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arXiv · hep-ex/0309019

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·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·V. N. Bolotov·S. V. Laptev·A. R. Pastsjak·A. Yu. Polyarush·R. Kh. Sirodeev
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Abstract

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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I. V. Ajinenko, S. A. Akimenko, K. S. Belous, G. I. Britvich, I. G. Britvich, K. V. Datsko, A. P. Filin, A. V. Inyakin, 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, V. N. Bolotov, S. V. Laptev, A. R. Pastsjak, A. Yu. Polyarush, R. Kh. Sirodeev. 2003-09-04. High statistics study of the K- -> pi0 e- nu decay. https://doi.org/10.1016/j.physletb.2003.09.026

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