Chemical freeze-out conditions in hadron resonance gas
V. Vovchenko, M.I. Gorenstein, L.M. Satarov, H. Stoecker
TL;DR
This paper investigates the chemical freeze-out conditions in heavy-ion collisions using a hadron resonance gas model with eigenvolume corrections, fitting data across multiple experiments and energies to understand the impact of these corrections.
Contribution
It introduces a hadron-type dependent eigenvolume correction in the hadron resonance gas model and applies it to a wide range of experimental data.
Findings
Eigenvolume corrections significantly influence freeze-out parameter extraction.
The model successfully fits data from SPS, RHIC, and LHC energies.
Eigenvolume effects vary with hadron type and collision energy.
Abstract
The hadron resonance gas model with hadron-type dependent eigenvolume corrections is employed to fit the hadron yield data of the NA49 collaboration for central Pb+Pb collisions at the c.m. energy per nucleon pair Ecm=6.3, 7.6, 8.8, 12.3, and 17.3 GeV, the hadron midrapidity yield data of the STAR collaboration for Au+Au collisions at Ecm=200 GeV, and the hadron midrapidity yield data of the ALICE collaboration for Pb+Pb collisions at Ecm=2760 GeV. The influence of the eigenvolume corrections is studied.
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Taxonomy
TopicsHigh-Energy Particle Collisions Research · Quantum Chromodynamics and Particle Interactions · Particle physics theoretical and experimental studies