Study of thermal properties of the medium produced in Au + Au collisions at sNN = 19.6 GeV 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 sNN=19.6 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 χ2 minimization technique is employed to obtain thermal properties. We also obtain thermal properties with strangeness conversation condition and at zero potentials μB/T=μS/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 χ2/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.