"Table 1" of "Properties of $g\rightarrow b\bar{b}$ at small opening angles in $pp$ collisions with the ATLAS detector at $\sqrt{s}=13$ TeV"

CERN-LHC. The fragmentation of high energy gluons at small opening angles is largely unconstrained by present measurements. Gluon splitting to b-quark pairs is a unique probe into the properties of gluon fragmentation because identified b-tagged jets provide a proxy for the quark daughters of the initial gluon. In this study, key differential distributions related to the g->bb process are measured using 33/fb of sqrt(s)=13 TeV pp collision data recorded by the ATLAS experiment at the LHC in 2016. Jets constructed from charged-particle tracks, clustered with the jet anti-kt algorithm with radius parameter R = 0.2, are used to probe angular scales below the R = 0.4 jet radius. The observables are unfolded to particle level in order to facilitate direct comparisons with predictions from present and future simulations.欧洲核子研究中心大型强子对撞机（CERN-LHC）。小张角下高能胶子的碎裂过程基本未被现有测量充分约束。胶子劈裂为b夸克对是研究胶子碎裂性质的独特探针，因为经识别的b标记喷流可作为初始胶子的夸克子代的替代观测对象。本研究利用2016年LHC上ATLAS实验采集的、质心系能量√s=13 TeV的33 fb⁻¹（反飞靶恩）质子-质子碰撞数据，测量了与g→bb过程相关的关键微分分布。实验采用由带电粒子径迹构建、使用半径参数R=0.2的反k_t（anti-k_t）喷注聚类算法得到的喷注，以探测小于R=0.4喷注半径的角尺度范围。为便于与当前及未来的理论模拟预言开展直接比对，本研究将所有可观测量解卷积至粒子级真实层面。