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RESEARCH PRODUCT
Leading-order decuplet contributions to the baryon magnetic moments in chiral perturbation theory
Li-sheng GengJ. Martin CamalichM. J. Vicente Vacassubject
PhysicsNuclear and High Energy PhysicsParticle physicsChiral perturbation theoryNuclear TheoryMagnetic momentHigh Energy Physics::LatticeHigh Energy Physics - Lattice (hep-lat)Nuclear TheoryHigh Energy Physics::PhenomenologyDegrees of freedom (physics and chemistry)HyperonFOS: Physical sciencesCovarianceNuclear Theory (nucl-th)BaryonHigh Energy Physics - PhenomenologyHigh Energy Physics - LatticeHigh Energy Physics - Phenomenology (hep-ph)Covariant transformationPerturbation theory (quantum mechanics)Nuclear Experimentdescription
We extend an earlier study of the baryon magnetic moments in chiral perturbation theory by the explicit inclusion of the spin-3/2 decuplet resonances. We find that the corrections induced by these heavier degrees of freedom are relatively small in a covariant framework where unphysical spin-1/2 modes are removed. Consequently, implementing the leading SU(3)-breaking corrections given by both the baryon and decuplet contributions, we obtain a description of the baryon-octet magnetic moments that is better than the Coleman-Glashow relations. Finally, we discuss the uncertainties and compare between heavy baryon and covariant approaches. (C) 2009 Elsevier B.V. All rights reserved.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-06-01 | Physics Letters B |