Transverse-Mass Spectra in Heavy-Ion Collisions at energies E_{lab} = 2--160 GeV/nucleon

TL;DR

This paper demonstrates that a 3-fluid dynamics model accurately reproduces transverse-mass spectra of protons, pions, and kaons across a wide energy range in heavy-ion collisions, explaining the observed energy dependence of kaon inverse slopes.

Contribution

The study introduces a comprehensive 3-fluid dynamics model that successfully describes transverse-mass spectra and the energy dependence of kaon inverse slopes in heavy-ion collisions.

Findings

Model reproduces spectra across energies 4A to 160A GeV

Explains the 'step-like' behavior of kaon inverse slopes

Highlights the role of hydrodynamic expansion and freeze-out

Abstract

Transverse-mass spectra of protons, pions and kaons produced in collisions of heavy nuclei are analyzed within the model of 3-fluid dynamics. It was demonstrated that this model consistently reproduces these spectra in wide ranges of incident energies E_{lab}, from 4A GeV to 160A GeV, rapidity bins and centralities of the collisions. In particular, the model describes the "step-like" dependence of kaon inverse slopes on the incident energy. The key point of this explanation is interplay of hydrodynamic expansion of the system with its dynamical freeze-out.