Dependence of Freeze-Out Parameters on Collision Energies and Cross-Sections

We analyzed the transverse momentum spectra (pT) reported by NA61/SHINE and NA49 experiments in inelastic proton–proton (pp) central Lead–Lead (Pb?Pb), Argon–Scandium (Ar?Sc), Beryllium–Beryllium (Be?Be) collisions with Blast-wave model Boltzmann–Gibbs (BWBG) statistics. The BGBW was good agreement experimental data. were able to extract flow velocity (?T), kinetic freeze-out temperature (T0), volume (V) from pT using model. Furthermore, we also obtained initial (Ti) mean (<pT>) alternative method. observed that T0 increases increasing collision energy cross-section, representing colliding system’s size. remain invariant energy, while it showed a random change different cross-sections. In same way, increased an increase or cross-section. behavior seen temperature, which At chemical freeze-out, determined both potential compared these hadron resonance gas (HRG) report there is excellent HRG various experiments, reveals ability of fit function manifest features freeze-out.