Nambu--Jona-Lasinio model and charge independence

Journal Article · Mon May 29 04:00:00 EDT 1989 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.62.2586· OSTI ID:6391477

Henley, E M; Krein, G

For different up and down current quark masses, charge independence follows in the Nambu--Jona-Lasinio model from chiral-symmetry breaking; however, chiral symmetry is restored at high densities. The dependence of the constituent quark masses and the neutron-proton mass difference on the density are examined. The effect of the up-down-quark mass difference on the neutron-proton mass difference is large and in the right direction to explain the Nolen-Schiffer anomaly.

• Research Organization: Institute for Nuclear Theory, Department of Physics, FM-15, University of Washington, Seattle, Washington 98195(US)
• OSTI ID: 6391477
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 62:22; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

645300* -- High Energy Physics-- Particle Invariance Principles & Symmetries
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
CHARGE INDEPENDENCE
CHIRAL SYMMETRY
COMPOSITE MODELS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
FLAVOR MODEL
HADRONS
INVARIANCE PRINCIPLES
MASS
MASS DIFFERENCE
MATHEMATICAL MODELS
NUCLEI
NUCLEONS
PARTICLE MODELS
PARTICLE PROPERTIES
POSTULATED PARTICLES
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
QUARKS
SYMMETRY
SYMMETRY BREAKING