6533b838fe1ef96bd12a468d
RESEARCH PRODUCT
Leading SU(3)-breaking corrections to the baryon magnetic moments in Chiral Perturbation Theory
J. Martin CamalichM. J. Vicente VacasLi-sheng GengL. Alvarez-rusosubject
PhysicsParticle physicsChiral perturbation theoryMagnetic momentHigh Energy Physics::PhenomenologyHyperonFOS: Physical sciencesGeneral Physics and AstronomyOrder (ring theory)FísicaRenormalizationBaryonHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)Quantum electrodynamicsCovariant transformationPerturbation theory (quantum mechanics)Symmetry breakingMathematical physicsdescription
We calculate the baryon magnetic moments using covariant Chiral Perturbation Theory ($\chi$PT) within the Extended-on-mass-shell (EOMS) renormalization scheme. By fitting the two available low-energy constants (LECs), we improve the Coleman-Glashow description of the data when we include the leading SU(3) breaking effects coming from the lowest-order loops. This success is in dramatic contrast with previous attempts at the same order using Heavy Baryon (HB) $\chi$PT and covariant Infrared (IR) $\chi$PT. We also analyze the source of this improvement with particular attention on the comparison between the covariant results.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2008-05-09 |