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arXiv · 1609.08423

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

Abdel Nasser Tawfik·Loutfy I. Abou-Salem·Asmaa G. Shalaby·Mahmoud Hanafy·Alexander Sorin·Oleg Rogachevsky·Werner Scheinast
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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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Abdel Nasser Tawfik, Loutfy I. Abou-Salem, Asmaa G. Shalaby, Mahmoud Hanafy, Alexander Sorin, Oleg Rogachevsky, Werner Scheinast. 2016-09-08. Particle production and chemical freezeout from the hybrid UrQMD approach at NICA energies. https://doi.org/10.1140/epja/i2016-16324-6

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