Chemical freeze-out parametrization with mean field repulsive hadron resonance gas model

2023/07/12 by Singh, Sunny Kumar, Sarkar, Nachiketa, Biswas, Deeptak
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th)

paper · doi:10.48550/arxiv.2307.05930

Abstract

We have examined the chemical freeze-out surface of the heavy-ion collision experiments within an interacting hadron resonance gas model. By considering repulsive interaction among hadrons in the mean-field level, we have suitably parameterized the freeze-out surface by fitting the yield data of mid-rapidity for the most central collision, for the collision energy available in AGS, RHIC (BES), and LHC programs. To suitably account for the repulsive interaction among mesons and (anti-) baryons, we have introduced phenomenological parameters K_M and K_B in the freeze-out parametrization. Although a finite value of these two parameters seem to be necessary to have an improved normalized chi-square, the effect on the rest of the parameters like temperature and relevant chemical potentials seem to be within the standard variance.

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