Kaon condensation in CFL quark matter, the Goldstone theorem, and the 2PI Hartree approximation
- Department of Physics, Norwegian University of Science and Technology, Hoegskoleringen 5, N-7491 Trondheim (Norway)
At very high densities, QCD is in the color-flavor-locked phase, which is a color-superconducting phase. The diquark condensates break chiral symmetry in the same way as it is broken in vacuum QCD and gives rise to an octet of pseudo-Goldstone bosons and a superfluid mode. The lightest of these are the charged and neutral kaons. For energies below the superconducting gap, the kaons are described by an O(2)xO(2)-symmetric effective scalar field theory with chemical potentials. We use this effective theory to study Bose-condensation of kaons and their properties as functions of the temperature and the chemical potentials. We use the 2-particle irreducible effective action formalism in the Hartree approximation. The renormalization of the gap equations and the effective potential is studied in detail and we show that the counterterms are independent of temperature and chemical potentials. We determine the phase diagram and the medium-dependent quasiparticle masses. It is shown that the Goldstone theorem is satisfied to a very good approximation.
- OSTI ID:
- 21516953
- Journal Information:
- AIP Conference Proceedings, Vol. 1343, Issue 1; Conference: QCHS 9: 9. international conference on quark confinement and the hadron spectrum, Madrid (Spain), 30 Aug - 3 Sep 2010; Other Information: DOI: 10.1063/1.3575102; (c) 2011 American Institute of Physics; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CHIRAL SYMMETRY
COLOR MODEL
CONDENSATES
DENSITY
FIELD THEORIES
FLAVOR MODEL
GOLDSTONE BOSONS
HARTREE-FOCK METHOD
KAONS NEUTRAL
MASS
PARTICLES
PHASE DIAGRAMS
QUANTUM CHROMODYNAMICS
QUARK MATTER
RENORMALIZATION
SCALAR FIELDS
SUPERFLUIDITY
SYMMETRY BREAKING
APPROXIMATIONS
BOSONS
CALCULATION METHODS
COMPOSITE MODELS
DIAGRAMS
ELEMENTARY PARTICLES
HADRONS
INFORMATION
KAONS
MATHEMATICAL MODELS
MATTER
MESONS
PARTICLE MODELS
PHYSICAL PROPERTIES
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
QUANTUM FIELD THEORY
QUARK MODEL
STRANGE MESONS
STRANGE PARTICLES
SYMMETRY