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arXiv 1408.1682hep-ex
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用顶夸克对寻找希格斯玻色子玻色子的关联产生

Search for the associated production of the Higgs boson with a top-quark pair

CMS Collaboration

摘要:

利用质心能量分别为7 TeV和8 TeV的pp碰撞中收集到的积分亮度分别高达5.1和19.7的数据样本,对与顶夸克对(t tbar H)相关的标准模型希格斯玻色子玻色子进行了研究.搜索是基于以下希格斯玻色子玻色子衰变的特征:H衰变为强子,H衰变为光子,H衰变为轻子。结果的特征在于观察到的t tbar H信号强度相对于标准模型的横截面,μ = sigma/sigma[SM],假设希格斯玻色子衰变的预期在标准模型。对于质量为125.6 GeV的希格斯玻色子玻色子,最佳拟合值为mu = 2.8 +/- 1.0。

英文摘要:

A search for the standard model Higgs boson produced in association with a top-quark pair (t tbar H) is presented, using data samples corresponding to integrated luminosities of up to 5.1 inverse femtobarns and 19.7 inverse femtobarns collected in pp collisions at center-of-mass energies of 7 TeV and 8 TeV respectively. The search is based on the following signatures of the Higgs boson decay: H to hadrons, H to photons, and H to leptons. The results are characterized by an observed t tbar H signal strength relative to the standard model cross section, mu = sigma/sigma[SM], under the assumption that the Higgs boson decays as expected in the standard model. The best fit value is mu = 2.8 +/- 1.0 for a Higgs boson mass of 125.6 GeV.

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