/ nucl-th ECTP-2016-02


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


Tawfik, Nasser Abdel (WLCAPP, Cairo) ; Abou-Salem, Loutfy I. (Benha U.) ; Shalaby, Asmaa G. (Benha U.) ; Hanafy, Mahmoud (Benha U.) ; Sorin, Alexander (LHEP JINR, Dubna) ; Rogachevsky, Oleg (LHEP JINR, Dubna) ; Scheinast, Werner (LHEP JINR, Dubna)

Published in: Eur.Phys.J.
Year: 2016
Vol.: A52    Num./Issue: 10
Page No: 324
Pages: 14
Year: 2016-10-26 published

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 3GeV, 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).
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).

Web-Page: http://inspirehep.net/record/1488281/files/lamdapionm4.png; http://inspirehep.net/record/1488281/files/NICA_Freezeout1.png; http://inspirehep.net/record/1488281/files/antiprotonproton4.png; http://inspirehep.net/record/1488281/files/antilamdalamda4.png; http://inspirehep.net/record/1488281/files/kaonmkaonp4.png; http://inspirehep.net/record/1488281/files/kaonmpionm4.png; http://inspirehep.net/record/1488281/files/kaonppionp4.png; http://inspirehep.net/record/1488281/files/ratios3expfirst.png; http://inspirehep.net/record/1488281/files/ratios3expcross.png; http://inspirehep.net/record/1488281/files/ratios5expcross.png; http://inspirehep.net/record/1488281/files/ratios5expfirst.png; http://inspirehep.net/record/1488281/files/ratios11expfirst.png; http://inspirehep.net/record/1488281/files/ratios7expfirst.png; http://inspirehep.net/record/1488281/files/ratios9exp4cross.png; http://inspirehep.net/record/1488281/files/ratios13exp4cross.png; http://inspirehep.net/record/1488281/files/ratios19expfirst.png; http://inspirehep.net/record/1488281/files/ratios7_7exp4cross.png; http://inspirehep.net/record/1488281/files/ratios19_6exp4cross.png; http://inspirehep.net/record/1488281/files/ratios11_5exp4cross.png; http://inspirehep.net/record/1488281/files/antiprotonpionm4.png; http://inspirehep.net/record/1488281/files/omegapionm4.png; http://inspirehep.net/record/1488281/files/pionmpionp4.png; http://inspirehep.net/record/1488281/files/antixayxay4.png; http://inspirehep.net/record/1488281/files/arXiv:1609.08423.pdf


Note: 13 pages, 5 figures, 2 tables, one reference is added and one paragraph is rephrased. To appear in EPJA

Total numbers of views: 180
Numbers of unique views: 85
DOI: 10.1140/epja/i2016-16324-6
 Record created 2016-11-09, last modified 2016-11-09


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