Measurement of K^{-}_{e3} branching ratio

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dc.creatorRomanovsky, V. I.
dc.creatorAkimenko, S. A.
dc.creatorBritvich, G. I.
dc.creatorDatsko, K. V.
dc.creatorFilin, A. P.
dc.creatorInyakin, A. V.
dc.creatorKonstantinov, A. S.
dc.creatorKorolkov, I. Y.
dc.creatorKhmelnikov, V. A.
dc.creatorLeontiev, V. M.
dc.creatorNovikov, V. P.
dc.creatorObraztsov, V. F.
dc.creatorPolyakov, V. A.
dc.creatorShelikhov, V. I.
dc.creatorTchikilev, O. G.
dc.creatorUvarov, V. A.
dc.creatorYushchenko, O. P.
dc.creatorBolotov, V. N.
dc.creatorDuk, V. A.
dc.creatorLaptev, S. V.
dc.creatorPolyarush, A. Yu.
dc.date2007-04-16
dc.date2007-05-22
dc.date.accessioned2026-07-07T08:02:27Z
dc.date.available2026-07-07T08:02:27Z
dc.descriptionThe branching fraction for the decay $K^{-} \to π^{0} e \bar ν$ is measured using in-flight decays detected with {\bf ISTRA+} setup working at the 25 GeV negative secondary beam of the U-70 PS:\linebreak $Br_{K_{e3}}= (5.124 \pm 0.009 (stat) \pm 0.029(norm) \pm 0.030(syst))%$. From this value the $|V_{us}|$ element of the CKM matrix is extracted, using previously measured $f_{+}(t)$ form factor: $|V_{us}|=0.227 \pm 0.002$. The results are in agreement with recent measurements by BNL E865, FNAL KTeV, KLOE.
dc.description10 pages, 8 figures
dc.identifierhttps://arxiv.org/abs/0704.2052
dc.identifierhttp://arxiv.org/abs/0704.2052
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/129234
dc.subjectHigh Energy Physics - Experiment
dc.titleMeasurement of K^{-}_{e3} branching ratio
dc.typetext

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