Non-extensivity Parameter in Thermodynamical Model of Hadronic Interactions

Abstract In this paper we used the non-extensive thermodynamical picture of hadronic interaction to examine measured transverse momenta distributions for wide interaction energy range. We determined model parameters and their energy dependencies: one of the parameters V (hadronization volume) scales with the particle multiplicity, another T (temperature in the Boltzmann limit) is constant and the most important non-extensivity parameter q varies smoothly with energy

Large Transverse Momenta in Statistical Models of High Energy Interactions

The creation of particles with large transverse momenta in high energy hadronic collisions is a long standing problem. The transition from small- (soft) to hard- parton scattering `high-pt' events is rather smooth. In this paper we apply the non-extensive statistical framework to calculate transverse momentum distributions of long lived hadrons created at energies from low (sqrt(s)~10 GeV) to the highest energies available in collider experiments (sqrt(s)~2000 GeV). Satisfactory agreement with the experimental data is achieved. The systematic increase of the non-extensivity parameter with energy found can be understood as phenomenological evidence for the increased role of long range correlations in the hadronization process. Predictions concerning the rise of average transverse momenta up to the highest cosmic ray energies are also given and discussed.Comment: 20 pages, 10 figure