Baryon magnetic moments and axial coupling constants with relativistic and exchange current effects

Journal Article · Tue May 20 04:00:00 EDT 1997 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.54273· OSTI ID:21175466

Helminen, C; Dannbom, K; Riska, D O ^[1]; Glozman, L Ya ^[2]

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1. Department of Physics, P.O. Box 9, 00014 University of Helsinki (Finland)
2. Institute for Theoretical Physics, University of Graz, 8010 Graz (Austria)

The predictions for the axial coupling constants of the baryons are improved by the large relativistic corrections to the constituent quark current operators, while the predictions for the magnetic moments are worsened. The relativistic corrections to the baryon magnetic moments can be compensated for by the exchange current corrections that are associated with spin and flavor dependent quark-quark interactions with a form suggested by pseudoscalar meson exchange. This is shown by a calculation of the magnetic moments of the light and strange baryons within a phenomenological spin and flavor dependent interquark interaction model, which in combination with a linear confining interaction yields a spectrum that is close to the empirical one. We also consider the possibility that a part of the spin and flavor dependent interaction could be due to axial vector and vector exchange.

• OSTI ID: 21175466
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 412; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AXIAL-VECTOR CURRENTS
CORRECTIONS
COUPLING CONSTANTS
FLAVOR MODEL
HYPERONS
MAGNETIC MOMENTS
PSEUDOSCALAR MESONS
QUARK-QUARK INTERACTIONS
QUARKS
RELATIVISTIC RANGE
SPIN
VECTOR CURRENTS