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Title: Charged-particle rapidity density in Au+Au collisions in a quark combination model

Abstract

Rapidity/pseudorapidity densities for charged particles and their centrality, rapidity, and energy dependence in Au+Au collisions at the Relativistic Heavy Ion Collider are studied in a quark combination model. Using a Gaussian-type rapidity distribution for constituent quarks as a result of Landau hydrodynamic evolution, the data at {radical}(s{sub NN})=130,200 GeV at various centralities in full pseudorapidity range are well described, and the charged-particle multiplicities are reproduced as functions of the number of participants. The energy dependence of the shape of the dN{sub ch}/d{eta} distribution is also described at various collision energies {radical}(s{sub NN})=200,130,62.4 GeV in central collisions with same value of parameters except 19.6 GeV. The calculated rapidity distributions and yields for the charged pions and kaons in central Au+Au collisions at {radical}(s{sub NN})=200 GeV are compared with experimental data of the BRAHMS Collaboration.

Authors:
 [1]; ;  [2]
  1. Department of Physics, Qufu Normal University, Shandong 273165 (China)
  2. Department of Physics, Shandong University, Shandong 250100 (China)
Publication Date:
OSTI Identifier:
20995153
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 75; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevC.75.034904; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; BROOKHAVEN RHIC; CHARGED PARTICLES; COLLISIONS; DENSITY; DISTRIBUTION; ENERGY DEPENDENCE; GEV RANGE 10-100; GEV RANGE 100-1000; HEAVY ION REACTIONS; KAONS; MASS NUMBER; PARTICLE RAPIDITY; PIONS; QUARK MODEL; QUARKS

Citation Formats

Shao Fenglan, Yao Tao, and Xie Qubing. Charged-particle rapidity density in Au+Au collisions in a quark combination model. United States: N. p., 2007. Web. doi:10.1103/PHYSREVC.75.034904.
Shao Fenglan, Yao Tao, & Xie Qubing. Charged-particle rapidity density in Au+Au collisions in a quark combination model. United States. doi:10.1103/PHYSREVC.75.034904.
Shao Fenglan, Yao Tao, and Xie Qubing. Thu . "Charged-particle rapidity density in Au+Au collisions in a quark combination model". United States. doi:10.1103/PHYSREVC.75.034904.
@article{osti_20995153,
title = {Charged-particle rapidity density in Au+Au collisions in a quark combination model},
author = {Shao Fenglan and Yao Tao and Xie Qubing},
abstractNote = {Rapidity/pseudorapidity densities for charged particles and their centrality, rapidity, and energy dependence in Au+Au collisions at the Relativistic Heavy Ion Collider are studied in a quark combination model. Using a Gaussian-type rapidity distribution for constituent quarks as a result of Landau hydrodynamic evolution, the data at {radical}(s{sub NN})=130,200 GeV at various centralities in full pseudorapidity range are well described, and the charged-particle multiplicities are reproduced as functions of the number of participants. The energy dependence of the shape of the dN{sub ch}/d{eta} distribution is also described at various collision energies {radical}(s{sub NN})=200,130,62.4 GeV in central collisions with same value of parameters except 19.6 GeV. The calculated rapidity distributions and yields for the charged pions and kaons in central Au+Au collisions at {radical}(s{sub NN})=200 GeV are compared with experimental data of the BRAHMS Collaboration.},
doi = {10.1103/PHYSREVC.75.034904},
journal = {Physical Review. C, Nuclear Physics},
number = 3,
volume = 75,
place = {United States},
year = {Thu Mar 15 00:00:00 EDT 2007},
month = {Thu Mar 15 00:00:00 EDT 2007}
}