"Extra Figure g4p[f50]" 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].

本研究报道了表征夸克引发喷注与胶子引发喷注组分的喷注子结构（jet substructure）测量结果。本次分析采用由CMS探测器（CMS detector）采集的质心系能量√s=13 TeV的质子-质子（pp）对撞数据，对应积分亮度为35.9 fb⁻¹。研究测量了广义角距（Generalized angularities），该可观测量可表征喷注子结构并区分夸克与胶子引发的喷注，其对喷注内部的横向动量分布与角间距分布具有敏感性。本次分析使用了富含胶子引发喷注的双喷注事件样本，同时首次采用了富含夸克引发喷注的Z+喷注事件样本。该可观测量按照喷注横向动量的分箱进行测量，并以喷注半径参数为变量进行表征。所有测量均重复执行了“软滴（soft drop）”喷注清理程序，该程序可移除喷注中的软辐射与大角度辐射。为便于查阅，所有图表均采用编码命名，各字母/数字按以下顺序代表含义：未清理/已清理、AK4/AK8、带电粒子、多重数/pT_D²/推力（thrust）/宽度/LHA、[中心区双喷注/前向区双喷注/Z+喷注、横向动量（PT）]。