Comparing the Tsallis distribution with and without thermodynamical description in p+p collisions

2015/12/11 by H. Zheng, Zheng, H., Lilin Zhu +1 · 2 citations
Decision Sciences · Physics and Astronomy · #FOS: Physical sciences #Forecasting Techniques and Applications #High-Energy Particle Collisions Research #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th) #Statistical Mechanics and Entropy

paper · pdf · doi:10.48550/arxiv.1512.03555

openalex publication_date 2015/12/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We compare two types of Tsallis distribution, i.e., 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 p+p collisions. Both of them can give us the similar fitting power to the particle spectra. We show that the Tsallis distribution with thermodynamical description gives lower temperatures than the ones without it. The extra factor m_T (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 the m_T or E_T (transverse energy) in the Tsallis distribution becomes more crucial.

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