论文标题
在PBPB中使用喷气电荷在5.02 TEV时使用喷气荷荷兰的测量夸克和Gluon样射流分数
Measurement of quark- and gluon-like jet fractions using jet charge in PbPb and pp collisions at 5.02 TeV
论文作者
论文摘要
射流中颗粒电荷的动量加权总和（称为射流电荷）对启动Parton淋浴的粒子的电荷敏感。本文以$ \ sqrt {s_ \ mathrm {nn}} = $ 5.02 TEV Lead-Lead（PBPB）和Proton-Proton（PP）碰撞记录与LHC处的CMS检测器记录的proton-Proton（PP）碰撞。这些数据对应于404 $ $ $ $ b $^{ - 1} $和27.4 pb $^{ - 1} $的集成发光度分别用于PBPB和PP碰撞。利用喷气电荷对夸克和胶子电荷基本差异的敏感性，将使用模拟事件的射流电荷分布用作模板，以从数据中提取夸克和gluon样喷射分数。通过比较PP和PBPB数据作为碰撞PB核的重叠（中心性）的函数来检查这些喷射分数的修饰。该测量测试了由于与夸克 - 粘液等离子体相互作用而引起的射流能量损失的颜色电荷依赖性。在夸克和Gluon样射流的提取部分中，不同的中心性类别之间未观察到不同的中心性类别和PP结果。
The momentum-weighted sum of the electric charges of particles inside a jet, known as jet charge, is sensitive to the electric charge of the particle initiating the parton shower. This paper presents jet charge distributions in $\sqrt{s_\mathrm{NN}} =$ 5.02 TeV lead-lead (PbPb) and proton-proton (pp) collisions recorded with the CMS detector at the LHC. These data correspond to integrated luminosities of 404 $μ$b$^{-1}$ and 27.4 pb$^{-1}$ for PbPb and pp collisions, respectively. Leveraging the sensitivity of the jet charge to fundamental differences in the electric charges of quarks and gluons, the jet charge distributions from simulated events are used as templates to extract the quark- and gluon-like jet fractions from data. The modification of these jet fractions is examined by comparing pp and PbPb data as a function of the overlap of the colliding Pb nuclei (centrality). This measurement tests the color charge dependence of jet energy loss due to interactions with the quark-gluon plasma. No significant modification between different centrality classes and with respect to pp results is observed in the extracted fractions of quark- and gluon-like jet fractions.
