Estimate of B(K -> pi nu nubar) from Standard Model fits to lambda_t

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dc.creatorKettell, S. H.
dc.creatorLandsberg, L. G.
dc.creatorNguyen, H.
dc.date2002-12-20
dc.date2003-05-19
dc.date.accessioned2026-07-07T10:33:13Z
dc.date.available2026-07-07T10:33:13Z
dc.descriptionWe estimate B(K -> pi nu nubar) in the context of the Standard Model by fitting for lambda_t = Vtd x V*ts of the `kaon unitarity triangle' relation. We fit data from epsilon_K, the CP-violating parameter describing K-mixing, and a_{psi K}, the CP-violating asymmetry in B -> J/psi K decays. Our estimate is independent of the CKM matrix element Vcb and of the ratio of Bs to Bd mixing frequencies. The measured value of B(K+ -> pi+ nu nubar) can be compared both to this estimate and to predictions made from the ratio of B mixing frequencies.
dc.description8 pages, including 6 figures. v3 includes an expanded discussion of correlations between SM inputs to the lambda_t fit, clarifies the discussion of the independence of this result from the ratio of B mixing frequencies, includes minor updates to the values of SM input parameters, and includes some new and some updated references
dc.identifierhttps://arxiv.org/abs/hep-ph/0212321
dc.identifierhttp://arxiv.org/abs/hep-ph/0212321
dc.identifierPhys.Atom.Nucl.67:1398-1407,2004; Yad.Fiz.67:1423-1432,2004
dc.identifierdoi:10.1134/1.1777296
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/179033
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Experiment
dc.titleEstimate of B(K -> pi nu nubar) from Standard Model fits to lambda_t
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