Ginzburg-Landau phase diagram for dense matter with axial anomaly, strange quark mass, and meson condensation

Journal Article · Tue Feb 15 00:00:00 EST 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.045008· OSTI ID:21505014

Schmitt, Andreas; Stetina, Stephan ^[1]; Tachibana, Motoi ^[2]

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1. Institut fuer Theoretische Physik, Technische Universitaet Wien, 1040 Vienna (Austria)
2. Department of Physics, Saga University, Saga 840-8502 (Japan)

We discuss the phase structure of dense matter, in particular, the nature of the transition between hadronic and quark matter. Calculations within a Ginzburg-Landau approach show that the axial anomaly can induce a critical point in this transition region. This is possible because in three-flavor quark matter with instanton effects a chiral condensate can be added to the color-flavor locked phase without changing the symmetries of the ground state. In (massless) two-flavor quark matter such a critical point is not possible since the corresponding color superconductor (2SC) does not break chiral symmetry. We study the effects of a nonzero but finite strange quark mass which interpolates between these two cases. Since at ultrahigh density the first reaction of the color-flavor locked phase to a nonzero strange quark mass is to develop a kaon condensate, we extend previous Ginzburg-Landau studies by including such a condensate. We discuss the fate of the critical point systematically and show that the continuity between hadronic and quark matter can be disrupted by the onset of a kaon condensate. Moreover, we identify the mass terms in the Ginzburg-Landau potential which are needed for the 2SC phase to occur in the phase diagram.

• OSTI ID: 21505014
• Journal Information: Physical Review. D, Particles Fields, Vol. 83, Issue 4; Other Information: DOI: 10.1103/PhysRevD.83.045008; (c) 2011 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHIRAL SYMMETRY
CHIRALITY
COMPUTERIZED SIMULATION
DENSITY
GINZBURG-LANDAU THEORY
HADRONS
KAONS
MASS
PHASE DIAGRAMS
QUARK MATTER
S QUARKS
BOSONS
DIAGRAMS
ELEMENTARY PARTICLES
FERMIONS
INFORMATION
MATTER
MESONS
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
PSEUDOSCALAR MESONS
QUARKS
SIMULATION
STRANGE MESONS
STRANGE PARTICLES
SYMMETRY