Statistical Aspects of High-Energy Nucleus-Nucleus Collisions

by Dr Airton DEPPMAN (Universita' di San Paolo)

Tuesday 27 Sept 2011, 14:30 → 15:30 Europe/Rome

Aula Edificio 22 (Laboratori Nazionali di Frascati)

Transverse momentum distribution as well as particle multiplicity observed in high-energy collisions have been succesfully described by statistical models. This fact shows that there is an intermediate state produced during the collision which reaches thermal-equillibrium before its decay. Hagedorn bootstrap model of fireballs is in good agreement with experimental data for relatively low energy collisions, but fails to reproduce data at higher energies. An extension for Hagedorn's model was proposed including the well-known Tsallis statistics, leading to good agreement with experiment even at energies as high as those obtained at LHC. In this talk we present the main features of Hagedorn model and Tsallis statistics, and discuss the use of the combined Hagedorn-Tsallis model to describe HEP data.