Pion and kaon condensation at finite temperature and density

Journal Article · Thu Mar 15 00:00:00 EDT 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.75.065011· OSTI ID:21020190

Andersen, Jens O ^[1]

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1. Department of Physics, Norwegian University of Science and Technology, N-7491 Trondheim (Norway)

In this paper, we study O(2N)-symmetric {phi}{sup 4}-theory at finite temperature and density using the two-particle irreducible 1/N expansion. As specific examples, we consider pion condensation at finite isospin chemical potential and kaon condensation at finite chemical potential for hypercharge and isospin charge. We calculate the phase diagrams and the quasiparticle masses for pions and kaons in the large-N limit. It is shown that the effective potential and the gap equation can be renormalized by using local counterterms for the coupling constant and mass parameter, which are independent of temperature and chemical potentials.

• OSTI ID: 21020190
• Journal Information: Physical Review. D, Particles Fields, Vol. 75, Issue 6; Other Information: DOI: 10.1103/PhysRevD.75.065011; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COUPLING CONSTANTS
DENSITY
HYPERCHARGE
ISOSPIN
KAONS
PHASE DIAGRAMS
PHI4-FIELD THEORY
PION CONDENSATION
PIONS
POTENTIALS
REST MASS