Transverse momentum and nuclear modification factor distributions of charged particles in p + Pb and p+p collisions at sNN = 5.02 TeV.

Transverse momentum distributions and nuclear modification factor of integrated charged particles yield produced in p + Pb collisions at s N N = 5.02 TeV are investigated in mid-rapidity regions of − 0. 5 < y < 0 at one event multiplicity class 0–5% in the transverse momentum range of 0 < p T < 20 GeV/c. Simulations with EPOS-1.99, EPOS-LHC and QGSJETII-04 are compared with the ALICE data. All three models are in good agreement with each other up to p T ∼ 3 GeV/c for transverse momentum distributions but after that QGSJETII-04 overpredicts the experimental data. EPOS-LHC seems to describe the experimental data quite well as compared to the other two models. The ratios of the kaons to pions and protons to pions are also presented where again EPOS-LHC provides good agreement with the ALICE data. In case of the nuclear modification factor, for (anti) pions and (anti) kaons, the model distribution is around 1, whereas it is greater than 1 in case of (anti) protons which shows Cronin enhancement. [ABSTRACT FROM AUTHOR]