Identical-particle (pion and kaon) femtoscopy in Pb$-$Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV with Therminator2 modeled with (3+1)D viscous hydrodynamics

TL;DR

This study analyzes femtoscopic correlations of pions and kaons in Pb-Pb collisions at 5.02 TeV using (3+1)D viscous hydrodynamics and statistical hadronization, revealing collective behavior and scaling of femtoscopic radii.

Contribution

It introduces a detailed 3D femtoscopic analysis of pions and kaons in high-energy collisions using viscous hydrodynamics combined with THERMINATOR 2, highlighting collective effects.

Findings

Femtoscopic radii decrease with increasing pair transverse momentum.

Strong collectivity indicated by the radii trends.

Observed scaling of radii with pair transverse mass.

Abstract

The three-dimensional femtoscopic correlations of pions and kaons are presented for Pb$-$Pb collisions at \rootsNN = 5.02 TeV within the framework of (3+1)D viscous hydrodynamics combined with THERMINATOR 2 code for statistical hadronization. The femtoscopic radii for pions and kaons are obtained as a function of pair transverse momentum and centrality in all three pair directions. The radii showed a decreasing trend with an increase of pair transverse momentum and transverse mass for all centralities. These observations indicate the presence of strong collectivity. A simple effective scaling of radii with pair transverse mass was observed for both pion and kaons.