Please use this identifier to cite or link to this item: http://hdl.handle.net/2307/389
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dc.contributor.authorUTfit Collaboration-
dc.contributor.authorBona, M.-
dc.contributor.authorCiuchini, Marco-
dc.contributor.authorFranco, E.-
dc.contributor.authorLubicz, Vittorio-
dc.contributor.authorMartinelli, G.-
dc.contributor.authorParodi, F.-
dc.contributor.authorPierini, M.-
dc.contributor.authorRoudeau, P.-
dc.contributor.authorSchiavi, C.-
dc.contributor.authorSilvestrini, L.-
dc.contributor.authorSordini, V.-
dc.contributor.authorStocchi, A.-
dc.contributor.authorVagnoni, V.-
dc.date.accessioned2010-07-30T13:06:34Z-
dc.date.available2010-07-30T13:06:34Z-
dc.date.issued2007-07-
dc.identifier.urihttp://hdl.handle.net/2307/389-
dc.description.abstractMotivated by a recent paper that compares the results of the analysis of the CKM angle alpha in the frequentist and in the Bayesian approaches, we have reconsidered the information on the hadronic amplitudes, which helps in constraining the value of alpha in the standard model. We find that the Bayesian method gives consistent results irrespective of the parametrization of the hadronic amplitudes and that the results of the frequentist and Bayesian approaches are equivalent when comparing meaningful probability ranges or confidence levels. We also find that from B-->pipi decays alone the 95% probability region for alpha is the interval [80°, 170°], well consistent with recent analyses of the unitarity triangle where, by using all the available experimental and theoretical information, one gets alpha=(93±4)°. Last but not least, by using simple arguments on the hadronic matrix elements, we show that the unphysical region alpha~0, present in several experimental analyses, can be eliminated.en
dc.language.isoenen
dc.publisherAmerican Physical Societyen
dc.relation.ispartofPhysical Review Den
dc.subjectBayesian statisticsen
dc.subjectCP invarianceen
dc.titleImproved determination of the CKM Angle α from B --> π π decaysen
dc.typeArticleen
dc.subject.miurSettori Disciplinari MIUR::Scienze fisiche::FISICA TEORICA, MODELLI E METODI MATEMATICIen
dc.subject.miurScienze fisiche-
dc.subject.isicruiCategorie ISI-CRUI::Scienze fisiche::Physicsen
dc.subject.isicruiScienze fisiche-
dc.subject.anagraferoma3Scienze fisicheen
dc.relation.volumenumber76en
dc.relation.pagenumber014015-014015-10en
dc.identifier.urlhttp://link.aps.org/doi/10.1103/PhysRevD.76.014015-
dc.identifier.doi10.1103/PhysRevD.76.014015-
dc.description.romatrecurrentDipartimento di Fisica 'Edoardo Amaldi'*
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item.languageiso639-1other-
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