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Comparison of the 3-Fluid Dynamic Model with Experimental Data

The article considers a way to compare large bulks of experimental data with theoretical calculations, in which the quality of theoretical models is clearly demonstrated graphically. The main idea of the method consists in grouping physical observables, represented by experiment and theoretical calculation, into samples, each of which characterizes a certain physical process. A further choice of a convenient criterion for comparing measurements and calculations, its calculation and averaging within each sample and then over all samples, makes it possible to choose the best theoretical model in the entire measurement area. Modern analysis of experimental data and their comparison with calculations in the search for exotic states of nuclear matter, where a huge amount of material has been accumulated over several decades, is still largely carried out by eye. Published theoretical data of the three-fluid dynamic model (3FD) applied to the experimental data from heavy-ion collisions at the energy range sNN = 2.7 - 63 GeV are used as example of application of the developed methodology. When analyzing the results, the quantum nature of the fireball, created at heavy ion collisions, was taken into account. Thus, even at energy sNN = 63 GeV of central collisions of heavy ions, there is a nonzero probability of fireball formation without ignition of the quark-gluon plasma (QGP). At the same time, QGP ignition at central collision energies above at least sNN = 12 GeV occurs through two competing processes, through a first-order phase transition and through a smooth crossover. That is, in nature, these two possibilities are realized, which occur with approximately the same probabilities. Modern experiment and theory not only does not consider a fireball, born in collisions of relativistic heavy ions, as a quantum object that can have different quantum states with the same energy pumped into it, but the processing of experimental data itself does not provide for the imposition of any triggers to separate these states from each other. This work takes into account the quantum nature of the fireball and the need to analyze all the information accumulated over decades at once.

Relative Criterion, Chi-Square, Heavy Ion Collisions, Deconfined Matter, QGP, Hadronic Matter, Smooth Crossover, Superposition of Quantum States

APA Style

Valeriy Kizka. (2023). Comparison of the 3-Fluid Dynamic Model with Experimental Data. Nuclear Science, 7(3), 39-44.

ACS Style

Valeriy Kizka. Comparison of the 3-Fluid Dynamic Model with Experimental Data. Nucl. Sci. 2023, 7(3), 39-44. doi: 10.11648/j.ns.20220703.11

AMA Style

Valeriy Kizka. Comparison of the 3-Fluid Dynamic Model with Experimental Data. Nucl Sci. 2023;7(3):39-44. doi: 10.11648/j.ns.20220703.11

Copyright © 2022 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License ( which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

1. H. S. Matis et al. (DLS Collaboration). Dilepton production from p-p to Ca-Ca at the Bevalac. Nucl. Phys. A 583 (1995) 617C-622C. arXiv: nucl-ex/9412001.
2. H. Appelshaeuser et al. (NA49 Collaboration). Directed and Elliptic Flow in 158 GeV/Nucleon Pb + Pb Collisions. Phys. Rev. Lett. 80 (1998) 4136-4140. arXiv: nucl-ex/9711001.
3. H. Appelshaeuser et al. (NA49 Collaboration). Xi and Xi-bar Production in 158 GeV/Nucleon Pb+Pb Collisions. Phys. Lett. B 444 (1998) 523-530. arXiv: nucl-ex/9810005.
4. T. Anticic et al. (NA49 Collaboration). Λ and Λ-bar Production in Central Pb-Pb Collisions at 40, 80, and 158 A⋅GeV. Phys. Rev. Lett. 93 (2004) 022302. arXiv: nucl-ex/0311024.
5. Roger Lacasse (For the E877 Collaboration). Hadron yields and spectra in Au+Au collisions at the AGS. Nucl. Phys. A 610 (1996) 153c-164c. arXiv: nucl-ex/9609001.
6. The STAR Collaboration. First Observation of Directed Flow of Hypernuclei and in sNN = 3 GeV Au+Au Collisions at RHIC. 2022. arXiv: 2211.16981.
7. The STAR Collaboration. K∗0 production in Au+Au collisions at sNN = 7.7, 11.5, 14.5, 19.6, 27 and 39 GeV from RHIC beam energy scan. 2022. arXiv: 2210.02909.
8. M. S. Abdallah et al. (STAR Collaboration). Probing Strangeness Canonical Ensemble with K, ϕ(1020) and Ξ Production in Au+Au Collisions at sNN = 3 GeV. Physics Letters B 831 (2022) 137152. arXiv: 2108.00924.
9. Tom Reichert et al. Comparison of heavy ion transport simulations: Ag+Ag collisions at Elab = 1.58 AGeV. J. Phys. G: Nucl. Part. Phys. 49 (2022) 055108. arXiv: 2111.07652.
10. Khvorostukhin, A. S., Kolomeitsev, E. E. & Toneev, V. D. Hybrid model with viscous relativistic hydrodynamics: a role of constraints on the shear-stress tensor. Eur. Phys. J. A 57 (2021) 294. arXiv: 2104.14197.
11. Kizka V. A., Trubnikov V. S., Bugaev K. A., Oliinychenko D. R. A possible evidence of the hadron-quark-gluon mixed phase formation in nuclear collisions. 2015. arXiv: 1504.06483 [hep-ph].
12. Khvorostukhin A. S., Skokov V. V., Redlich K. and Toneev V. D. Lattice QCD Constraints on the Nuclear Equation of State. Eur. Phys. J. C 48 (2006) 531-543; arXiv: nucl-th/0605069.
13. Galitsky V. M. and Mishustin I. N. Relativistic effects in collision of heavy ions. Sov. J. Nucl. Phys. 29 (1979) 181.
14. Ivanov Yu. B. Alternative Scenarios of Relativistic Heavy-Ion Collisions: I. Baryon Stopping. Phys. Rev. C 87 (2013) 064904; arXiv: 1302.5766.
15. Ivanov Yu. B. Alternative Scenarios of Relativistic Heavy-Ion Collisions: II. Particle Production. Phys. Rev. C 87 (2013) 064905; arXiv: 1304.1638.
16. Ivanov Yu. B., Soldatov A. A. Directed Flow Indicates a Crossover Deconfinement Transition in Relativistic Nuclear Collisions. Phys. Rev. C 91 (2015) 024915; arXiv: 1412.1669.
17. Kizka V. A. On the Quantum Nature of a Fireball Created in Ultrarelativistic Nuclear Collisions. NFPSR-V1 (2022) 52-62; arXiv: 2210.04602.
18. Ivanov Y. B., Soldatov A. A. What can we learn from the directed flow in heavy-ion collisions at BES RHIC energies. Eur. Phys. J. A 52, 10 (2016); arXiv: 1601.03902.