Elliptic flow of identified particles in Pb-Pb collisions at $\sqrt{s_{NN}}=5.02$ TeV

TL;DR

This study investigates the elliptic flow of various identified particles in Pb-Pb collisions at 5.02 TeV using a thermal model and Tsallis-Pareto functions, revealing how geometric and dynamic effects influence particle azimuthal anisotropy.

Contribution

It introduces a combined approach using the multisource thermal model and Tsallis-Pareto functions to analyze elliptic flow in high-energy heavy-ion collisions, highlighting dynamic deformation effects.

Findings

Elliptic flow depends on transverse momentum.

Anisotropy arises from geometric and thermal effects.

Model successfully describes azimuthal distribution.

Abstract

In this paper, by using a Tsallis-Pareto-type function and the multisource thermal model, the elliptic flow coefficients of particles $\pi ^{\pm }$, $K^{\pm }$, $p+\overline{p}$, $\Lambda +\overline{% \Lambda }$, and $K_{S}^{0}$ produced in Pb-Pb collisions at the center-of-mass energy of $\sqrt{s_{NN}}=5.02$ TeV are investigated. In the process of collisional evolution, because of geometric structure, pressure gradient, and thermal diffusion effects, deformation and translation occurred in the isotropic emission source, leading to anisotropy in the azimuth distribution of the final-state particles. Based on these dynamic factors, the dependence of elliptic flow on transverse momentum is described as well.