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

• Main Authors: Ajinenko, I. V, Akimenko, S. A, Belous, K. S, Britvich, G. I, Britvich, I. G, Datsko, K. V, Filin, A. P, Inyakin, A. V, Konstantinov, A. S, Konstantinov, V. F, Korolkov, I. Y, Khmelnikov, V. A, Leontiev, V. M, Novikov, V. P, Obraztsov, V. F, Polyakov, V. A, Romanovsky, V. I, Ronjin, V. M, Shelikhov, V. I, Smirnov, N. E, Sokolov, A. A, Tchikilev, O. G, Uvarov, V. A, Yushchenko, O. P, Bolotov, V. N, Laptev, S. V, Pastsjak, A. R, Polyarush, A. Yu, Sirodeev, R. Kh
• Format: Journal Article
• Language: English
• Published: 04.09.2003
• Subjects: Physics - High Energy Physics - Experiment
• DOI: 10.48550/arxiv.hep-ex/0309019

Phys.Lett.B574:14-20,2003 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)