Properties of the particle distribution in Pb-Pb collisions at √sNN=5.02 TeV and √sNN=2.76 TeV

Properties of the particle distribution in high energy heavy-ion collisions are important for understanding the particle production. In Tsallis statistics with a multisource production, we study the transverse momentum spectra of D-0, D+, D*+, D-s(+) , J/psi in Pb-Pb collisions at root sNN = 5.02 TeV and charged particles in Pb-Pb collisions at s N N = 2.76 TeV. A good agreement can be observed between the results obtained in the model and the experimental results of ALICE and CMS collaboration. The nuclear modification factor R A A is reproduced. Properties reflected in the multiparticle system are discussed by the parameters provided in the improved model. It is found that the temperature T and the t(ft) / tau increase with the centrality for the same particle due to the excitation degree of the multiparticle system. The non-equilibrium degree at root sNN = 5.02 TeV is larger than that at root sNN = 2.76 TeV. It shows that the system at the larger collision energy deviates farther from the equilibrium state.

Automated summary

Properties of the particle distribution in high energy heavy-ion collisions play a crucial role in understanding the particle production process. Using the Tsallis statistics with a multisource production model, the transverse momentum spectra of various particles in Pb-Pb collisions are successfully reproduced. The parameters provided by the improved model are used to discuss the properties reflected in the multiparticle system.