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dc.contributor.authorAmetller Congost, Lluís
dc.contributor.authorTalavera Sánchez, Pedro
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear
dc.date.accessioned2014-05-21T12:02:41Z
dc.date.available2014-05-21T12:02:41Z
dc.date.created2014-05-12
dc.date.issued2014-05-12
dc.identifier.citationAmetller, L.; Talavera, P. Lowest resonance in QCD from low-energy data. "Physical review. D, Particles, fields, gravitation, and cosmology", 12 Maig 2014, vol. 9, núm. 89, p. 096004-1-096004-8.
dc.identifier.issn1550-7998
dc.identifier.urihttp://hdl.handle.net/2117/23029
dc.description.abstractWe worked out a generalization of su(2) chiral perturbation theory, including a perturbative singlet scalar field. The approach suggests that the prediction for sensible low-energy observables converge faster towards their physical value. The physical mass and width of the scalar particle are obtained through a simultaneous analysis of the pion vector form factor and the ¿¿¿p 0 p 0 cross section. Both values are statistically consistent with the ones obtained by using Roy equations in p-p scattering. In addition we find indications that the photon-photon-singlet coupling is quite small.
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Física
dc.subject.lcshParticles (Nuclear physics)--Chirality
dc.subject.otherQCD low-energy scalar resonance
dc.titleLowest resonance in QCD from low-energy data
dc.typeArticle
dc.subject.lemacQuiralitat
dc.contributor.groupUniversitat Politècnica de Catalunya. SC-SIMBIO - Sistemes complexos. Simulació discreta de materials i de sistemes biològics
dc.contributor.groupUniversitat Politècnica de Catalunya. GAA - Grup d'Astronomia i Astrofísica
dc.identifier.doi10.1103/PhysRevD.89.096004
dc.relation.publisherversionhttp://link.aps.org/doi/10.1103/PhysRevD.89.096004
dc.rights.accessOpen Access
local.identifier.drac14886592
dc.description.versionPostprint (published version)
local.citation.authorAmetller, L.; Talavera, P.
local.citation.publicationNamePhysical review. D, Particles, fields, gravitation, and cosmology
local.citation.volume9
local.citation.number89
local.citation.startingPage096004-1
local.citation.endingPage096004-8


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