"Extra Figure g8p[f481]" of "Study of quark and gluon jet substructure in Z+jet and dijet events from pp collisions"

Measurements of jet substructure describing the composition of quark- and gluon-initiated jets are presented. Proton-proton (pp) collision data at sqrt(s)=13 TeV collected with the CMS detector are used, corresponding to an integrated luminosity of 35.9/fb. Generalized angularities are measured that characterize the jet substructure and distinguish quark- and gluon-initiated jets. These observables are sensitive to the distributions of transverse momenta and angular distances within a jet. The analysis is performed using a data sample of dijet events enriched in gluon-initiated jets, and, for the first time, a Z+jet event sample enriched in quark-initiated jets. The observables are measured in bins of jet transverse momentum, and as a function of the jet radius parameter. Each measurement is repeated applying a "soft drop" grooming procedure that removes soft and large angle radiation from the jet.For easier navigation, figures are named with a code with each letter/number representing in the following order: ungroomed/groomed, AK4/AK8, charged, multiplicity/pTD2/thrust/width/LHA, [central dijet/forward dijet/Z+jet, PT].

本文呈现了针对夸克引发喷注与胶子引发喷注的组成特性开展的喷注子结构测量结果。实验所用数据为CMS探测器（CMS Detector）采集的质心系能量√s=13 TeV的质子-质子（pp）碰撞样本，对应积分亮度达35.9 fb⁻¹。研究团队测量了广义角距（Generalized Angularities），此类可观测量可用于表征喷注子结构，并实现夸克引发喷注与胶子引发喷注的区分。此类可观测量对喷注内部的横向动量分布与角间距分布具有敏感性。本次分析采用两类事件样本：一类为富含胶子引发喷注的双喷注事件样本，另一类则为本研究首次采用的富含夸克引发喷注的Z+喷注事件样本。上述可观测量以喷注横向动量为分箱进行测量，同时以喷注半径参数为自变量开展表征。所有测量均分别开展了未修整与已修整两种工况下的测试，其中已修整工况采用“软滴落（Soft Drop）”喷注修整程序，该程序可移除喷注内的软辐射与大角度辐射。为便于图表检索，所有图表均采用编码命名，编码内的每个字母/数字按以下顺序对应不同信息维度：未修整/已修整、AK4/AK8、带电粒子、多重数/pTD²/喷注重心/喷注宽度/LHA、[中心双喷注/前向双喷注/Z+喷注、横向动量（PT）]。