Ultraviolet energy dependence of particle production sources in relativistic heavy-ion collisions

TL;DR

This paper investigates how different sources of particle production in relativistic heavy-ion collisions depend on collision energy, revealing distinct logarithmic behaviors and the dominance of gluon-gluon sources at higher energies.

Contribution

It introduces a detailed analysis of energy dependence for various particle production sources, highlighting the stronger ln^3 dependence of gluon-gluon sources at LHC energies.

Findings

Charged-hadron production follows a ln(s_NN/s_0) law.

Gluon-gluon source exhibits a ln^3(s_NN/s_0) dependence.

Gluon-gluon source becomes dominant at LHC energies.

Abstract

The energy dependence of particle production sources in relativistic heavy-ion collisions is investigated from RHIC to LHC energies. Whereas charged-hadron production in the fragmentation sources follows a ln(s_NN/s_0) law, particle production in the mid-rapidity gluon-gluon source exhibits a much stronger dependence proportional to ln^3(s_NN/s_0), and becomes dominant between RHIC and LHC energies. The production of particles with pseudorapidities beyond the beam rapidity is also discussed.