Azimuthally integrated HBT parameters for charged pions in nucleus-nucleus interactions versus collision energy

TL;DR

This study analyzes how the space-time characteristics of pion emission in nucleus-nucleus collisions vary with collision energy, finding minimal changes above 5 GeV and providing smooth approximations for HBT parameters across energies.

Contribution

The paper introduces an analytic function to smoothly approximate the energy dependence of HBT parameters in nucleus-nucleus collisions, extending predictions to LHC and FCC energies.

Findings

HBT parameters show no dramatic change above 5 GeV

Energy dependence of emission duration is nearly flat

Analytic fits agree well with experimental data

Abstract

In the paper energy dependence of space-time extent of emission region obtained from Bose - Einstein correlations is studied for charged pions in various ion collisions for all experimentally available energies. There is no dramatic change of HBT parameters with increasing of collision energy per nucleon-nucleon pair, $\sqrt{s_{NN}}$, in domain of energies $\sqrt{s_{NN}} \geq 5$ GeV. Energy dependence of estimations for emission duration is almost flat for all energy domain under study within large error bars. Analytic function is suggested for smooth approximation of energy dependence of main HBT parameters. Fit curves demonstrate reasonable agreement with experimental data for most HBT parameters in energy domain $\sqrt{s_{NN}} \geq 5$ GeV. Estimations of some observables are obtained for energies of the LHC and FCC project.