Chiral Quark Model of Nucleon Spin-Flavor Structure with SU(3) and Axial-U(1) Breakings

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dc.creatorCheng, T. P.
dc.creatorLi, Ling-Fong
dc.date1997-01-08
dc.date.accessioned2026-07-07T11:35:20Z
dc.date.available2026-07-07T11:35:20Z
dc.descriptionThe chiral quark model with a nonet of Goldstone bosons can yield an adequate description of the observed proton flavor and spin structure. In a previous publication we have compared the results of a SU(3) symmetric calculation with the phenomenological findings based on experimental measurements and SU(3) symmetry relations. In this paper we discuss their SU(3) and axial-U(1) breaking corrections. With two parameters, we obtain a very satisfactory fit to the F/D ratios for the octet baryon masses and for their axial vector couplings, as well as the different quark flavor contributions to the proton spin. The result also can account for, not only the light u and d quark asymmetry, but also the strange quark content, of the proton sea. SU(3) breaking is the key in reconciling the strange quark fraction as measured in the neutrino charm production and that as deduced from the pion nuleon sigma term.
dc.description16 pages, Latex (uses Revtex), to be submitted to Phys. Rev. D
dc.identifierhttps://arxiv.org/abs/hep-ph/9701248
dc.identifierhttp://arxiv.org/abs/hep-ph/9701248
dc.identifierPhys.Rev.D57:344-349,1998
dc.identifierdoi:10.1103/PhysRevD.57.344
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/198556
dc.subjectHigh Energy Physics - Phenomenology
dc.titleChiral Quark Model of Nucleon Spin-Flavor Structure with SU(3) and Axial-U(1) Breakings
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