Delta isobar masses, large N-c relations, and the quark model

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dc.contributorVirginia Techen
dc.contributor.authorCapstick, S.en
dc.contributor.authorWorkman, Ronald L.en
dc.contributor.departmentPhysicsen
dc.date.accessed2013-12-16en
dc.date.accessioned2013-12-18T19:46:38Zen
dc.date.available2013-12-18T19:46:38Zen
dc.date.issued1999-01-01en
dc.description.abstractMotivated by recent remarks on the Delta(+) mass and comparisons between the quark model and relations based on large-iri, with perturbative flavor breaking, two sets of Delta masses consistent with these constraints are constructed. These two sets, based either on an experimentally determined mass splitting or a quark model of isospin symmetry breaking, are shown to be inconsistent. The model dependence of this inconsistency is examined, and suggestions for improved experiments are made. An explicit quark model calculation and mass relations based on the large-N-c limit with perturbative flavor breaking are compared. The expected level of accuracy of such relations is realized in the quark model, except for mass relations derived by combining others which correspond to different SU(6) representations. It is shown that the Delta(0) and Delta(++) pole masses and Delta(0) - Delta(+) = (Delta(-) - Delta(++))/3 similar or equal to 1.5 MeV are more consistent with model expectations than the analogous Breit-Wigner masses and their splittings. [S0556-2821(99)02301-2].en
dc.format.mimetypeapplication/pdfen
dc.identifier.citationCapstick, S ; Workman, R, JAN 1 1999. “Delta isobar masses, large N-c relations, and the quark model,” PHYSICAL REVIEW D 59(1): 014032. DOI: 10.1103/PhysRevD.59.014032en
dc.identifier.doihttps://doi.org/10.1103/PhysRevD.59.014032en
dc.identifier.issn0556-2821en
dc.identifier.urihttp://hdl.handle.net/10919/24737en
dc.identifier.urlhttp://link.aps.org/doi/10.1103/PhysRevD.59.014032en
dc.language.isoenen
dc.publisherAmerican Physical Societyen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectisospin breakingen
dc.subject1/n-c expansionen
dc.subjectbaryonsen
dc.subjectscatteringen
dc.subjectdecupleten
dc.subjectAstronomy & Astrophysicsen
dc.subjectPhysicsen
dc.titleDelta isobar masses, large N-c relations, and the quark modelen
dc.title.serialPhysical Review Den
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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