Electron and photon energy calibration with the ATLAS detector using LHC Run 2 data
Electron and photon energy calibration with the ATLAS detector using LHC Run 2 data
复制标题
使用 LHC Run 2 数据通过 ATLAS 探测器进行电子和光子能量校准
DOI：
10.1088/1748-0221/19/02/p02009
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发表时间：
2024
影响因子：
1.3
通讯作者：
Aad G
中科院分区：
文献类型：
--
作者：
Aad G
本文介绍了使用 ATLAS 探测器使用约 25 fb of LHC 质子-质子碰撞数据实现的电子和光子能量校准，该数据在质心能量为 10 和 8 TeV 处获取。使用多元算法优化电子和光子能量的重建。量热计层的响应在数据和模拟中均衡，并且利用电磁簇射的纵向剖面来估计量热计前面的无源材料并重新优化探测器模拟。在所有校正之后，共振用于设置绝对能量尺度。对于来自衰变的电子，在大多数探测器可接受的情况下，所实现的校准通常精确到 0.05%，在具有大量被动材料的区域中上升到 0.2%。对于横向能量为 10 GeV 的电子，剩余的误差小于 0.2–1%；对于光子，剩余的误差平均为 0.3%。对于横向能量高达 60 GeV 的电子和光子，探测器分辨率的相对误差小于 10%，对于横向能量高于 500 GeV 的相对误差则上升至 40%。
This paper presents the electron and photon energy calibration achieved with the ATLAS detector using about 25 fbof LHC proton–proton collision data taken at centre-of-mass energies ofand 8 TeV. The reconstruction of electron and photon energies is optimised using multivariate algorithms. The response of the calorimeter layers is equalised in data and simulation, and the longitudinal profile of the electromagnetic showers is exploited to estimate the passive material in front of the calorimeter and reoptimise the detector simulation. After all corrections, theresonance is used to set the absolute energy scale. For electrons fromdecays, the achieved calibration is typically accurate to 0.05 % in most of the detector acceptance, rising to 0.2 % in regions with large amounts of passive material. The remaining inaccuracy is less than 0.2–1 % for electrons with a transverse energy of 10 GeV, and is on average 0.3 % for photons. The detector resolution is determined with a relative inaccuracy of less than 10 % for electrons and photons up to 60 GeV transverse energy, rising to 40 % for transverse energies above 500 GeV.