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Advances in High Energy Physics
Volume 2016, Article ID 9632126, 10 pages
Research Article

Comparing the Tsallis Distribution with and without Thermodynamical Description in Collisions

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

Received 8 December 2015; Revised 11 March 2016; Accepted 24 March 2016

Academic Editor: Adrian Buzatu

Copyright © 2016 H. Zheng and Lilin Zhu. 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.


We compare two types of Tsallis distribution, that is, with and without thermodynamical description, using the experimental data from the STAR, PHENIX, ALICE, and CMS Collaborations on the rapidity and energy dependence of the transverse momentum spectra in collisions. Both of them can fit the particle spectra well. We show that the Tsallis distribution with thermodynamical description gives lower temperatures than the ones without it. The extra factor (transverse mass) in the Tsallis distribution with thermodynamical description plays an important role in the discrepancies between the two types of Tsallis distribution. But for the heavy particles, the choice to use or (transverse energy) in the Tsallis distribution becomes more crucial.