Study of thermal properties of the medium produced in Au+Au collisions at sNN = 19.6GeV using a thermal model.

In this paper, we present the thermal properties of the medium formed in ultra-relativistic heavy-ion collisions at chemical freeze-out using a thermal model. Experimental data of various hadron species from 0–5% most central Au + Au collisions at s N N = 1 9. 6 GeV from the STAR BES program are used to analyze the thermal properties, namely chemical freeze-out temperature, baryon chemical potential and strangeness chemical potential. A χ 2 minimization technique is employed to obtain thermal properties. We also obtain thermal properties with strangeness conversation condition and at zero potentials μ B ∕ T = μ S ∕ T = 0. We compared particle ratios from the thermal model with the experimental data. The thermal model describes particle ratios within ± 2 standard deviations and χ 2 ∕ NDF between 1–2. We discuss collision energy dependence of thermodynamic properties of the medium at freeze-out and compare results with the published STAR results and other thermal model calculations. [ABSTRACT FROM AUTHOR]