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

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arxiv 2307.05930 v1 pith:2OM3XW2V submitted 2023-07-12 hep-ph nucl-th

classification hep-phnucl-th
keywords freeze-outchemicalcollisionparametersrepulsivehadroninteractionmodel
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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 \emph{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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