Decuplet baryon magnetic moments in a QCD-based quark model beyond quenched approximation

Abstract

We study the decuplet baryon magnetic moments in a QCD-based quark model beyond quenched approximation. Our approach for unquenching the theory is based on the heavy baryon perturbation theory in which the axial couplings for baryon - meson and the meson-meson-photon couplings from the chiral perturbation theory are used together with the QM moment couplings. It also involves the introduction of a form factor characterizing the structure of baryons considered as composite particles. Using the parameters obtained from fitting the octet baryon magnetic moments, we predict the decuplet baryon magnetic moments. The ${\Omega }^{-}$ magnetic moment is found to be in good agreement with experiment: ${\mu }_{{\Omega }^{-}}$ is predicted to be $-1.97{\mu }_N$ compared to the experimental result of ($-$2.02 $\pm$ 0.05) ${\mu }_N$.

19 pages, 2 figures

References in corpus (2)

• Baryon magnetic moments in chiral perturbation theory
• Chiral perturbation theory analysis of the baryon magnetic moments revisited

Cited by in corpus (12)

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• Electromagnetic form factors of the ${\Omega }^{-}$ baryon in the spacelike and timelike regions
• Strange form factors of nucleon with nonlocal chiral effective Lagrangian
• Transition magnetic moments of $J^P={\frac{3}{2}}^{+}$ decuplet to $J^P={\frac{1}{2}}^{+}$ octet baryons in the chiral constituent quark model
• Effective field theory and the quark model, II. Structure of loop corrections
• Magnetic moments of JP = 3/2+ decuplet baryons using statistical model
• Baryon masses in a loop expansion with form factor
• Baryon quadrupole moment in the 1/N(c) expansion of QCD