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Advances in High Energy Physics
Volume 2017, Article ID 6708581, 10 pages
https://doi.org/10.1155/2017/6708581
Research Article

A New Two-Component Model for Hadron Production in Heavy-Ion Collisions

1College of Physical Science and Technology, Sichuan University, Chengdu 610064, China
2Laboratori Nazionali del Sud, INFN, Via Santa Sofia 62, 95123 Catania, Italy

Correspondence should be addressed to Hua Zheng; ti.nfni.snl@gnehz

Received 16 February 2017; Accepted 19 April 2017; Published 23 May 2017

Academic Editor: Ming Liu

Copyright © 2017 Xuejiao Yin 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

Using the experimental data from the ALICE program on the centrality dependence of the transverse momentum () spectra in Pb+Pb collisions at  TeV, we show that the double-Tsallis distribution and the generalized Fokker-Planck (FP) solution cannot describe the spectra of pions, kaons, and protons from central to peripheral collisions in the entire region, simultaneously. Hence, a new two-component distribution, which is a hydrodynamic extension of the generalized FP solution accounting for the collective motion effect in heavy-ion collisions, is proposed in order to reproduce all the identified particle spectra. Our results suggest that the particle production dynamics may be different for different particles, especially at very low region.