论文标题
使用PP和PBPB碰撞中的JET电荷测量结果对Quark和Gluon对喷气机的贡献
Studies of Quark and Gluon Contributions to Jets using Jet Charge Measurements in pp and PbPb Collisions
论文作者
论文摘要
射流电荷定义为射流内部颗粒电荷的动量加权总和对启动Parton的电荷敏感，可用于研究QGP中Parton能量损失的色电荷依赖性。在本文中，使用Lead-Lead（PBPB）碰撞数据提出了重型离子碰撞中喷气电荷的第一个测量值，并将其与质子 - 普罗顿（PP）数据的结果进行了比较。对检测器和背景效应进行了测量，并以$ p_ \ mathrm {t} $进行差异研究，并作为PBPB碰撞中碰撞中心性的函数。我们还提出了一种模板拟合技术，用于估计基于蒙特卡洛模板的PP和PBPB碰撞中夸克和Gluon发射的射流的分数。该分析使用CMS实验收集的PP和PBPB碰撞数据，$ \ sqrt {\ mathrm {s_ {nn}}} = 5.02 $ tev。
Jet charge, defined as the momentum-weighted sum of the electric charges of particles inside a jet is sensitive to the electric charge of the initiating parton and can be used to study the color charge dependence of the parton energy loss in the QGP. In this paper, the first measurements of jet charge in heavy-ion collisions are presented using lead-lead (PbPb) collision data and compared to results from proton-proton (pp) data at the same collision energy. The measurements are unfolded for detector and background effects and are studied differentially in $p_\mathrm{T}$ and additionally as a function of collision centrality in PbPb collisions. We also present a template fitting technique for estimating the fractions of quark- and gluon-initiated jets in pp and PbPb collisions based on Monte Carlo templates. This analysis uses pp and PbPb collision data collected by the CMS experiment at $\sqrt{\mathrm{s_{NN}}}=5.02$ TeV.
