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Precise determination of the f(0)(600) and f(0)(980) pole parameters from a dispersive data analysis

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dc.contributor.authorGarcia-Martin, R
dc.contributor.authorKamiński, Robert
dc.contributor.authorPeláez Sagredo, José Ramón
dc.contributor.authorRuiz De Elvira Carrascal, Jacobo
dc.date.accessioned2023-06-20T04:02:03Z
dc.date.available2023-06-20T04:02:03Z
dc.date.issued2011-08-09
dc.description©2011 American Physical Society.
dc.description.abstractWe use our latest dispersive analysis of π π scattering data and the very recent K_(l4) experimental results to obtain the mass, width, and couplings of the two lightest scalar-isoscalar resonances. These parameters are defined from their associated poles in the complex plane. The analytic continuation to the complex plane is made in a model-independent way by means of once-and twice-subtracted dispersion relations for the partial waves, without any other theoretical assumption. We find the f(0)(600) pole at [457_(-13)^(+14)] – i[279_(-7)^(+11)+ MeV and that of the f(0)(980) at (996 ± 7) – i[25_(-6)^(+10)] MeV, whereas their respective couplings to two pions are 3.59_(-0.13)^(+0.11) and 2.3 ± 0.2 GeV.
dc.description.departmentDepto. de Física Teórica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/35004
dc.identifier.doi10.1103/PhysRevLett.107.072001
dc.identifier.issn0031-9007
dc.identifier.officialurlhttp://dx.doi.org/10.1103/PhysRevLett.107.072001
dc.identifier.relatedurlhttp://journals.aps.org
dc.identifier.urihttps://hdl.handle.net/20.500.14352/44830
dc.issue.number7
dc.journal.titlePhysical review letters
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.rights.accessRightsopen access
dc.subject.cdu51-73
dc.subject.keywordπ-π Scattering
dc.subject.keywordChiral perturbation-theory
dc.subject.keywordMeson dynamics
dc.subject.keywordFinal-states
dc.subject.keywordPhase-shift
dc.subject.keywordGamma-Ggmma
dc.subject.keywordSigma-Pple
dc.subject.keywordAmplitudes
dc.subject.keywordDecays
dc.subject.keywordModel
dc.subject.ucmFísica-Modelos matemáticos
dc.subject.ucmFísica matemática
dc.titlePrecise determination of the f(0)(600) and f(0)(980) pole parameters from a dispersive data analysis
dc.typejournal article
dc.volume.number107
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