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arxiv: hep-ex/0309019 · v1 · submitted 2003-09-04 · ✦ hep-ex

High statistics study of the K- -> pi0 e- nu decay

I.V. Ajinenko , S.A. Akimenko , K.S. Belous , G.I. Britvich , I.G. Britvich , K.V. Datsko , A.P. Filin , A.V. Inyakin
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A.S. Konstantinov V.F. Konstantinov I.Y. Korolkov V.A. Khmelnikov V.M. Leontiev V.P. Novikov V.F. Obraztsov V.A. Polyakov V.I. Romanovsky V.M. Ronjin V.I. Shelikhov N.E. Smirnov A.A. Sokolov O.G. Tchikilev V.A. Uvarov O.P. Yushchenko (Institute for High Energy Physics Protvino Russia) V.N. Bolotov S.V. Laptev A.R. Pastsjak A.Yu. Polyarush R.Kh. Sirodeev (Institute for Nuclear Research Moscow
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keywords beenstatsystdecaylambdaanalysisbeamcouplings
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The decay K- -> pi0 e- nu has been studied using in-flight decays detected with the "ISTRA+" spectrometer working at the 25 GeV negative secondary beam of the U-70 PS. About 550K events were used for the analysis. The lambda+ parameter of the vector form-factor has been measured: lambda+ = 0.0286 +- 0.0008 (stat) +- 0.0006(syst). The limits on the possible tensor and scalar couplings have been obtained: f(T)/f+(0)=0.021 +0.064 -0.075 (stat) +- 0.026(syst) ; f(S)/f+(0)=0.002 +0.020 -0.022 (stat) +- 0.003(syst)

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