Particle production and chemical freezeout from the hybrid UrQMD approach at NICA energies

2016/09/30 by Abdel Nasser Tawfik, L. I. Abou-Salem, Loutfy I. Abou-Salem +8
Physics and Astronomy · #Baryon #Beam (structure) #Hadron #High-Energy Particle Collisions Research #Nuclear physics #Particle (ecology) #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Resonance (particle physics) #hep-ex #hep-ph #nucl-th

paper · pdf · doi:10.1140/epja/i2016-16324-6

published as Eur. Phys. J. A 52 (2016) 324 · 13 pages, 5 figures, 2 tables, one reference is added and one paragraph is rephrased. To appear in EPJA

arxiv created 2016/09/30 · openalex publication_date 2016/10/01 · openalex created_date 2016/10/07 · arxiv updated 2016/10/24 · openalex updated_date 2026/08/05

Abstract

The energy dependence of various particle ratios is calculated within the Ultra-Relativistic Quantum Molecular Dynamics approach and compared with the hadron resonance gas (HRG) model and measurements from various experiments, including RHIC-BES, SPS and AGS. It is found that the UrQMD particle ratios agree well with the experimental results at the RHIC-BES energies. Thus, we have utilized UrQMD in simulating particle ratios at other beam energies down to 3 GeV, which will be accessed at NICA and FAIR future facilities. We observe that the particle ratios for crossover and first-order phase transition, implemented in the hybrid UrQMD v3.4, are nearly indistinguishable, especially at low energies (at large baryon chemical potentials or high density).

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