Monte Carlo Predictions for the Production of Primary and Strange Hadrons at LHC Energies and Study of the Thermal Properties of System

The production of primary charged particles π ^± , K^± , p, p , ϕ (1020) , strange particles K^0_S , K^*0 , Λ , Λ and multi-strange particles Ξ ^± and Ω ^± are investigated in proton–proton (pp) collision at √(s_NN)= 7 TeV and 13 TeV . Particle production is simulated using different color reconnection modes (CR1, CR2, CR3 and CR4) of the PYTHIA8 Monte Carlo event generator in the midrapidity region of |y| < 0.5 and in transverse momentum range of 0< p_T < 20 GeV/c . The HIJING 2.0 predictions are also investigated in the same kinematic regions. The simulated data is compared with the ALICE data to check the validity of the results. The baryon to meson ratio gives a clear picture of flow effects at low p_T values as confirmed by the CR modes. To study the thermal properties of the system, the modified Hagedorn distribution function is used to extract the freeze-out temperature. The minimum χ ^2 fit performed on the p_T spectra is considered as the best fit.