4.6 Article

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

Journal

FRONTIERS IN PHYSICS
Volume 11, Issue -, Pages -

Publisher

FRONTIERS MEDIA SA
DOI: 10.3389/fphy.2023.1257937

Keywords

Tsallis statistics; multisource production; transverse momentum spectra; nuclear modification factor; high-energy heavy-ion collisions

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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.
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.

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