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arXiv 1506.01010hep-ex
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矢量玻色子融合衰变到b bbar产生的标准模型希格斯玻色子的研究

Search for the standard model Higgs boson produced through vector boson fusion and decaying to b bbar

CMS Collaboration

摘要:

第一次搜索报告的标准模型希格斯玻色子(H),通过矢量玻色子融合和衰变到底夸克对。两个数据样本,对应于积分亮度的19.8反femtobarns和18.3反femtobarns的质子-质子碰撞在sqrt(s)= 8 TeV的选择为这个通道在欧洲核子研究中心的LHC。在这些数据样本中,在125 GeV的质量下,H到b bbar信号的观测显著性为2.2标准差,而预期显著性为0.8标准差。拟合的信号强度mu = sigma/sigma[SM] = 2.8 + 1.6 - 1.4。这个结果与其他CMS搜索衰变为b夸克对的希格斯玻色子的结果相结合,产生了1.0 +/- 0.4的信号强度,对应于质量为125 GeV的希格斯玻色子的2.6标准差的信号显著性。

英文摘要:

A first search is reported for a standard model Higgs boson (H) that is produced through vector boson fusion and decays to a bottom-quark pair. Two data samples, corresponding to integrated luminosities of 19.8 inverse femtobarns and 18.3 inverse femtobarns of proton-proton collisions at sqrt(s) = 8 TeV were selected for this channel at the CERN LHC. The observed significance in these data samples for a H to b bbar signal at a mass of 125 GeV is 2.2 standard deviations, while the expected significance is 0.8 standard deviations. The fitted signal strength mu = sigma/sigma[SM] = 2.8 + 1.6 - 1.4. The combination of this result with other CMS searches for the Higgs boson decaying to a b-quark pair, yields a signal strength of 1.0 +/- 0.4, corresponding to a signal significance of 2.6 standard deviations for a Higgs boson mass of 125 GeV.

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