Speaker
Description
In this work, we have presented the collision energy, multiplicity and system size dependence of chemical freeze-out parameters such as chemical freeze-out temperature ($T_{\rm ch}$) and strangeness saturation factor ($\gamma_{s}$). These parameters are obtained by analysing the particle ratios at different Large Hadron Collider (LHC) energies using statistical thermal model (THERMUS). Here, we consider the particle ratios obtained recently in pp collisions at $\sqrt{s}$ = 13 TeV, p+Pb at $\sqrt{s_{\rm NN}}$ = 5.02 TeV, Xe+Xe at $\sqrt{s_{\rm NN}}$ = 5.44 TeV and Pb+Pb at $\sqrt{s_{\rm NN}}$ =5.02 TeV. In addition, we look into the energy dependence of chemical freeze-out parameters by comparing with pp collisions at $\sqrt{s}$ = 7 TeV and Pb+Pb at $\sqrt{s_{\rm NN}}$ =2.76 TeV results in our study. The particle production from small to large systems has been addressed by considering two ensembles namely, canonical and grand canonical. The results obtained in this study shows a clear multiplicity dependence of $T_{\rm ch}$ and $\gamma_{s}$. The values obtained in high multiplicity pp collisions are similar to the peripheral Pb+Pb collisions. In future, high multiplicity triggered pp events will add more insight about the strangeness chemical equilibrium and to understand the particle production mechanism in smaller collision systems.
