Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/131599
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dc.contributor.authorGarra Ticó, Jordi-
dc.contributor.authorGraugés Pous, Eugeni-
dc.contributor.authorBABAR Collaboration-
dc.date.accessioned2019-04-05T11:11:35Z-
dc.date.available2019-04-05T11:11:35Z-
dc.date.issued2009-12-02-
dc.identifier.issn1550-7998-
dc.identifier.urihttp://hdl.handle.net/2445/131599-
dc.description.abstractWe perform a time-dependent amplitude analysis of B 0 → K 0 S π + π − decays to extract the C P violation parameters of f 0 ( 980 ) K 0 S and ρ 0 ( 770 ) K 0 S and the direct C P asymmetry of K * + ( 892 ) π − . The results are obtained from a data sample of ( 383 ± 3 ) × 10 6 B ¯¯¯ B decays, collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. We find two solutions, with an equivalent goodness-of-fit. Including systematic and Dalitz plot model uncertainties, the combined confidence interval for values of the C P parameter β eff in B 0 decays to f 0 ( 980 ) K 0 S is 18 ° < β eff < 76 ° at 95% confidence level (C.L). C P conservation in B 0 decays to f 0 ( 980 ) K 0 S is excluded at 3.5 standard deviations including systematic uncertainties. For B 0 decays to ρ 0 ( 770 ) K 0 S , the combined confidence interval is − 9 ° < β eff < 57 ° at 95% C.L. In decays to K * + ( 892 ) π − we measure the direct C P asymmetry to be A C P = − 0.20 ± 0.10 ± 0.01 ± 0.02 . The measured phase difference (including B 0 ¯¯¯ B 0 mixing) between decay amplitudes of B 0 → K * + ( 892 ) π − and ¯¯¯ B 0 → K * − ( 892 ) π + , excludes the interval − 137 ° < Δ Φ ( K * + ( 892 ) π − ) < − 5 ° at 95% C.L.-
dc.format.extent28 p.-
dc.format.mimetypeapplication/pdf-
dc.language.isoeng-
dc.publisherAmerican Physical Society-
dc.relation.isformatofReproducció del document publicat a: https://doi.org/10.1103/PhysRevD.80.112001-
dc.relation.ispartofPhysical Review D, 2009, vol. 80, num. 11, p. 112001-
dc.relation.urihttps://doi.org/10.1103/PhysRevD.80.112001-
dc.rights(c) American Physical Society, 2009-
dc.subject.classificationFísica de partícules-
dc.subject.classificationExperiments-
dc.subject.otherParticle physics-
dc.subject.otherExperiments-
dc.titleTime-dependent amplitude analysis of B0→K0Sπ+π−-
dc.typeinfo:eu-repo/semantics/article-
dc.typeinfo:eu-repo/semantics/publishedVersion-
dc.identifier.idgrec577727-
dc.date.updated2019-04-05T11:11:35Z-
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess-
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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