论文标题
Atlas Muon触发在Run 2中的性能
Performance of the ATLAS muon triggers in Run 2
论文作者
论文摘要
通过Proton-Proton（$ PP $）和重型离子（HI）碰撞数据在2015 - 2018年在大型强子对撞机上收集的Atlas Muon触发系统的性能进行评估。它主要是使用包含$ z $玻色子衰减中的一对imo的事件来评估的，以覆盖25 GEV和100 GEV之间的中间动量范围。总体而言，单人触发器的效率约为68％，在端盖区域为85％。 $ p _ {\ text {t}} $范围用于确定效率的范围，通过使用$ j/ψ$梅森，$ w $ bosons和top Quarks的衰减中的MUON来扩展。测量了HI碰撞数据中的性能，并与$ PP $ Collisions中获得的结果显示出良好的一致性。 MUON触发器表现出均匀且稳定的性能，与详细模拟的预测很好地吻合。具有运动学选择的专用多人触发器为美容，Quarkonia和低质量物理研究提供了骨干。这些触发器的设计，演变和性能将详细讨论。
The performance of the ATLAS muon trigger system is evaluated with proton-proton ($pp$) and heavy-ion (HI) collision data collected in Run 2 during 2015-2018 at the Large Hadron Collider. It is primarily evaluated using events containing a pair of muons from the decay of $Z$ bosons to cover the intermediate momentum range between 25 GeV and 100 GeV. Overall, the efficiency of the single-muon triggers is about 68 % in the barrel region and 85% in the endcap region. The $p_{\text{T}}$ range for efficiency determination is extended by using muons from decays of $J/ψ$ mesons, $W$ bosons, and top quarks. The performance in HI collision data is measured and shows good agreement with the results obtained in $pp$ collisions. The muon trigger shows uniform and stable performance in good agreement with the prediction of a detailed simulation. Dedicated multi-muon triggers with kinematic selections provide the backbone to beauty, quarkonia, and low-mass physics studies. The design, evolution and performance of these triggers are discussed in detail.
