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Advances in High Energy Physics
Volume 2015 (2015), Article ID 614090, 9 pages
http://dx.doi.org/10.1155/2015/614090
Research Article

On Productions of Net-Baryons in Central Au-Au Collisions at RHIC Energies

Institute of Theoretical Physics, Shanxi University, Taiyuan, Shanxi 030006, China

Received 22 May 2015; Revised 17 June 2015; Accepted 18 June 2015

Academic Editor: Sally Seidel

Copyright © 2015 Ya-Hui Chen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The publication of this article was funded by SCOAP3.

Abstract

The transverse momentum and rapidity distributions of net-baryons (baryons minus antibaryons) produced in central gold-gold (Au-Au) collisions at 62.4 and 200 GeV are analyzed in the framework of a multisource thermal model. Each source in the model is described by the Tsallis statistics to extract the effective temperature and entropy index from the transverse momentum distribution. The two parameters are used as input to describe the rapidity distribution and to extract the rapidity shift and contribution ratio. Then, the four types of parameters are used to structure some scatter plots of the considered particles in some three-dimensional (3D) spaces at the stage of kinetic freeze-out, which are expected to show different characteristics for different particles and processes. The related methodology can be used in the analyses of particle production and event holography, which are useful for us to better understand the interacting mechanisms.