Comparison of strange particle production measurements in central Pb–Pb collisions at $\sqrt {s_{NN} }$ = 2.76 and 5.02 TeV by using Monte Carlo simulation models EPOS-1.99 and EPOS-LHC

Abstract

The present paper is a comparative study of transverse momentum spectra of $K_{s}^{0}$ − mesons, $\Lambda -$ hyperons, multi-strange baryons ${\Xi }^{ - }$, ${\overline{\Xi }}^{ + } ,$ $\Omega^{ - }$ and $\overline{\Omega }^{ + }$ in the most central Pb–Pb collisions at $\sqrt {s_{NN} }$ = 2.76 and 5.02 TeV for the mid rapidity interval $\left| y \right|$< 0.5 by using two different Monte Carlo simulation models, EPOS-1.99 and EPOS-LHC. Particle ratios $\Lambda /K_{s}^{0}$ are studied at the two center-of-mass energies to understand the enhancement of heavier hadrons over the lighter ones. Nuclear modification factors are also constructed for multi-strange baryons at $\sqrt {s_{NN} }$ = 2.76 TeV to study particle production and energy loss mechanisms. The validity of these models is tested for Pb–Pb collisions at $\sqrt {s_{NN} }$ = 2.76 and 5.02 TeV by comparing the simulation data with ALICE experimental data.