Universal scaling of kinetic freeze-out parameters across different collision systems at LHC energies |
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Authors: | Lian Liu Zhong-Bao Yin Liang Zheng |
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Institution: | 1. School of Mathematics and Physics, China University of Geosciences (Wuhan), Wuhan 430074, China2. Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, Wuhan 430079, China |
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Abstract: | In this study, we perform 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 varying with event multiplicity are investigated across these systems. We find that the extracted kinetic freeze-out temperature, radial flow velocity, and non-extensive parameter exhibit a universal scaling behavior for these systems with very different geometric sizes, 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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Keywords: | Blast-Wave model Tsallis statistics transverse momentum spectra small system |
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