首页> 外文学位 >A Search for Lepton-Flavor-Violating Decays of the 125 GeV Higgs Boson with Hadronically Decaying Tau Leptons in the 20.3 fb--1 , ps = 8 TeV Dataset Collected in 2012 by the ATLAS Detector at the Large Hadron Collider.

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A Search for Lepton-Flavor-Violating Decays of the 125 GeV Higgs Boson with Hadronically Decaying Tau Leptons in the 20.3 fb--1 , ps = 8 TeV Dataset Collected in 2012 by the ATLAS Detector at the Large Hadron Collider.

机译：在大强子对撞机上由ATLAS探测器于2012年收集的20.3 fb--1 ps = 8 TeV数据集，用于搜索125 GeV希格斯玻色子的轻子-风味破坏衰变，并具有Tau轻子衰变。

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This dissertation presents a search for lepton-flavor-violating (LFV) decays of the 125 GeV Higgs boson in final states of mutauhad and tauhad in the full dataset collected by the ATLAS detector in 2012. The search is based on data samples of proton-proton collisions at [special characters omitted] = 8 TeV, corresponding to an integrated luminosity of 20.3 fb--1. The topology of LFV events is exploited through an optimized selection of objects and events, with signal and control regions defined by event kinematics. A binned likelihood fit searching for the presence of LFV Higgs decays is performed using the reconstructed Higgs boson mass as the discriminating variable. No such decays are observed. The expected (observed) upper limits at 95% confidence on the branching ratios for the muon and electron final states are found to be Br(H → mutau) = 1.24% (1.85%) and Br(H → tau) = 2.07% (1.81%).

机译：本文提出了在2012年ATLAS探测器收集的完整数据集中，对mutauhad和tauhad最终状态下125 GeV希格斯玻色子的轻子风味违反（LFV）衰变的搜索。该搜索基于质子[省略特殊字符] = 8 TeV时的质子碰撞，对应于20.3 fb--1的综合亮度。 LFV事件的拓扑结构是通过对对象和事件的优化选择来开发的，信号和控制区域由事件运动学定义。使用重构的希格斯玻色子质量作为判别变量，执行查找LFV希格斯衰变存在的分类似然拟合。没有观察到这种衰减。对μ子和电子最终态的支化率的置信度为95％时，预期的（观察到的）上限为Br（H→mutau）= 1.24％（1.85％）和Br（H→tau）= 2.07％（ 1.81％）。

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作者
Clarke, Robert Najem.;
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University of California, Berkeley.;

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授予单位 University of California, Berkeley.;
学科 High energy physics.;Physics.
学位 Ph.D.
年度 2016
页码 232 p.
总页数 232
原文格式 PDF
正文语种 eng
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A Search for Lepton-Flavor-Violating Decays of the 125 GeV Higgs Boson with Hadronically Decaying Tau Leptons in the 20.3 fb--1 , ps = 8 TeV Dataset Collected in 2012 by the ATLAS Detector at the Large Hadron Collider.

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