Longitudinal momentum fraction of heavy-flavor mesons in jets in high-energy nuclear collisions

被引：8

作者：

Li, Yao ^{[1
,2
]}

Wang, Sa ^{[3
,4
]}

Zhang, Ben-Wei ^{[1
,2
,4
]}

机构：

[1] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Peoples R China

[2] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China

[3] South China Normal Univ, Inst Quantum Matter, Key Lab Atom & Subat Struct & Quantum Control MOE, Guangzhou 510006, Peoples R China

[4] South China Normal Univ, Inst Quantum Matter, Guangdong Prov Key Lab Nucl Sci, Guangzhou 510006, Peoples R China

来源：

PHYSICAL REVIEW C | 2023年 / 108卷 / 02期

基金：

中国博士后科学基金;

关键词：

PBPB COLLISIONS; INCLUSIVE JET; CHARM QUARKS; FRAGMENTATION; SUPPRESSION; EXTRACTION; SCATTERING; DIFFUSION; TRANSPORT; PROMPT;

D O I：

10.1103/PhysRevC.108.024905

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Heavy-flavor jets are powerful tools to gain insight into the in-medium partonic energy-loss mechanisms and the quark-gluon plasma's (QGP) transport properties in high-energy nuclear collisions. In this work we present the first theoretical study of the longitudinal momentum fraction z|| carried by heavy-flavor mesons in jets in Pb+Pb collisions at & RADIC;sNN = 5.02 TeV. The p+p baseline is provided by POWHEG+pYTHIA8, which matches the next-to-leading-order hard processes with the parton shower. We employ a Monte Carlo transport model, which considers the collisional and radiative partonic energy loss, to simulate the evolution of heavy-flavor jets in the expanding QGP medium. We observe steeper z|| distributions of B0 jets compared to those of D0 jets at the same kinematics region in p+p collisions, which may be a hint of the harder jet fragmentation function of b jets compared to c jets in vacuum. In A+A collisions, it is shown that the jet quenching effect would generally decrease the values of z||. We have made a systematical study on how several factors, including jet pT, jet radius R, and collision centrality, would influence the medium modification of z|| distributions of a D0 jet. In addition, we predict visibly stronger nuclear modifications of B0-jet z|| distributions compared to a D0 jet within the same pT windows as a result of the much steeper initial z|| distribution of the B0 jet in vacuum.

引用

页数：10

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