论文标题
在13 TEV Proton-Proton碰撞中优化ATLAS检测器的大型射流重建
Optimisation of large-radius jet reconstruction for the ATLAS detector in 13 TeV proton-proton collisions
论文作者
论文摘要
JET子结构为LHC提供了新的搜索和测量机会，并且自从在运行1期间进行了Atlas使用的大型Radius Jet定义以来的持续发展。一系列对喷气式重建的新投入，堆积缓解技术的新投入，堆积的缓解技术和喷气式杂志的算法激励大型Radius Recotigation促进对大型R-Radius Recormention的优化。在本文中，提出了此优化过程，并比较了广泛的大型拉迪乌斯喷气式定义的性能。这些喷气定义的相对性能是使用指标来评估的，例如它们的堆积稳定性，能够识别具有较大横向动量的顶级$ W $玻色子和顶级夸克的能力。引入了一种新型的喷气输入对象，称为“统一流对象”，该对象结合了基于量热计和内部检测器的信号，以便在宽的运动范围内实现最佳性能。确定了大型 - 拉迪斯喷气机的定义，这些定义可显着改善当前地图集的基线定义，并使用Atlas检测器在$ \ sqrt {s} = 13 $ TEV期间记录的$ pp $ collions研究它们的建模。
Jet substructure has provided new opportunities for searches and measurements at the LHC, and has seen continuous development since the optimization of the large-radius jet definition used by ATLAS was performed during Run 1. A range of new inputs to jet reconstruction, pile-up mitigation techniques and jet grooming algorithms motivate an optimisation of large-radius jet reconstruction for ATLAS. In this paper, this optimisation procedure is presented, and the performance of a wide range of large-radius jet definitions is compared. The relative performance of these jet definitions is assessed using metrics such as their pileup stability, ability to identify hadronically decaying $W$ bosons and top quarks with large transverse momenta. A new type of jet input object, called a 'unified flow object' is introduced which combines calorimeter- and inner-detector-based signals in order to achieve optimal performance across a wide kinematic range. Large-radius jet definitions are identified which significantly improve on the current ATLAS baseline definition, and their modelling is studied using $pp$ collisions recorded by the ATLAS detector at $\sqrt{s}=13$ TeV during 2017.
