Precise Measurement of the Pi+ -> Pi0 e+ nu Branching Ratio

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dc.creatorPocanic, D.
dc.creatorFrlez, E.
dc.creatorBaranov, V. A.
dc.creatorBertl, W.
dc.creatorBroennimann, C.
dc.creatorBychkov, M.
dc.creatorCrawford, J. F.
dc.creatorDaum, M.
dc.creatorKhomutov, N. V.
dc.creatorKorenchenko, A. S.
dc.creatorKorenchenko, S. M.
dc.creatorKozlowski, T.
dc.creatorKravchuk, N. P.
dc.creatorKuchinsky, N. A.
dc.creatorLi, W.
dc.creatorMinehart, R. C.
dc.creatorMzhavia, D.
dc.creatorRitchie, B. G.
dc.creatorRitt, S.
dc.creatorRozhdestvensky, A. M.
dc.creatorSidorkin, V. V.
dc.creatorSmith, L. C.
dc.creatorSupek, I.
dc.creatorTsamalaidze, Z.
dc.creatorVanDevender, B. A.
dc.creatorWang, Y.
dc.creatorWirtz, H. -P.
dc.creatorZiock, K. O. H.
dc.date2003-12-09
dc.date2004-07-17
dc.date.accessioned2026-07-07T10:28:22Z
dc.date.available2026-07-07T10:28:22Z
dc.descriptionUsing a large acceptance calorimeter and a stopped pion beam we have made a precise measurement of the rare Pi+ -> Pi0 e+ Nu,(pi_beta) decay branching ratio. We have evaluated the branching ratio by normalizing the number of observed pi_beta decays to the number of observed Pi+ -> e+ Nu, (pi_{e2}) decays. We find the value of Gamma(Pi+ -> Pi0 e+ Nu)/Gamma(total) = [1.036 +/- 0.004(stat.) +/- 0.004(syst.) +/- 0.003(pi_{e2})] x 10^{-8}$, where the first uncertainty is statistical, the second systematic, and the third is the pi_{e2} branching ratio uncertainty. Our result agrees well with the Standard Model prediction.
dc.description4 pages, 5 figures, 1 table, revtex4; changed content; updated analysis
dc.identifierhttps://arxiv.org/abs/hep-ex/0312030
dc.identifierhttp://arxiv.org/abs/hep-ex/0312030
dc.identifierPhys.Rev.Lett.93:181803,2004
dc.identifierdoi:10.1103/PhysRevLett.93.181803
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/177424
dc.subjectHigh Energy Physics - Experiment
dc.titlePrecise Measurement of the Pi+ -> Pi0 e+ nu Branching Ratio
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