Transverse momentum spectra of hadrons produced in central heavy-ion collisions

TL;DR

This paper investigates how the transverse momentum spectra of hadrons in central heavy-ion collisions are affected by in-medium effects and local equilibrium assumptions, showing energy-dependent saturation behavior consistent with experimental observations.

Contribution

It introduces a model considering in-medium effects on quark and gluon transverse-mass distributions, linking these effects to observed hadron spectra in heavy-ion collisions.

Findings

Average transverse momentum squared grows then saturates with energy.

Model reproduces the energy dependence of hadron transverse mass spectra.

Comparison with other models highlights unique features of the proposed approach.

Abstract

In-medium effects of transverse-mass distributions of quarks and gluons are considered assuming a possible local equilibrium for colorless quark objects like mesons and baryons created in central A+A collisions. It is shown that the average square of the transverse momentum for these partons grows and then saturates when the initial energy increases. Within the quark-gluon string model it leads to the energy dependence of hadron transverse mass spectra which is similar to that observed in heavy ion collisions. Comparison with other scenarios is given.