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arXiv · 2211.08103

The universal scaling of kinetic freeze-out parameters across different collision systems at the LHC energy

Lian Liu·Zhong-Bao Yin·Liang Zheng
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Abstract

In this paper, we perform the Tsallis Blast-Wave analysis on the transverse momentum spectra of identified hadrons produced in a wide range of collision systems at the Large Hadron Collider (LHC) including pp, pPb, XeXe and PbPb collisions. The kinetic freeze-out properties are investigated across these systems varying with the event multiplicity. We find that the extracted kinetic freeze-out temperature, radial flow velocity and the non-extensive parameter exhibit a universal scaling behavior for these systems with very different geometric size, especially when the independent baryon Tsallis non-extensive parameter is considered. This universality may indicate the existence of a unified partonic evolution stage in different collision systems at the LHC energies.

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Lian Liu, Zhong-Bao Yin, Liang Zheng. 2022-11-15. The universal scaling of kinetic freeze-out parameters across different collision systems at the LHC energy. https://doi.org/10.1088/1674-1137/aca38d

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