High statistic study of the K- -> pi0 mu- nu decay

Phys.Lett.B581:31-38,2004 The decay K- -> pi0 mu- nu has been studied using in-flight decays detected with the "ISTRA+" spectrometer. About 540K events were collected for the analysis. The lambda+ and lambda0 slope parameters of the decay form-factors f+(t), f0(t) have been measured : l...

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Hauptverfasser:	Yushchenko, O. P, 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, Tchikilev, O. G, Uvarov, V. A, Bolotov, V. N, Laptev, S. V, Pastsjak, A. R, Polyarush, A. Yu
Format:	Artikel
Sprache:	eng
Schlagworte:	Physics - High Energy Physics - Experiment
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Zusammenfassung:	Phys.Lett.B581:31-38,2004 The decay K- -> pi0 mu- nu has been studied using in-flight decays detected with the "ISTRA+" spectrometer. About 540K events were collected for the analysis. The lambda+ and lambda0 slope parameters of the decay form-factors f+(t), f0(t) have been measured : lambda+ = 0.0277+-0.0013 (stat)+-0.0009 (syst), lambda0 = 0.0183+-0.0011(stat)+-0.0006(syst), and d(lambda0)/d(lambda+)=-0.348. The limits on the possible tensor and scalar couplings have been derived: fT/f+(0)=-0.0007 +- 0.0071, fS/f+(0)=0.0017 +- 0.0014. No visible non-linearity in the form-factors have been observed.
DOI:	10.48550/arxiv.hep-ex/0312004