A description of the transverse momentum distributions of charged particles produced in heavy ion collisions at RHIC and LHC energies

TL;DR

This paper employs nonextensive statistics combined with relativistic hydrodynamics to effectively model the transverse momentum distributions of charged particles in heavy ion collisions at RHIC and LHC energies, capturing experimental data across a broad p_T range.

Contribution

It introduces a novel approach combining nonextensive statistics with hydrodynamics to better describe particle distributions in heavy ion collisions, extending the p_T range compared to previous models.

Findings

Good agreement with experimental data for pions, kaons, and protons.

Extended the describable p_T region up to 2.0 GeV/c for protons.

Demonstrated the importance of memory effects and long-range interactions.

Abstract

By assuming the existing of memory effects and long-range interactions in the hot and dense matter produced in high energy heavy ion collisions, the nonextensive statistics together with the relativistic hydrodynamics including phase transition is used to discuss the transverse momentum distributions of charged particles produced in heavy ion collisions. It is shown that the combined contributions from nonextensive statistics and hydrodynamics can give a good description to the experimental data in Au+Au collisions at sqrt(s_NN )= 200 GeV and in Pb+Pb collisions at sqrt(s_NN) )= 2.76 TeV for pi^(+ -) , K^(+ -) in the whole measured transverse momentum region, and for p(p-bar) in the region of p_T<= 2.0 GeV/c. This is different from our previous work, where, by using the conventional statistics plus hydrodynamics, the describable region is only limited in p_T<= 1.1 GeV/c.