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Nature of light scalar mesons from their large N_c behavior

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dc.contributor.authorPeláez Sagredo, José Ramón
dc.date.accessioned2023-06-20T11:07:20Z
dc.date.available2023-06-20T11:07:20Z
dc.date.issued2004-03-12
dc.description©2004 The American Physical Society. his work was supported in part by funds provided by the Spanish DGI with Grant Nos. BFM2002-03218, BFM2000-1326 and BFM2002-01003; CICYT Grant No. FPA2000-0956; Junta de Andalucía Grant No. FQM-225 and EURIDICE with contract number HPRN-CT-2002-00311.
dc.description.abstractWe show how to obtain information about the states of an effective field theory in terms of the underlying fundamental theory. In particular, we analyze the spectroscopic nature of meson resonances from the meson-meson scattering amplitudes of the QCD low energy effective theory, combined with the expansion in the large number of colors. The vectors follow a q̅q behavior, whereas the, σ,ĸ, and f_0 (980) scalars disappear fo large N_c, in support of a q̅ q̅ qq -like nature. The a_0 shows a similar pattern, but the uncertainties are large enough to accommodate both interpretations.
dc.description.departmentDepto. de Física Teórica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipSpanish DGI
dc.description.sponsorshipCICYT, Spain
dc.description.sponsorshipJunta de Andalucía
dc.description.sponsorshipEU EURIDICE network
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/35516
dc.identifier.doi10.1103/PhysRevLett.92.102001
dc.identifier.issn0031-9007
dc.identifier.officialurlhttp://dx.doi.org/10.1103/PhysRevLett.92.102001
dc.identifier.relatedurlhttp://journals.aps.org
dc.identifier.urihttps://hdl.handle.net/20.500.14352/51735
dc.issue.number10
dc.journal.titlePhysical review letters
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.projectIDBFM2002-03218
dc.relation.projectIDBFM2000-1326
dc.relation.projectIDBFM2002-01003
dc.relation.projectIDFPA2000-0956
dc.relation.projectIDFQM-225
dc.relation.projectIDHPRN-CT-2002-00311
dc.rights.accessRightsopen access
dc.subject.cdu51-73
dc.subject.keywordChiral perturbation-theory
dc.subject.keywordScattering phase-Shift
dc.subject.keywordMulti-quark hadrons
dc.subject.keywordπ-π-Scattering
dc.subject.keywordOne-loop
dc.subject.keywordSigma
dc.subject.keywordUnitarization
dc.subject.keywordLagrangians
dc.subject.keywordResonance
dc.subject.keywordAmplitudeUnitarization
dc.subject.keywordAmplitude
dc.subject.ucmFísica-Modelos matemáticos
dc.subject.ucmFísica matemática
dc.titleNature of light scalar mesons from their large N_c behavior
dc.typejournal article
dc.volume.number92
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relation.isAuthorOfPublication.latestForDiscovery70900239-cb8b-49f3-931f-9dc6a8b7d8d5

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