Chiral symmetry breaking, color superconductivity and quark matter phase diagram: a variational approach

DOI10.1016/S0375-9474(00)00355-9zbMATH Open0971.81582arXivhep-ph/0003019MaRDI QIDQ1588883

R. Smith

Publication date: 5 December 2000

Published in: Nuclear Physics. A (Search for Journal in Brave)

Abstract: We discuss in this note simultaneous existence of chiral symmetry breaking and color superconductivity at finite temperature and density in a Nambu-Jona-Lasinio type model. The methodology involves an explicit construction of a variational ground state and minimisation of the thermodynamic potential. There exists solutions to the gap equations at finite densities with both quark antiquark as well as diquark condensates for the "ground" state. However, such a phase is thermodynamically unstable with the pressure being negative in this region. We also compute the equation of state, and obtain the structure of the phase diagram in the model.

Full work available at URL: https://arxiv.org/abs/hep-ph/0003019

zbMATH Keywords

equation of stateNambu-Jona-Lasinio type modelthermodynamic potential minimization

Mathematics Subject Classification ID

Nuclear physics (81V35) Strong interaction, including quantum chromodynamics (81V05)

Related Items (2)

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