Kaon and pion femtoscopy at top RHIC energy in hydrokinetic model

TL;DR

This paper uses the hydrokinetic model to analyze pion and kaon femtoscopy in central Au+Au collisions at top RHIC energy, successfully reproducing spectra and interferometry radii across the studied momentum range.

Contribution

It demonstrates the hydrokinetic model's ability to accurately describe femtoscopic data and initial conditions using different energy density profiles.

Findings

Good reproduction of pion and kaon spectra

Accurate modeling of interferometry radii

Different initial energy densities for Glauber and CGC profiles

Abstract

The hydrokinetic model is applied to restore the initial conditions and space-time picture of the matter evolution in central Au+Au collisions at the top RHIC energy. The analysis is based on the detailed reproduction of the pion and kaon momentum spectra and femtoscopic data in whole interval of the transverse momenta studied by both STAR and PHENIX collaborations. A good description of the pion and kaon transverse momentum spectra and interferometry radii is reached with both initial energy density profiles motivated by the Glauber and Color Glass Condensate (CGC) models, however, at different energy densities.