Non-extensive transverse momentum distribution for identified particles at S N N = 7. 7, 11.5, 19.6, 27, 39 GeV

Abstract

The transverse momentum distribution of charged particles formed in Au-Au collisions at Beam Energy Scan (BES) (SNN = 7.7, 11.5, 19.6, 27, 39GeV) is investigated. In addition, PT spectra of Δ particle at SNN = 62.4GeV were examined. Tsallis distribution is used to extract the temperature, volume and the entropic index from the experimental results at mid-rapidity and zero chemical potential. We measure some particle ratios like k+ φ+ and Δ φ- which are puzzling horn in the experiment and in the thermal model. We conclude that the horn vanished when we used Tsallis distribution, but this does not confirm a solution to the puzzle, which is primarily visible in the experimental results.