Systematic analysis of transverse momentum distribution and   non-extensive thermodynamics theory
  A systematic analysis of transverse momentum distribution of hadrons produced in ultra-relativistic $p+p$ and $A+A$ collisions is presented. We investigate the effective temperature and the entropic parameter from the non-extensive thermodynamic theory of strong interaction. We conclude that the existence of a limiting effective temperature and of a limiting entropic parameter is in accordance with experimental data. 
I. Sena and A. Deppman
hep-ph nucl-th