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arXiv 2007.02645hep-ex
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用ATLAS探测器在$\sqrt{s}=13$ TeV质子-质子碰撞中测量的喷流能量标度和分辨率

Jet energy scale and resolution measured in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector

ATLAS Collaboration

备注：
73 pages in total, author list starting page 57, 31 figures, 2 tables, submitted to Eur. Phys. J. C. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/JETM-2018-05
发表信息：
Eur. Phys. J. C 81 (2021) 689
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摘要：

利用ATLAS探测器在LHC上收集的质量中心能量为$\sqrt{s}=13$ TeV的质子-质子碰撞数据，给出了36-81 fb $^{-1}$的喷流能量尺度和分辨率测量结果及其相关的不确定性。射流重建使用两种不同的输入类型：拓扑簇形成的能量沉积在量热计细胞，以及带电粒子轨道与这些拓扑簇的算法组合，被称为ATLAS粒子流重建方法。具有半径参数$R=0.4$的反$k_t$喷流算法是用于两种喷流类型的主要喷流定义。最初使用一系列基于模拟的校正来校准射流。接下来，采用几种$\textit{in situ}$技术来校正数据和模拟之间的差异，并测量射流的分辨率。中心喷流能量标度（$|η|<1.2$）的系统不确定性从大范围高$p_{\text{T}}$喷流（$250<p_{\text{T}}<2000$ GeV）的1%变化到非常低$p_{\text{T}}$（20 GeV）的5%和非常高$p_{\text{T}}$（$>2.5$ TeV）的3.5%。测量了相对喷流能量分辨率，其范围从20 GeV的（$24 \pm 1.5$）%到300 GeV的（$6 \pm 0.5$）%。

英文摘要：

Jet energy scale and resolution measurements with their associated uncertainties are reported for jets using 36-81 fb$^{-1}$ of proton-proton collision data with a centre-of-mass energy of $\sqrt{s}=13$ TeV collected by the ATLAS detector at the LHC. Jets are reconstructed using two different input types: topo-clusters formed from energy deposits in calorimeter cells, as well as an algorithmic combination of charged-particle tracks with those topo-clusters, referred to as the ATLAS particle-flow reconstruction method. The anti-$k_t$ jet algorithm with radius parameter $R=0.4$ is the primary jet definition used for both jet types. Jets are initially calibrated using a sequence of simulation-based corrections. Next, several $\textit{in situ}$ techniques are employed to correct for differences between data and simulation and to measure the resolution of jets. The systematic uncertainties in the jet energy scale for central jets ($|η|<1.2$) vary from 1% for a wide range of high-$p_{\text{T}}$ jets ($250<p_{\text{T}}<2000$ GeV), to 5% at very low $p_{\text{T}}$ (20 GeV) and 3.5% at very high $p_{\text{T}}$ ($>2.5$ TeV). The relative jet energy resolution is measured and ranges from ($24 \pm 1.5$)% at 20 GeV to ($6 \pm 0.5$)% at 300 GeV.

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