Description of high-energy pp collisions using Tsallis thermodynamics: Transverse momentum and rapidity distributions

作者：Marques L^*; Cleymans J; Deppman A

来源：Physical Review D - Particles, Fields, Gravitation and Cosmology, 2015, 91(5): 054025.

DOI：10.1103/PhysRevD.91.054025

A systematic analysis of transverse momentum and rapidity distributions measured in high-energy proton- proton ( pp) collisions for energies ranging from 53 GeV to 7 TeV using Tsallis thermodynamics is presented. The reasonable description of all transverse momentum spectra obtained in earlier analyses is confirmed and extended. All energies can be described by a single Tsallis temperature of 68 5 MeV at all beam energies and particle types investigated ( 43 in total). The value of the entropic index, q, shows a wider spread but is always close to q 1.146. These values are then used to describe the rapidity distributions using a superposition of two Tsallis fireballs along the rapidity axis. It is concluded that the hadronic system created in high- energy pp collisions between 53 GeV and 7 TeV can be seen as obeying Tsallis thermodynamics.

• 出版日期2015-3-23