Kinetic Freeze-out Properties of Charm-strange Mesons in Au+Au Collisions at 200 GeV

BAI Hui, LI Baochun

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Journal of Shanxi University(Natural Science Edition) ›› 2025, Vol. 48 ›› Issue (3) : 550-557. DOI: 10.13451/j.sxu.ns.2023147
Physics

Kinetic Freeze-out Properties of Charm-strange Mesons in Au+Au Collisions at 200 GeV

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Abstract

The transverse momentum spectra of charm-strange meson DS ± by model research in Au + Au collisions at 200 GeV is studied. The non-extensive Tsallis statistic model, Blast-wave model and Tsallis Blast-wave model are applied to analyze the particle distributions in various centrality bins. They are compared with the STAR experiment results. The appropriate range of the transverse momentum and the kinetic freeze-out parameters in each model are studied. The non-extensive parameter q and the kinetic freeze-out temperature rise with the centrality percentage. The mean radial flow decreases with the centrality percentage. Fireballs produced in central collisions survive longer and have a longer evolution time than those produced in peripheral collisions. Compared with the light hadrons, DS ± freeze out earlier and has smaller radial velocity and higher kinetic freeze-out temperature. Particles are created in earlier stage due to the larger mass and carry the information of Quark-Gluon Plasma （QGP). These freeze-out properties can help us to better understand the evolution of the matter in high-energy nucleus collisions.

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nucleus-nucleus collision at high energies / Tsallis Blast-wave model / DS ± spectra / kinetic freeze-out

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BAI Hui , LI Baochun. Kinetic Freeze-out Properties of Charm-strange Mesons in Au+Au Collisions at 200 GeV. Journal of Shanxi University(Natural Science Edition). 2025, 48(3): 550-557 https://doi.org/10.13451/j.sxu.ns.2023147

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