论文标题
与$ \ sqrt {s} = 13 $ tev一起使用ATLAS检测器
Measurements of the production cross-section for a $Z$ boson in association with $b$-jets in proton-proton collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector
论文作者
论文摘要
本文介绍了$ z $玻色子的生产横截面与$ b $ jets联合的质子 - 普罗顿碰撞，$ \ sqrt {s} = 13 $ tev the Atlas实验的大型HADRON碰撞器，使用与35.6 fb $^$^{-1} $的集成光度相关的大型HADRON碰撞器的Atlas实验。测量包含和差异的横截面，用于将$ z $玻色子腐烂到电子或muons中的事件，并与至少一个或至少两个或至少两个$ b $ -jets结合，带有横向动量$ p_ \ textrm {t}> $ 20 gev和20 gev and Rapidity $ | y | y | y | y | y | y | y | <2.5 $。将基于前阶（LO）或近代领先阶（NLO）矩阵元件的几个蒙特卡洛发电机的预测与Parton-shower模拟连接并测试不同风味方案以选择初始状态partons的选择。 NLO准确性的5流量数字方案预测与数据比4-Flavour Number Scheme One更好一致。 4-Flavour编号方案预测至少有一个B-JET的事件中低估了数据。
This paper presents a measurement of the production cross-section of a $Z$ boson in association with $b$-jets, in proton-proton collisions at $\sqrt{s} = 13$ TeV with the ATLAS experiment at the Large Hadron Collider using data corresponding to an integrated luminosity of 35.6 fb$^{-1}$. Inclusive and differential cross-sections are measured for events containing a $Z$ boson decaying into electrons or muons and produced in association with at least one or at least two $b$-jets with transverse momentum $p_\textrm{T}>$ 20 GeV and rapidity $|y| < 2.5$. Predictions from several Monte Carlo generators based on leading-order (LO) or next-to-leading-order (NLO) matrix elements interfaced with a parton-shower simulation and testing different flavour schemes for the choice of initial-state partons are compared with measured cross-sections. The 5-flavour number scheme predictions at NLO accuracy agree better with data than 4-flavour number scheme ones. The 4-flavour number scheme predictions underestimate data in events with at least one b-jet.
