Quenching and flow of charm and bottom quarks via semi-leptonic decay of D and B mesons in Pb+Pb collisions at the LHC  

作　　者：Shu-Qing Li Wen-Jing Xing Shanshan Cao Guang-You Qin 李树清;邢文静;曹杉杉;秦广友

机构地区：[1]School of Physics and Electronic Engineering,Jining University,Qufu 273155,China [2]Institute of Frontier and Interdisciplinary Science,Shandong University,Qingdao 266237,China [3]Institute of Particle Physics and Key Laboratory of Quark and Lepton Physics(MOE),Central China Normal University,Wuhan 430079,China

出　　处：《Chinese Physics C》2024年第8期190-197,共8页中国物理C（英文版）

基　　金：Supported in part by the National Natural Science Foundation of China(12225503,11935007,11890710,11890711,12175122,2021-867);China Postdoctoral Science Foundation(2023M742099)。

摘　　要：Heavy flavor particles provide important probes of the microscopic structure and thermodynamic properties of the quark-gluon plasma(QGP)produced in high-energy nucleus-nucleus collisions.We studied the energy loss and flow of charm and bottom quarks inside the QGP via the nuclear modification factor(R_(AA))and elliptic flow coefficient(v_(2))of their decayed leptons in heavy-ion collisions at the LHC.The dynamical evolution of the QGP was performed using the CLVisc(3+1)-dimensional viscous hydrodynamics model;the evolution of heavy quarks inside the QGP was simulated with our improved Langevin model that considers both collisional and radiative energy loss of heavy quarks;the hadronization of heavy quarks was simulated via our hybrid coalescence-fragmentation model;and the semi-leptonic decay of D and B mesons was simulated via PYTHIA.Using the same spatial diffusion coefficient for charm and bottom quarks,we obtained smaller R_(AA) and larger v_(2) of charm decayed leptons than bottom decayed leptons,indicating stronger energy loss of charm quarks than bottom quarks inside the QGP within our current model setup.

关 键 词：quark-gluon plasma heavy-ion collisions jet quenching anisotropic flow heavy quark heavy flavor muon 

分 类 号：O572.2[理学—粒子物理与原子核物理]