Phase Transitions and Bose–Einstein Condensation in Alpha-Nucleon Matter

  • L. M. Satarov Frankfurt Institute for Advanced Studies, National Research Center “Kurchatov Institute”
  • I. N. Mishustin Frankfurt Institute for Advanced Studies, National Research Center “Kurchatov Institute”
  • A. Motornenko Frankfurt Institute for Advanced Studies, Institut f¨ur Theoretische Physik, Goethe Universit¨at Frankfurt
  • V. Vovchenko Frankfurt Institute for Advanced Studies, Institut f¨ur Theoretische Physik, Goethe Universit¨at Frankfurt
  • M. I. Gorenstein Frankfurt Institute for Advanced Studies, Bogolyubov Institute for Theoretical Physics, Nat. Acad. of Sci. of Ukraine
  • H. Stoecker Frankfurt Institute for Advanced Studies, Institut f¨ur Theoretische Physik, Goethe Universit¨at Frankfurt, GSI Helmholtzzentrum f¨ur Schwerionenforschung GmbH
Keywords: phase transitions, mean-field model, Bose–Einstein condensation, chemical equilibrium

Abstract

The equation of state and the phase diagram of an isospin-symmetric chemically equilibrated mixture of a particles and nucleons (N) are studied in the mean-field approximation. We use a Skyrme-like parametrization of mean-field potentials as functions of the partial densities of particles. The parameters of these potentials are chosen by fitting the known properties of pure N- and pure a-matters at zero temperature. The sensitivity of results to the choice of the aN attraction strength is investigated. The phase diagram of the a − N mixture is studied with a special attention paid to the liquid-gas phase transitions and the Bose–Einstein condensation of a particles. We have found two first-order phase transitions, stable and metastable, which differ significantly by the fractions of a’s. It is shown that the states with a condensate are metastable.

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Published
2019-09-18
How to Cite
Satarov, L., Mishustin, I., Motornenko, A., Vovchenko, V., Gorenstein, M., & Stoecker, H. (2019). Phase Transitions and Bose–Einstein Condensation in Alpha-Nucleon Matter. Ukrainian Journal of Physics, 64(8), 745. https://doi.org/10.15407/ujpe64.8.745
Section
New Trends in High-Energy Physics (Conference materials)