Octet magnetic moments and the Coleman-Glashow sum rule violation in the chiral quark model

Details Octet magnetic moments and the Coleman-Glashow sum rule violation in the chiral quark model Octet magnetic moments and the Coleman-Glashow sum rule violation in the chiral quark model

2002-08-14

arxiv.org/abs/hep-ph/0208134v1

Phys.Rev. D66 (2002) 051501

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 RevTeX pages, accepted for publication in PRD(Rapid Communication)

Scientific paper

10.1103/PhysRevD.66.051501

Baryon octet magnetic moments when calculated within the chiral quark model, incorporating the orbital angular momentum as well as the quark sea contribution through the Cheng-Li mechanism, not only show improvement over the non relativistic quark model results but also gives a non zero value for the right hand side of Coleman-Glashow sum rule. When effects due to spin-spin forces between constituent quarks as well as `mass adjustments' due to confinement are added, it leads to an excellent fit for the case of p, \Sigma^+, \Xi^o and violation of Coleman-Glashow sum rule, whereas in almost all the other cases the results are within 5% of the data.

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