Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector
Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector
复制标题
DOI：
10.1016/j.physletb.2018.07.035
复制
发表时间：
2018-09-10
影响因子：
4.4
通讯作者：
Zwalinski, L.
中科院分区：
文献类型：
--
作者：
Aaboud, M.;Aad, G.;Zwalinski, L.
本文介绍了利用大型强子对撞机ATLAS探测器在质心能量为13 TeV的质子-质子碰撞数据分析的基础上，观测到的顶夸克对（t（t）over barH）中Higgs玻色子的产生。使用对应于高达79.8 fb（-1）的积分光度的数据，并考虑希格斯玻色子在bar、WW*、tau（+）tau（-）、gamma gamma和ZZ* 上衰变为B（B），观察到的显著性为5.8标准差，而预期为4.9标准差。结合使用对应于7 TeV处4.5 fb（-1）和8 TeV处20.3 fb（-1）的积分光度的数据集的t（t）over barH搜索，观察到的（预期的）显著性为6.3（5.1）标准差。假设标准模型分支分数，在13 TeV下barH产生截面上的总t（t）被测量为670 +/- 90（stat.）（-100）（+110）（系统）FB，与标准模型预测一致。(c)2018作者（S）由爱思唯尔公司出版
The observation of Higgs boson production in association with a top quark pair (t (t) over barH), based on the analysis of proton-proton collision data at a centre-of-mass energy of 13 TeV recorded with the ATLAS detector at the Large Hadron Collider, is presented. Using data corresponding to integrated luminosities of up to 79.8 fb(-1), and considering Higgs boson decays into b (b) over bar, WW*, tau(+)tau(-), gamma gamma, and ZZ*, the observed significance is 5.8 standard deviations, compared to an expectation of 4.9 standard deviations. Combined with the t (t) over barH searches using a dataset corresponding to integrated luminosities of 4.5 fb(-1) at 7 TeV and 20.3 fb(-1) at 8 TeV, the observed (expected) significance is 6.3 (5.1) standard deviations. Assuming Standard Model branching fractions, the total t (t) over barH production cross section at 13 TeV is measured to be 670 +/- 90(stat.)(-100)(+110)(syst.) fb, in agreement with the Standard Model prediction. (c) 2018 The Author(s). Published by Elsevier B.V.