pex ] 2 2 Ju n 20 19