Thermal, chemical and spectral equilibration in heavy-ion collisions

2014/07/31 by Gábor Almási, Gábor András Almási, G. Wolf +1 · 1 citation
Engineering · Physics and Astronomy · #Atomic physics #Boltzmann constant #Boltzmann equation #Collision #Heavy ion #High-Energy Particle Collisions Research #Ion #Nuclear physics #Nuclear reactor physics and engineering #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Spectral line #Thermal #Thermodynamics #hep-ex #hep-ph #nucl-ex #nucl-th

paper · pdf · doi:10.1016/j.nuclphysa.2015.09.003

published as Nucl. Phys. A943 (2015) 117-136 · 23 pages, 19 figures

openalex publication_date 2015/09/16 · arxiv created 2015/09/28 · arxiv updated 2015/09/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We have considered the equilibration in a relativistic heavy ion collision using our transport model. We applied periodic boundary conditions to close the system in a box. We found that the thermal equilibration takes place in the first 20-40 fm/c which time is comparable to the duration of a heavy ion collision. The chemical equilibration is a much slower process and the system does not equilibrate in a heavy ion collision. We have also shown that the mass spectra of broad resonances immediately follows their in-medium spectral functions.

Citations

• Propagation of vector-meson spectral-functions in a BUU type transport model: Application to di-electron production
• Particle ratios at SPS, AGS and SIS
• Exact Conservation Laws of the Gradient Expanded Kadanoff–Baym Equations
• Equation of state, spectra, and composition of hot and dense infinite hadronic matter in a microscopic transport model
• Semiclassical transport of particles with dynamical spectral functions
• Microscopic models for ultrarelativistic heavy ion collisions
• Review of particle properties

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• Quartic cumulant of baryon number in the presence of a QCD critical point