Hyperon resonances in the chiral bag model

Journal Article · Thu Jun 01 04:00:00 EDT 1989 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.39.3391· OSTI ID:6196508

Umino, Y; Myhrer, F

We calculate the masses of low-lying negative-parity ..lambda../sup */ and ..sigma../sup */ in a chiral bag model with broken SU(2)/direct product/SU(2) realization of chiral symmetry. All relevant one-gluon-exchange and effective quark-quark one-pion-exchange diagrams are evaluated. We show why the spin-flavor contents of the hyperon resonances are different from that of a nonrelativistic quark model. In particular, we find that the ..lambda..(1405) has almost no flavor-singlet component. The prescription used to project out the translational mode of the bag is tested for the simplest case.

• Research Organization: Department of Physics, State University of New York at Stony Brook, Stony Brook, New York 11794(US); Center for Theoretical Physics, Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 mbia, South Carolina 29208
• OSTI ID: 6196508
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 39:11; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645204* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR MOMENTUM
BAG MODEL
BARYONS
BOSON-EXCHANGE MODELS
CHIRAL SYMMETRY
COMPOSITE MODELS
EIGENVALUES
ELEMENTARY PARTICLES
EXTENDED PARTICLE MODEL
FERMIONS
FIELD THEORIES
FLAVOR MODEL
HADRONS
HYPERONS
LAMBDA BARYONS
LAMBDA-1405 BARYONS
LIE GROUPS
MASS FORMULAE
MATHEMATICAL MODELS
OBE MODEL
PARITY
PARTICLE MODELS
PARTICLE PROPERTIES
PERIPHERAL MODELS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
SIGMA BARYONS
SPIN
STRANGE PARTICLES
SU GROUPS
SU-2 GROUPS
SYMMETRY
SYMMETRY BREAKING
SYMMETRY GROUPS