论文标题
高$ p _ {\ textrm {t}} $ multijet最终状态在$ \ sqrt {s} = 13 $ tev带ATLAS检测器
Measurement of hadronic event shapes in high-$p_{\textrm{T}}$ multijet final states at $\sqrt{s} = 13$ TeV with the ATLAS detector
论文作者
论文摘要
使用$ \ sqrt {s} = 13 $ tev的数据在质子 - 质子碰撞中对事件形状变量的测量进行了大量动量转移的测量。使用与139 fb $^{ - 1} $的集成发光度相对应的数据，在包含性的多重点事件中研究了六个使用Hadronic Jets计算的事件形变量。测量在射流多样性的箱和两个领先射流的横向动量的标量总和的不同范围内进行，达到了2 TEV以上的尺度。将这些测量值与蒙特卡洛事件发生器的预测进行了比较，该事件发生器包含匹配的Parton Showers模拟与领先的精度相匹配的前阶或近距离序列矩阵元素。在低射流多重性下，观察到测量和蒙特卡洛预测之间的形状差异。在高射流多重性下，可以更好地描述形状，但观察到归一化的差异。
A measurement of event-shape variables in proton-proton collisions at large momentum transfer is presented using data collected at $\sqrt{s} = 13$ TeV with the ATLAS detector at the Large Hadron Collider. Six event-shape variables calculated using hadronic jets are studied in inclusive multijet events using data corresponding to an integrated luminosity of 139 fb$^{-1}$. Measurements are performed in bins of jet multiplicity and in different ranges of the scalar sum of the transverse momenta of the two leading jets, reaching scales beyond 2 TeV. These measurements are compared with predictions from Monte Carlo event generators containing leading-order or next-to-leading order matrix elements matched to parton showers simulated to leading-logarithm accuracy. At low jet multiplicities, shape discrepancies between the measurements and the Monte Carlo predictions are observed. At high jet multiplicities, the shapes are better described but discrepancies in the normalisation are observed.
