Z^(0)boson associated b-jet production in high-energy nuclear collisions  

作　　者：王洒 代巍 张本威 王恩科 Sa Wang;Wei Dai;Ben-Wei Zhang;Enke Wang(Guangdong Provincial Key Laboratory of Nuclear Science,Institute of Quantum Matter,South China Normal University,Guangzhou 510006,China;Guangdong-Hong Kong Joint Laboratory of Quantum Matter,Southern Nuclear Science Computing Center,South China Normal University,Guangzhou 510006,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)

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

出　　处：《Chinese Physics C》2023年第5期165-177,共13页中国物理C（英文版）

基　　金：Supported by the Guangdong Major Project of Basic and Applied Basic Research (2020B0301030008);the Science and Technology Program of Guangzhou(2019050001);the NSFC of China (11935007,12035007,12247127);supported by China Postdoctoral Science Foundation (2021M701279)

摘　　要：The production of vector boson tagged heavy quark jets potentially provides new tools to probe the jet quenching effect.In this paper,we present the first theoretical study on the angular correlations(ΔφbZ),transverse momentum imbalance(xbZ),and nuclear modification factor(IAA) of Z0boson tagged b-jets in heavy-ion collisions,which was performed using a Monte Carlo transport model.We find that the medium modification of theΔφbZfor Z0+b-jet has a weaker dependence on ΔφbZthan that for Z^(0)+jet,and the modification patterns are sensitive to the initial jet pTdistribution.Additionally,with the high purity of the quark jet in Z^(0)+(b-) jet production,we calculate the momentum imbalance xbZand the nuclear modification factor IAAof Z^(0)+b-jet in Pb+Pb collisions.We observe a smaller Δ<xjZ> and larger IAAof Z^(0)+b-jet in Pb+Pb collisions relative to those of Z^(0)+jet,which may be an indication of the mass effect of jet quenching and can be tested in future measurements.

关 键 词：QUARK-GLUON plasma HEAVY-ION collisions JET QUENCHING heavy QUARK JET mass effect 

分 类 号：O572.33[理学—粒子物理与原子核物理]