Non-extensive statistics, fluctuations and correlations in high energy nuclear collisions

Details Non-extensive statistics, fluctuations and correlations in high energy nuclear collisions Non-extensive statistics, fluctuations and correlations in high energy nuclear collisions

1999-02-25

arxiv.org/abs/nucl-th/9902070v2

Eur.Phys.J.C12:499-506,2000

Physics

Nuclear Physics

Nuclear Theory

10 pages, 2 figures, revtex, revised version

Scientific paper

10.1007/s100529900220

Starting from the experimental evidence that high-energy nucleus-nucleus collisions cannot be described in terms of superpositions of elementary nucleon-nucleon interactions, we analyze the possibility that memory effects and long-range forces imply a nonextensive statistical regime during high energy heavy ion collisions. The relevance of these statistical effects and their compatibility with the available experimental data are discussed. In particular we show that theoretical estimates, obtained in the framework of the generalized nonextensive thermostatistics, can reproduce the shape of the pion transverse mass spectrum and explain the different physical origin of the transverse momentum correlation function of the pions emitted during the central Pb+Pb and during the p+p collisions at 158 A GeV.

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