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Advances in High Energy Physics
Volume 2014, Article ID 782631, 16 pages
Research Article

Comparing Multicomponent Erlang Distribution and Lévy Distribution of Particle Transverse Momentums

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

Received 26 November 2013; Accepted 20 February 2014; Published 10 April 2014

Academic Editor: Bao-Chun Li

Copyright © 2014 Hua-Rong Wei 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.


The transverse momentum spectrums of final-state products produced in nucleus-nucleus and proton-proton collisions at different center-of-mass energies are analyzed by using a multicomponent Erlang distribution and the Lévy distribution. The results calculated by the two models are found in most cases to be in agreement with experimental data from the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC). The multicomponent Erlang distribution that resulted from a multisource thermal model seems to give a better description as compared with the Lévy distribution. The temperature parameters of interacting system corresponding to different types of final-state products are obtained. Light particles correspond to a low temperature emission, and heavy particles correspond to a high temperature emission. Extracted temperature from central collisions is higher than that from peripheral collisions.