PoS - Proceedings of Science
Volume 398 - The European Physical Society Conference on High Energy Physics (EPS-HEP2021) - T05: Heavy Ion Physics
Thermodynamic parameters at kinetic freeze-out in relativistic heavy-ion collisions using Tsallis statistics
R.N. Patra*, B. Mohanty and T. Nayak
Full text: pdf
Pre-published on: February 24, 2022
Published on: May 12, 2022
Thermodynamic properties of the hot and dense system
produced in relativistic heavy-ion collisions have been studied by analyzing the
transverse momentum ($p_{\rm T}$) spectra of emitted particles
(pions, kaons, and protons). The spectra are fitted using the non-extensive Tsallis statistics.
The fit parameters, $q$ and $T$, provide the degree of deviation of the system from
an equilibrium state and the effective temperature at freeze-out, respectively.
These parameters are presented as a function of collision energy, collision centrality, and different fit
ranges in $p_{\rm T}$ for available experimental data at Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC) energies.
An anti-correlation between the two fit parameters has been observed.
With the increase of the collision energy, $q$ increases in a systematic manner whereas $T$ has a decreasing trend.
For central collisions, $q$ and $T$ have a strong dependence on the fitting ranges of $p_{\rm T}$, however, for peripheral collisions there is a minor dependency on $p_{\rm T}$. The Tsallis parameters are found to have mass ordering, which needs further investigation with the inclusion of radial flow.
DOI: https://doi.org/10.22323/1.398.0281
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