Speaker
Prof.
Alexandru Jipa
(Atomic and Nuclear Physics Chair, Faculty of Physics, University of Bucharest, Romania)
Description
Recently, we proposed a C# code, namely Chaos Many-Body Engine [1,2], for chaos analysis of relativistic many-body systems with reactions. Preliminary tests using a simplified relativistic nuclear collisions model resulted in some encouraging results for describing global physical quantities obtained in C-C collisions at 4.5 A GeV/c in experiments performed at JINR Synchrophasotron (SKM 200 Collaboration) [3]. The code allows introduction of some additional interactions among particles in the participant region, thus improving the description of the particle production in nucleus-nucleus collisions. The code permits, also, the investigation of time evolution of the collisions, from the initial moment up to the freeze-out. The time evolution step can be below 0,1 Fm/c. Using the possibilities for code development, we try to improve the agreement between our code and existing experimental results. Two collisions will be discussed, namely Cu-Cu at maximum BNL energy, and d-Au at the same energy. The code predictions and experimental results improve the agreement when we include more collisions and particle production mechanisms in the participant region. The time evolution of the fireball is well reflected by our code (Fig.1), for an evolution time between 0,1 and 200 Fm/c.
For the time evolution, code hypotheses do not cover all aspects and some behaviors of the experimental results are not completely described. Work is in progress for improving the agreement with the experimental results.
[1]. I.V.Grossu et al. – Comp.Phys.Comm. 179(1-3)(2008)199, 181(8)(2010)1464, 184(4)(2013)1346
[2]. I.V.Grossu et al. – accepted for publication in Comp.Phys.Comm. 185(2014)
[3]. I.V.Grossu et al. – Annual Scientific Session of the Faculty of Physics, University of Bucharest, 2013
| On behalf of collaboration: | None |
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Primary author
Dr
Ioan Valeriu Grossu
(Atomic and Nuclear Physics Chair, Faculty of Physics, University of Bucharest, Romania)
Co-authors
Prof.
Alexandru Jipa
(Atomic and Nuclear Physics Chair, Faculty of Physics, University of Bucharest, Romania)
Prof.
Calin Besliu
(Atomic and Nuclear Physics Chair, Faculty of Physics, University of Bucharest, Romania)
Dr
Catalin Ristea
(Institute of Space Science, Bucharest-Măgurele, Romania)
Dr
Cristian Bordeianu
(„Ştefan cel Mare” High School Câmpulung Moldovenesc, Suceava County, Romania)
Dr
Daniel Felea
(Institute of Space Science, Bucharest-Măgurele, Romania)
Dr
Emil Stan
(Institute of Space Science, Bucharest-Măgurele, Romania)
Dr
Marius Calin
(Atomic and Nuclear Physics Chair, Faculty of Physics, University of Bucharest, Romania)
Dr
Oana Ristea
(Atomic and Nuclear Physics Chair, Faculty of Physics, University of Bucharest, Romania)
Dr
Tiberiu Esanu
(Atomic and Nuclear Physics Chair, Faculty of Physics, University of Bucharest, Romania)
