Estimation of the freezeout parameters using strange hadrons with changing multiplicity in pp collisions at 7 TeV.

We explore the spectra of transverse momenta of hadrons with strange quark content ( K S 0 , ϕ , Λ + Λ ̄ , Ξ ̄ + Ξ ̄ + , and Ω − + Ω ̄ + ) produced in proton–proton collisions at s N N = 7 TeV. We applied Tsallis statistics in a blast wave model (T B W) to the ALICE Collaboration's experimental data and extracted the freezeout parameters (Tsallis temperature, transverse flow velocity, and the parameter q , which is the non-extensive parameter). The changing trend of these parameters is studied with changing multiplicity. The parameter q decreases while the parameter T and β T increases toward higher multiplicities. β T is noted to drop to zero in the system with the lowest multiplicities. In addition, the interrelationships between the parameters T with β T and T with q are presented where the former correlation is positive and the latter one is negative. [ABSTRACT FROM AUTHOR]