Charged Particles p T Spectra and the Correlation between p T and all Charged Particles at √S = 900 GeV

Abstract

The transverse momentum (p T ) spectra, covering a region of 0.15–10 GeV/c, of charged particles as well as the correlation between the average transverse momentum and all charged particles (N ch ) in pp collision at 900 GeV/c are investigated. Simulations by hadron production models are compared with the measurements of ALICE Collaboration. Qualitatively, all models’ predictions are in good agreement with experimental data for the p T distributions of invariant yield of all charged hadrons. For the as a function N ch presented in two p T regions, 0.15 < p T < 4 and 0.5 < p T < 4, the EPOS models, and HIJING produced good predictions of the experimental measurements as compared to QGSJETII-04 and Sibyll2.3c. Although the models’ prediction is compatible with the experimental data, none of them is enough comprehensive to provide complete description of all measurements.