Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-10-17
Nucl.Phys. A616 (1997) 555-574
Physics
High Energy Physics
High Energy Physics - Phenomenology
Confinement exchange current contribution included, results improved, coauthor list expanded
Scientific paper
10.1016/S0375-9474(97)81119-0
The large relativistic corrections to the constituent quark current operators improve the predictions for the axial couplings of the baryons, but worsen those for their magnetic moments. The exchange current corrections that are associated with flavor and spin dependent hyperfine interactions between the quarks with a form suggested by pseudoscalar meson exchange can compensate the relativistic corrections to the baryon magnetic moments. This is demonstrated by a calculation of the magnetic moments of the non-strange and strange baryons using wave functions and exchange current operators, which correspond to a recent phenomenological spin- and flavor dependent interquark interaction model with a linear confining interaction, which yields a spectrum close to the empirical one. The possibility that part of the flavor and spin dependent interaction could be due to vector and axial-vector exchange is explored.
Dannbom K.
Glozman Leonid Ya.
Helminen C.
Riska} D. O.
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