论文标题
$ h \ rightarrow b \ bar {b} $ decay频道的$ WH $和$ ZH $生产的测量
Measurements of $WH$ and $ZH$ production in the $H \rightarrow b\bar{b}$ decay channel in $pp$ collisions at 13 TeV with the ATLAS detector
论文作者
论文摘要
介绍了标准模型Higgs玻色子衰减成$ b \ bar {b} $对，并与Atlas检测器2015年至2018年收集的Proton-Proton碰撞数据相结合。这些测量值使用$ \ sqrt {s} = $ 13 TEV产生的大型强子对撞机产生的碰撞，对应于139 fb $^{ - 1} $的集成光度。建立了与$ W $或$ z $玻色子联合的希格斯玻色子的生产，观察到的（预期）意义分别为4.0（4.1）和5.3（5.1）标准偏差。将Higgs玻色子腐烂到底部夸克对的横截面，该对带有electroweak仪表玻色子，$ W $或$ z $，衰变成叶子的衰减是根据运动量基金量的仪表玻色横向动量的函数测量的。横截面测量与标准模型的预期一致，总不确定性从高规模玻色子横向动量区域的30％到低区域的85％不等。随后将限制设置为有效的拉格朗日对$ WH $和$ ZH $过程的敏感的参数，以及Higgs Boson Decay to $ b \ bar {b} $。
Measurements of the Standard Model Higgs boson decaying into a $b\bar{b}$ pair and produced in association with a $W$ or $Z$ boson decaying into leptons, using proton-proton collision data collected between 2015 and 2018 by the ATLAS detector, are presented. The measurements use collisions produced by the Large Hadron Collider at a centre-of-mass energy of $\sqrt{s} = $13 TeV, corresponding to an integrated luminosity of 139 fb$^{-1}$. The production of a Higgs boson in association with a $W$ or $Z$ boson is established with observed (expected) significances of 4.0 (4.1) and 5.3 (5.1) standard deviations, respectively. Cross-sections of associated production of a Higgs boson decaying into bottom quark pairs with an electroweak gauge boson, $W$ or $Z$, decaying into leptons are measured as a function of the gauge boson transverse momentum in kinematic fiducial volumes. The cross-section measurements are all consistent with the Standard Model expectations, and the total uncertainties vary from 30% in the high gauge boson transverse momentum regions to 85% in the low regions. Limits are subsequently set on the parameters of an effective Lagrangian sensitive to modifications of the $WH$ and $ZH$ processes as well as the Higgs boson decay into $b\bar{b}$.
