Transverse Momentum Distributions of Positively Charged Mesons and Light Fragments Produced in Pb-Pb Collisions at 2.76 TeV
Transverse momentum distributions of positively charged mesons (positive pions $\pi^+$ and positive kaons $K^+$), baryons (protons $p$), and light fragments (deuterons $d$ and one of helium isotopes $^3$He) produced in mid-rapidity interval ($|y|<0.5$) in lead-lead (Pb-Pb) collisions with different centrality intervals, measured by the ALICE Collaboration at center-of-mass energy per nucleon pair $\sqrt{s_{NN}}=2.76$ TeV, are uniformly and approximately described by the Tsallis statistics. The dependences of parameteres (effective temperature, entropy index, and normalization constant) on centrality and rest mass are obtained. The source temperature and particle transverse (or radial) flow velocity at the kinetic freeze-out of the interacting system are obtained from the relations between effective temperature and rest mass as well as mean transverse momentum and rest mass, respectively.