A Unified Approach towards Describing Rapidity and Transverse Momentum Distributions in Thermal Freeze-Out Model

TL;DR

This paper presents a unified thermal freeze-out model that simultaneously describes rapidity and transverse momentum distributions of hadrons in ultra-relativistic nuclear collisions, incorporating hydrodynamic flow and resonance decays.

Contribution

It introduces a single-parameter statistical model that accounts for both longitudinal and transverse flow, improving the understanding of particle spectra in nuclear collisions.

Findings

Successful simultaneous description of rapidity and transverse momentum spectra.

Highlighting the importance of resonance decays in particle spectra.

Demonstrating the role of hydrodynamic flow in thermal freeze-out models.

Abstract

We have attempted to describe the rapidity and transverse momentum spectra, simultaneously, of the hadrons produced in the Ultra-relativistic Nuclear Collisions. This we have tried to achieve in a single statistical thermal freeze-out model using single set of parameters. We assume the formation of a hadronic gas in thermo-chemical equilibrium at the freeze-out. The model incorporates a longitudinal as well as a transverse hydrodynamic flow. We have also found that the role of heavier hadronic resonance decay is important in explaining the particle spectra.