Measurement of inclusive and differential cross sections for single top quark production in association with a W boson in proton-proton collisions at $$ \sqrt{s} $$ = 13 TeV
Measurement of inclusive and differential cross sections for single top quark production in association with a W boson in proton-proton collisions at $$ \sqrt{s} $$ = 13 TeV
复制标题
测量 $$ sqrt{s} $$ = 13 TeV 质子-质子碰撞中与 W 玻色子相关的单顶夸克产生的包容性和微分横截面
DOI：
10.1007/jhep07(2023)046
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发表时间：
2023
影响因子：
5.4
通讯作者：
Jeitler, M.
中科院分区：
文献类型：
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作者：
Tumasyan, A.;Adam, W.;Andrejkovic, J. W.;Bergauer, T.;Chatterjee, S.;Damanakis, K.;Dragicevic, M.;Escalante Del Valle, A.;Hussain, P. S.;Jeitler, M.
测量的包容性和归一化微分截面的生产与W玻色子在质子-质子碰撞在质心能量为13 TeV的单个顶夸克。使用的数据是在2016-2018年期间在LHC上用CMS探测器记录的，对应于138 fb− 1的积分光度。事件包含一个电子和一个μ子在最后状态进行了分析。对于包容性测量，利用事件的运动学特性的多元判别式用于将信号与占主导地位的背景分离。pb的横截面得到，与标准模型的预测一致。对于差分测量，根据探测器的接受度定义一个基准区域，并要求恰好有一个来自底夸克碎裂的喷流。所得分布展开到粒子水平，并与微扰量子色动力学中次领先阶的预测一致。
Measurements of the inclusive and normalised differential cross sections are presented for the production of single top quarks in association with a W boson in proton-proton collisions at a centre-of-mass energy of 13 TeV. The data used were recorded with the CMS detector at the LHC during 2016–2018, and correspond to an integrated luminosity of 138 fb− 1. Events containing one electron and one muon in the final state are analysed. For the inclusive measurement, a multivariate discriminant, exploiting the kinematic properties of the events is used to separate the signal from the dominantbackground. A cross section ofpb is obtained, consistent with the predictions of the standard model. For the differential measurements, a fiducial region is defined according to the detector acceptance, and the requirement of exactly one jet coming from the fragmentation of a bottom quark. The resulting distributions are unfolded to particle level and agree with the predictions at next-to-leading order in perturbative quantum chromodynamics.