Phase Diagram at Finite Chemical Potentials in the Nambu-Jona-Lasinio Model

Journal Article · Tue May 24 00:00:00 EDT 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3587600· OSTI ID:21516863

Chengfu, Mu ^[1]; Lianyi, He ^[2]; Yuxin, Liu ^[3]

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1. Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871 (China)
2. Frankfurt Institute for Advanced Studies and Institute for Theoretical Physics, J.W. Goethe University, 60438 Frankfurt am Main (Germany)
3. Center for High Energy Physics, Peking University, Beijing 100871 (China)

We study the phase diagram of two flavor dense QCD at finite isospin and baryon chemical potentials in the framework of Nambu-Jona-Lasinio model. The system undergoes a crossover from a Bose-Einstein condensate of charged pions to a BCS superfluid with condensed quark-antiquark Cooper pairs when {mu}{sub I} increases at {mu}{sub B} = 0, and a nonzero baryon chemical potential serves as a mismatch between the pairing species. We observe a gapless pion condensation phase near the quadruple point ({mu}{sub I},{mu}{sub B}) = (m{sub {pi}},M{sub N}-1.5m{sub {pi}}) where m{sub {pi}}, M{sub N} are the vacuum masses of pions and nucleons, respectively. At very large isospin chemical potential, {mu}{sub I}>6.36m{sub {pi}}, an inhomogeneous LOFF superfluid phase appears in a window of {mu}{sub B}. Between the gapless and the LOFF phases, the pion superfluid phase and the normal quark matter phase are connected by a first order phase transition.

• OSTI ID: 21516863
• Journal Information: AIP Conference Proceedings, Vol. 1354, Issue 1; Conference: Tropical QCD II workshop, Cairns (Australia), 26 Sep - 1 Oct 2010; Other Information: DOI: 10.1063/1.3587600; (c) 2011 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BCS THEORY
BOSE-EINSTEIN CONDENSATION
COOPER PAIRS
FLAVOR MODEL
ISOSPIN
MASS
NUCLEONS
PHASE DIAGRAMS
PHASE TRANSFORMATIONS
PION CONDENSATION
PIONS
QUANTUM CHROMODYNAMICS
QUARK MATTER
QUARK-ANTIQUARK INTERACTIONS
QUARKS
SIMULATION
SUPERFLUIDITY
BARYONS
BOSONS
COMPOSITE MODELS
DIAGRAMS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
HADRONS
INFORMATION
INTERACTIONS
MATHEMATICAL MODELS
MATTER
MESONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PROPERTIES
PSEUDOSCALAR MESONS
QUANTUM FIELD THEORY
QUARK MODEL