Differential two-particle number and momentum correlations with the AMPT, UrQMD, and EPOS models in Pb-Pb collisions at √sNN=2.76 TeV

被引：9

作者：

Basu, Sumit ^{[1
,2
]}

Gonzalez, Victor ^{[2
]}

Pan, Jinjin ^{[3
]}

Knospe, Anders ^{[4
]}

Marin, Ana ^{[5
,6
]}

Markert, Christina ^{[7
]}

Pruneau, Claude ^{[2
]}

机构：

[1] Lund Univ, Dept Phys, Div Particle Phys, Box 118, SE-22100 Lund, Sweden

[2] Wayne State Univ, Dept Phys & Astron, Detroit, MI 48201 USA

[3] Texas A&M Univ, Cyclotron Inst, College Stn, TX 77843 USA

[4] Univ Houston, Dept Phys, Houston, TX 77004 USA

[5] GSI Helmholtzzentrum Schwerionenforsch GmbH, Res Div, D-64291 Darmstadt, Germany

[6] GSI Helmholtzzentrum Schwerionenforsch GmbH, ExtreMe Matter Inst EMMI, D-64291 Darmstadt, Germany

[7] Univ Texas Austin, Dept Phys, Austin, TX 78712 USA

来源：

PHYSICAL REVIEW C | 2021年 / 104卷 / 06期

基金：

瑞典研究理事会;

关键词：

ANGULAR-CORRELATIONS; FLOW; DEPENDENCE; PARTICLES;

D O I：

10.1103/PhysRevC.104.064902

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：

We report studies of charge-independent and charge-dependent two-particle differential number correlation functions, R-2(Delta eta, Delta phi), and transverse momentum correlation functions, P-2(Delta eta, Delta phi), of charged particles produced in Pb-Pb collisions at the LHC center-of-mass energy root s(NN) = 2.76 TeV with the UrQMD, AMPT, and EPOS models. Model calculations for R-2 and P-2 correlation functions are presented for inclusive charged hadrons (h(+/-)) in selected transverse momentum ranges and with full azimuthal coverage in the pseudorapidity range vertical bar n vertical bar < 1.0. We compare these calculations for the strength, shape, and particularly the width of the correlation functions with recent measurements of these observables by the ALICE collaboration. Our analysis indicates that comparative studies of R-2 and P-2 correlation functions provide valuable insight towards the understanding of particle production in Pb-Pb collisions. We find, in particular, that these models produce quantitatively different magnitudes and shapes for these correlation functions and none reproduce the results reported by the ALICE collaboration. Accounting for quantum number conservation in models, particularly charge conservation, is mandatory to reproduce the detailed measurements of number and transverse momentum correlation functions.

引用

页数：15

共 67 条

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