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Two new sum rules for octet-baryon magnetic moments (μ) and constraints on QCD sum rules from new experimental determination of μ-s for the decuplet
, A. Iqubal, M. Dey, J. Dey
Published in Elsevier
Volume: 562
Issue: 1-2
Pages: 63 - 67
Recently the μΔ++ was found from a fit to π+p scattering [G.L. Castro, A. Mariano, Phys. Lett. B 517 (2002) 339] 3391. This enable us to pinpoint condensate parameters more precisely in the context of QCD sum rules (QCDSR). In the octet sector, the Coleman-Glashow sum rule (CGSR) [S. Coleman, S.L. Glashow, Phys. Rev. Lett. 6 (1961) 423] is violated by the experimental μ-s. QCDSR allows us to write down two sum rules similar to the CGSR, which are obeyed by the experimental magnetic moments, whereas they rule out a specific model using the Wilson loop approach and a particular chiral quark model. It is amusing to note that the QCDSR allows us to write down the quark and gluon condensates in terms of measurables like the μ-s of the nucleons and the Σ±. © 2003 Published by Elsevier Science B.V.
About the journal
JournalData powered by TypesetPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
PublisherData powered by TypesetElsevier