p_(T) dispersion of inclusive jets in high-energy nuclear collisions  

作　　者：Shi-Yong Chen Jun Yan Wei Dai Ben-Wei Zhang En-Ke Wang 陈时勇;鄢君;代巍;张本威;王恩科(Huanggang Normal University,Huanggang 438000,China;Key Laboratory of Quark&Lepton Physics(MOE)and Institute of Particle Physics,Central China Normal University,Wuhan 430079,China;School of Mathematics and Physics,China University of Geosciences,Wuhan 430074,China;Guangdong Provincial Key Laboratory of Nuclear Science,Institute of Quantum Matter,South China Normal University,Guangzhou 510006,China)

机构地区：[1]Huanggang Normal University,Huanggang 438000,China [2]Key Laboratory of Quark&Lepton Physics(MOE)and Institute of Particle Physics,Central China Normal University,Wuhan 430079,China [3]School of Mathematics and Physics,China University of Geosciences,Wuhan 430074,China [4]Guangdong Provincial Key Laboratory of Nuclear Science,Institute of Quantum Matter,South China Normal University,Guangzhou 510006,China

出　　处：《Chinese Physics C》2022年第10期139-146,共8页中国物理C（英文版）

基　　金：Supported in part by Guangdong Major Project of Basic and Applied Basic Research(2020B0301030008);the National Natural Science Foundation of China(NSFC)(11935007,12035007);the MOE Key Laboratory of Quark and Lepton Physics(CCNU)(QLPL2020P01)。

摘　　要：In this study,we investigate the impact of jet quenching on the p_(T) dispersion(p_(T)D)of inclusive jets(R=0.2)in central Pb+Pb(0%-10%)collisions at √s=2.76 TeV.The partonic spectrum in the initial hard scattering of elementary collisions is obtained by an event generator POWHEG+PYTHIA,which matches the next-to-leading order(NLO)matrix elements with parton showering,and the energy loss of a fast parton traversing through hot/dense QCD medium is calculated using Monte Carlo simulation within the Higher-Twist formalism of jet quenching in heavy-ion collisions.We present model calculations of the normalized p_(T)D distributions of inclusive jets in p+p and central Pb+Pb collisions at √s=2.76 TeV,which offer good descriptions of ALICE measurements.It is shown that the p_(T)D distributions of inclusive jets in central Pb+Pb collisions shift significantly to a higher p_(T)D region relative to those in p+p collisions.Thus,the nuclear modification ratio of the p_(T)D distributions of inclusive jets is smaller than unity in the small p_(T)D region and larger than one in the large p_(T)D region.This behavior is caused by a more uneven p_(T) distribution for jet constituents as well as the fraction alteration of quark/gluon initiated jets in heavy-ion collisions.The difference in p_(T)D distribution between groomed and ungroomed jets in Pb+Pb collisions is also discussed.

关 键 词：jet quenching jet substructure heavy-ion collisions 

分 类 号：O571.6[理学—粒子物理与原子核物理]