Multiquark baryons and the MIT bag model

Journal Article · Wed Aug 01 00:00:00 EDT 1979 · Phys. Rev., D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.20.748· OSTI ID:6128024

Strottman, D

The calculation of masses of q/sup 4/q-bar and q/sup 5/q-bar/sup 2/ baryons is carried out within the framework of Jaffe's approximation to the MIT bag model. A general method for calculating the necessary SU(6) is contained in SU(3) x SU(2) coupling coefficients is outlined and tables of the coefficients necessary for q/sup 4/q-bar and q/sup 5/q-bar/sup 2/ calculations are given. An expression giving the decay amplitude of an arbitrary multiquark state to arbitrary two-body final states is given in terms of SU(3) Racah and 9-lambda..mu.. recoupling coefficients. The decay probabilities for low-lying 1/2/sup -/ q/sup 4/q-bar baryons are given and compared with experiment. All low-lying 1/2/sup -/ baryons are found to belong to the same SU(6) representation and all known 1/2/sup -/ resonances below 1900 MeV may be accounted for without the necessity of introducing P-wave states. The masses of many exotic states are predicted including a 1/2/sup -/ Z*/sub 0/ at 1650 MeV and 1/2/sup -/ hypercharge -2 and +3 states at 2.25 and 2.80 GeV, respectively. The agreement with experiment for the 3/2/sup -/ and 5/2/sup -/ baryons is less good. The lowest q/sup 5/q-bar/sup 2/ state is predicted to be a 1/2/sup +/ ..lambda..* at 1900 MeV.

• Research Organization: Theoretical Division, Los Alamos Scientific Laboratory, University of California, Los Alamos, New Mexico 87545
• OSTI ID: 6128024
• Journal Information: Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Vol. 20:3; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645201* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- General & Scattering Theory
645301 -- High Energy Physics-- Particle Invariance Principles & Symmetries-- General-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
ANGULAR MOMENTUM
BAG MODEL
BARYON RESONANCES
BARYONS
COMPOSITE MODELS
DECAY
DECAY AMPLITUDES
ELEMENTARY PARTICLES
ENERGY LEVELS
EXCITED STATES
EXOTIC RESONANCES
EXTENDED PARTICLE MODEL
FERMIONS
HADRONS
LIE GROUPS
MANY-BODY PROBLEM
MASS SPECTRA
MATHEMATICAL MODELS
MULTIPLICITY
PARITY
PARTICLE DECAY
PARTICLE MODELS
PARTICLE PROPERTIES
POSTULATED PARTICLES
QUARK MODEL
QUARKS
RACAH COEFFICIENTS
RESONANCE
RESONANCE PARTICLES
SPECTRA
SPIN
SU GROUPS
SU-2 GROUPS
SU-3 GROUPS
SU-6 GROUPS
SYMMETRY GROUPS
TRANSITION AMPLITUDES
TWO-BODY PROBLEM