Effects of diquarks and mesons on baryon magnetic moments

Journal Article · Fri Sep 01 04:00:00 EDT 1989 · Physical Review (Section) D: Particles and Fields; (USA)

DOI:https://doi.org/10.1103/PhysRevD.40.1606· OSTI ID:5396707

Lichtenberg, D B ^[1]; Namgung, W ^[2]

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1. Department of Physics, Indiana University, Bloomington, Indiana 47405 (US)
2. Department of Physics, Dongguk University, Seoul 100, South Korea

We develop a formalism to describe baryon magnetic moments, including effects of diquark correlations and pseudoscalar-meson clouds in the baryon wave functions. The expressions for the magnetic moments involve overlap integrals of baryon spatial wave functions and the probability amplitudes for the existence of correlated quark-antiquark pairs (pseudoscalar mesons). Although the integrals and probability amplitudes can in principle be calculated from lattice QCD or from another specific model, in this paper we treat these quantities as adjustable parameters. Although in our model neither diquarks nor mesons by themselves improve the agreement with experiment, the combined changes lead to significantly better results.

• OSTI ID: 5396707
• Journal Information: Physical Review (Section) D: Particles and Fields; (USA), Journal Name: Physical Review (Section) D: Particles and Fields; (USA) Vol. 40:5; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

645202* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Electromagnetic Interactions & Properties
645400 -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR MOMENTUM
BARYONS
BOSONS
COMPOSITE MODELS
DIFFERENTIAL EQUATIONS
DIRAC EQUATION
ELEMENTARY PARTICLES
EQUATIONS
FERMIONS
FIELD THEORIES
FUNCTIONS
HADRONS
LATTICE FIELD THEORY
MAGNETIC MOMENTS
MATHEMATICAL MODELS
MESONS
PARTIAL DIFFERENTIAL EQUATIONS
PARTICLE MODELS
PARTICLE PROPERTIES
POSTULATED PARTICLES
PROBABILITY
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
QUARKS
SPIN
WAVE EQUATIONS
WAVE FUNCTIONS