The effect of flow on Hadronic Spectra in an Excluded-Volume Model

TL;DR

This paper investigates how flow influences hadronic spectra within an excluded-volume model, comparing model predictions with experimental data across a broad energy range and examining various particle production mechanisms.

Contribution

It introduces a thermodynamically consistent excluded-volume model that describes hadron production, flow effects, and volume variations across different energies, validated against experimental results.

Findings

Model accurately reproduces freeze-out volumes from HBT data.

Predicts rapidity and transverse momentum spectra consistent with experiments.

Extends analysis to light nuclei and hypernuclei production across energies.

Abstract

Recently, we proposed a thermodynamically consistent excluded-volume model for the HG fireball and we noticed that our model gives a suitable description for various properties of multiparticle production and their ratios in the entire range of temperatures and baryon densities. The aim in this paper is to obtain the variations of freeze-out volume in a slice of unit rapidity i.e. $dV/dy$ as well as total volume of the fireball with respect to center-of-mass energy $(\sqrt{s_{NN}})$ and confront our model calculations with the corresponding thermal freeze-out volume obtained from the Hanbury-Brown-Twiss (HBT) pion interferometry method. We also test the validity of our model in extracting the total multiplicities as well as the central rapidity densities of various hadrons and comparing them with the recent results. We further calculate the rapidity as well as transverse momentum spectra of various particles produced in different heavy-ion collider experiments in order to examine the role of flow by matching our predictions suitably with the available experimental results. Finally, we extend our analysis for the production of light nuclei, hypernuclei and their antinuclei over a broad energy range from Alternating Gradient Synchrotron (AGS) to Large Hadron Collider (LHC) energies.