Influence of phase-transition scenarios on the abrupt changes in the characteristics of compact stars

We study the abrupt changes in the characteristics of compact stars due to the quark deconfinement phase transition. The hadronic phase is described within the relativistic mean-field theory, including a scalar-isovector δ-meson effective field. To describe the quark phase, we use the MIT bag model,...

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Bibliographic Details
Published in:Journal of physics. Conference series 2014-01, Vol.496 (1), p.12001-6
Main Author: Alaverdyan, G B
Format: Article
Language:English
Subjects:
Approximation
Equilibrium conditions
Exchange
Gluons
Mathematical analysis
Mathematical models
Mean field theory
Phase transformations
Phase transitions
Physics
Quarks
Relativistic theory
Stars
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Summary:We study the abrupt changes in the characteristics of compact stars due to the quark deconfinement phase transition. The hadronic phase is described within the relativistic mean-field theory, including a scalar-isovector δ-meson effective field. To describe the quark phase, we use the MIT bag model, in which the interactions between u, d and s quarks inside the bag are taken into account in the one-gluon exchange approximation. We analyze catastrophic changes of the parameters of the near-critical configuration of compact star and compute the amount of the energy released by a corequake for the two extreme cases of the deconfinement phase transition scenarios. The first one corresponds to the ordinary first-order phase transition (Maxwell scenario) and the second one corresponds to the phase transition calculated using the bulk Gibbs equilibrium conditions and global charge neutrality (Glendenning scenario).
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/496/1/012001