Low-momentum pion enhancement from schematic hadronization of a gluon-saturated initial state
Abstract
We study the particle production in the early stage of the ultrarelativistic heavy-ion collisions. To this end the Boltzmann kinetic equations for gluons and pions with elastic rescattering are considered together with a simple model for the parton-hadron conversion process (hadronisation). It is shown that the overpopulation of the gluon phase space in the initial state leads to an intermediate stage of Bose enhancement in the low-momentum gluon sector which due to the gluon-pion conversion process is then reflected in the final distribution function of pions. This pattern is very similar to the experimental finding of a low-momentum pion enhancement in the ALICE experiment at CERN LHC. Relations to the thermal statistical model of hadron production and the phenomenon of thermal and chemical freeze-out are discussed in this context.
Keywords
Cite
@article{arxiv.1903.03025,
title = {Low-momentum pion enhancement from schematic hadronization of a gluon-saturated initial state},
author = {Elizaveta Nazarova and Łukasz Juchnowski and David Blaschke and Tobias Fischer},
journal= {arXiv preprint arXiv:1903.03025},
year = {2019}
}