Multiplicity dependence of strange and multi-strange hadrons in p–p, p–Pb and Pb–Pb collisions at LHC energies using Tsallis–Weibull formalism

Abstract

The transverse momentum (pT ) distribution of strange hadrons (K 0 S and Λ) and multi-strange hadrons( Ξ and Ω) measured in p−p, p−Pb, and Pb−Pb collisions at LHC energies have been studied for different multiplicity classes using Tsallis-Weibull (or q−Weibull) formalism. The distribution describes the measured pT spectra for all multiplicity (or centrality) classes. The multiplicity dependence of the extracted parameters are studied for the mentioned collisions systems. The λ parameter was observed to increase systematically with the collision multiplicity and follows a mass hierarchy for all collision system. This characteristic feature indicates that λ can be associated to the strength of collectivity for heavy ion collisions. It can also be related to strength of dynamic effects such as multi-partonic interactions and color reconnections which mimic collectivity in smaller systems. The non-extensive q parameter is found to be greater than one for all the particles suggesting that the strange particles are emitted from a source which is not fully equilibrated.