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arXiv 1606.02181hep-ex
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用ATLAS探测器寻找8次TeV $pp$碰撞中矢量玻色子融合产生的标准模型希格斯玻色子

Search for the Standard Model Higgs boson produced by vector-boson fusion in 8 TeV $pp$ collisions and decaying to bottom quarks with the ATLAS detector

ATLAS Collaboration

摘要:

利用${fb}^{-1}$的LHC质子-质子碰撞数据,在$\sqrt{s}$ = 8 TeV的条件下,用ATLAS探测器对标准模型希格斯玻色子进行了搜索.该信号被搜索作为一个共振的不变质量分布的一对喷流包含$b$ -强子在矢量玻色子融合候选事件。对于质量为125 GeV的希格斯玻色子,测得的产额是$-0.8 \pm 2.3$乘以标准模型的横截面。在95%置信水平下,发现横截面乘以分支比的上限是标准模型横截面的4.4倍,与仅背景(标准模型生产)假设中的预期限值5.4(5.7)一致。

英文摘要:

A search with the ATLAS detector is presented for the Standard Model Higgs boson produced by vector-boson fusion and decaying to a pair of bottom quarks, using 20.2 ${fb}^{-1}$ of LHC proton-proton collision data at $\sqrt{s}$ = 8 TeV. The signal is searched for as a resonance in the invariant mass distribution of a pair of jets containing $b$-hadrons in vector-boson-fusion candidate events. The yield is measured to be $-0.8 \pm 2.3$ times the Standard Model cross-section for a Higgs boson mass of 125 GeV. The upper limit on the cross-section times the branching ratio is found to be 4.4 times the Standard Model cross-section at the 95% confidence level, consistent with the expected limit value of 5.4 (5.7) in the background-only (Standard Model production) hypothesis.

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