Properties of the massive Gross-Neveu model with nonzero baryon and isospin chemical potentials

Journal Article · Tue Dec 15 00:00:00 EST 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.80.125013· OSTI ID:21316564

Ebert, D ^[1]; Klimenko, K G ^[2]

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1. Institute of Physics, Humboldt-University Berlin, 12489 Berlin (Germany)
2. IHEP and University of Dubna (Protvino branch), 142281 Protvino, Moscow Region (Russian Federation)

The properties of the two-flavored Gross-Neveu model with nonzero current quark mass are investigated in the (1+1)-dimensional space-time at finite isospin {mu}{sub I} as well as quark number {mu} chemical potentials and zero temperature. The consideration is performed in the limit N{sub c}{yields}{infinity}, i.e., in the case with an infinite number of colored quarks. In the plane of parameters {mu}{sub I}, {mu} a rather rich phase structure is found, which contains phases with and without pion condensation. We have found a great variety of one-quark excitations of these phases, including gapless and gapped quasiparticles. Moreover, the mesonic mass spectrum in each phase is also investigated.

• OSTI ID: 21316564
• Journal Information: Physical Review. D, Particles Fields, Vol. 80, Issue 12; Other Information: DOI: 10.1103/PhysRevD.80.125013; (c) 2009 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
BARYONS
COLOR MODEL
EXCITATION
ISOSPIN
LAGRANGIAN FIELD THEORY
MASS
MASS SPECTRA
PION CONDENSATION
PIONS
POTENTIALS
QUARKS
QUASI PARTICLES
SIMULATION
SPACE-TIME
TWO-DIMENSIONAL CALCULATIONS