High statistics measurement of Ke4 decay properties

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dc.creatorPislak, S.
dc.creatorAppel, R.
dc.creatorAtoyan, G. S.
dc.creatorBassalleck, B.
dc.creatorBergman, D. R.
dc.creatorCheung, N.
dc.creatorDhawan, S.
dc.creatorDo, H.
dc.creatorEgger, J.
dc.creatorEilerts, S.
dc.creatorFischer, H.
dc.creatorHerold, W.
dc.creatorIssakov, V. V.
dc.creatorKaspar, H.
dc.creatorKraus, D. E.
dc.creatorLazarus, D. M.
dc.creatorLichard, P.
dc.creatorLowe, J.
dc.creatorLozano, J.
dc.creatorMa, H.
dc.creatorMajid, W.
dc.creatorPoblaguev, A. A.
dc.creatorRehak, P.
dc.creatorSher, A.
dc.creatorSher, Aleksey
dc.creatorThompson, J. A.
dc.creatorTruöl, P.
dc.creatorZeller, M. E.
dc.date2003-01-31
dc.date.accessioned2026-07-07T10:32:14Z
dc.date.available2026-07-07T10:32:14Z
dc.descriptionWe report experimental details and results of a new measurement of the decay K+ -> pi+pi-e+nue (Ke4}. A sample of more than 400,000 Ke4 events with low background has been collected by Experiment 865 at the Brookhaven Alternate Gradient Synchrotron. From these data, the branching ratio (4.11+-0.01+-0.11)*10**(-5) and the pi-pi invariant mass dependence of the form factors F, G, and H of the weak hadronic current as well as the phase shift difference delta00-delta11 for pi-pi-scattering were extracted. Using constraints based on analyticity and chiral symmetry, a new value with considerably improved accuracy for the s-wave pi-pi-scattering length a00 has been obtained also: a00=0.216+-0.013 (stat.)+-0.002(syst.)+-0.002(theor.).
dc.description15 pages, 10 figures, submitted to Phys. Rev. D
dc.identifierhttps://arxiv.org/abs/hep-ex/0301040
dc.identifierhttp://arxiv.org/abs/hep-ex/0301040
dc.identifierPhys.Rev.D67:072004,2003
dc.identifierdoi:10.1103/PhysRevD.67.072004
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/178687
dc.subjectHigh Energy Physics - Experiment
dc.titleHigh statistics measurement of Ke4 decay properties
dc.typetext

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