Hadron productions and jet substructures associated with Z^(0)/γ in Pb+Pb collisions at the LHC  

作　　者：Shan-Liang Zhang Hongxi Xing Ben-Wei Zhang 

机构地区：[1]Key Laboratory of Atomic and Subatomic Structure and Quantum Control(MOE),Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter,Institute of Quantum Matter,South China Normal University,Guangzhou 510006,China [2]Guangdong-Hong Kong Joint Laboratory of Quantum Matter,Guangdong Provincial Key Laboratory of Nuclear Science,Southern Nuclear Science Computing Center,South China Normal University,Guangzhou 510006,China [3]Guangdong-Hong Kong Joint Laboratory of Quantum Matter,Southern Nuclear Science Computing Center,South China Normal University,Guangzhou 510006,China [4]Institute of Particle Physics and Key Laboratory of Quarks and Lepton Physics(MOE),Central China Normal University,Wuhan 430079,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2023年第12期77-89,共13页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the Guangdong Major Project of Basic and Applied Basic Research(Grant No.2020B0301030008);the National Natural Science Foundation of China(Grant Nos.12147131,11935007,12035007,and 12022512);supported by the MOE Key Laboratory of Quark and Lepton Physics(CCNU)(Grant No.QLPL2021P01)。

摘　　要：We carry out a detailed study of medium modifications on Z^(0)/γ+hadron correlations as well as jet substructures in association with Z^(0)/γ in Pb+Pb collisions with √S_(NN)=5.02TeV at the LHC.We utilize the linear Boltzmann transport(LBT)model to simulate the jet-medium interactions and medium response,and an extended cluster hadronization model to investigate the nonperturbative transition of quarks and gluons into final hadrons in heavy-ion collisions.Including hadronization effect,we can well describe Z^(0)/γ+hadrons correlations and Z^(0)/γ-tagged jet substructures in both p+p and Pb+Pb collisions simultaneously.Medium modification on jet profile and jet fragmentation functions indicate that particles carrying a large fraction of the jet momentum are generally closely aligned with the jet axis,whereas low-momentum particles are observed to have a much broader angular distribution relative to jet axis in Pb+Pb collisions due to jet-medium interactions.In particular,we find that Z^(0)/γ-tagged hadron correlations are sensitive to the soft particles from the dense medium and medium response,while jet-substructures show weak dependence on those soft hadrons with only a fraction of them falling inside the jet area.

关 键 词：relativistic heavy-ion collisions jet quenching HADRONIZATION jet substructures 

分 类 号：O572.2[理学—粒子物理与原子核物理]