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Nonordinary light meson couplings and the 1/N_c expansion

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dc.contributor.authorCohen, Thomas
dc.contributor.authorLlanes Estrada, Felipe José
dc.contributor.authorPeláez Sagredo, José Ramón
dc.contributor.authorRuiz De Elvira Carrascal, Jacobo
dc.date.accessioned2023-06-19T13:27:48Z
dc.date.available2023-06-19T13:27:48Z
dc.date.issued2014-08-14
dc.description© 2014 American Physical Society. This work was partially supported by the Spanish Research Contracts No. FIS2008-01323, No. FPA2011-27853-C02-01, and No. FPA2011-27853-C02-02 and the DFG (No. SFB/TR 16, “Subnuclear Structure of Matter”). We acknowledge the support of the European Community-Research Infrastructure Integrating Activity “Study of Strongly Interacting Matter” (HadronPhysics2), Grant Agreement No. 227431 under the Seventh Framework Programme of the EU.
dc.description.abstractWe study the large N_c behavior of couplings among light meson states with different compositions in terms of quarks and gluons. We shortly review the most common compositions of mesons, which are of interest for the understanding of low-lying meson resonances, namely, the ordinary quark-antiquark states as well as the nonordinary glueball, tetraquark, and other states. We dedicate special attention to Jaffe's generalization of the tetraquark with N_c - 1 q -q over bar q pairs, which is the only type of state we have identified whose width does not necessarily vanish with N_c, though it does decouple exponentially with N_c from the ππ channel, so that it is weakly coupled to the meson-meson system.
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipEuropean Community- Research Infrastructure Integrating Activity
dc.description.sponsorshipComisión Interministerial de Ciencia y Tecnología (CICYT)
dc.description.sponsorshipMinisterio de Economía y Competitividad (MEC)
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/28285
dc.identifier.doi10.1103/PhysRevD.90.036003
dc.identifier.issn1550-7998
dc.identifier.officialurlhttp://journals.aps.org/prd/abstract/10.1103/PhysRevD.90.036003
dc.identifier.relatedurlhttp://journals.aps.org/
dc.identifier.urihttps://hdl.handle.net/20.500.14352/33773
dc.issue.number3
dc.journal.titlePhysical Review D
dc.language.isoeng
dc.page.final1
dc.page.initial036003
dc.publisherAmerican Physical Society
dc.relation.projectIDHadronPhysics2 (227431)
dc.relation.projectIDFIS2008-01323
dc.relation.projectIDFPA2011- 27853-C02-01
dc.relation.projectIDFPA2011-27853-C02-02
dc.relation.projectIDSFB/TR 16
dc.rights.accessRightsopen access
dc.subject.cdu53
dc.subject.keywordChiral Perturbation-Theory
dc.subject.keywordLarge N_c
dc.subject.keywordExtraordinary Hadrons
dc.subject.keyword1-N Expansion
dc.subject.keywordResonances
dc.subject.keywordBaryons
dc.subject.keywordQuark
dc.subject.ucmFísica (Física)
dc.subject.unesco22 Física
dc.titleNonordinary light meson couplings and the 1/N_c expansion
dc.typejournal article
dc.volume.number90
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