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

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

2003-09-04

arxiv.org/abs/hep-ex/0309019v1

Phys.Lett.B574:14-20,2003

Physics

High Energy Physics

High Energy Physics - Experiment

LaTeX-2e, epsfig.sty, 10 pages, 7 figures in EPS format

Scientific paper

10.1016/j.physletb.2003.09.026

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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