Journal
PHYSICAL REVIEW C
Volume 102, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.102.035202
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Funding
- Target Program of Fundamental Research of the Department of Physics and Astronomy of the National Academy of Sciences of Ukraine [N 0120U100857]
- scientific program Astronomy and space physics of Taras Shevchenko National University of Kyiv [BF19-023-01]
- Feodor Lynen program of the Alexander von Humboldt foundation
- US Department of Energy, Office of Science, Office of Nuclear Physics [DE-AC02-05CH11231]
- Judah M. Eisenberg Laureatus Chair by Goethe University
- Walter Greiner Gesellschaft, Frankfurt
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The role of repulsive interactions in statistical systems of Bose particles is investigated. Three different phenomenological frameworks are considered: a mean-field model, an excluded volume model, and a model with a medium-dependent effective mass. All three models are tuned to yield similar equations of state, with only minor deviations from the ideal Bose gas at small chemical potentials. Our analysis indicates, however, that these models lead to qualitatively different results for the Bose-Einstein condensation phenomenon. We discuss the different aspects of this phenomenon, namely, an onset of the Bose-Einstein condensation, particle number fluctuations, and a behavior of the Bose condensate. The obtained results can be helpful for interpreting the lattice QCD data at small temperature and large isospin chemical potential and the data on multiple pion production in high-energy nuclear collisions.
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