Different non-extensive models for heavy-ion collisions

Ke-Ming Shen, Tamas S. Biro and En-Ke Wang

Physica A: Statistical Mechanics and its Applications, 2018, vol. 492, issue C, 2353-2360

Abstract: The transverse momentum (pT) spectra from heavy-ion collisions at intermediate momenta are described by non-extensive statistical models. Assuming a fixed relative variance of the temperature fluctuating event by event or alternatively a fixed mean multiplicity in a negative binomial distribution (NBD), two different linear relations emerge between the temperature, T, and the Tsallis parameter q−1. Our results qualitatively agree with that of G. Wilk. Furthermore we revisit the “Soft+Hard” model, proposed recently by G.G. Barnaföldi et.al., by a T-independent average pT2 assumption. Relevance of these two parameters is demonstrated. Finally we compare results with those predicted by another deformed distribution, using Kaniadakis’ κ parametrization.

Keywords: Non-extensive parameter; The transverse momentum spectra; Negative binomial distribution (search for similar items in EconPapers)
Date: 2018
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:492:y:2018:i:c:p:2353-2360

DOI: 10.1016/j.physa.2017.11.160

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