Study of the K- -> pi0 e- nu decay

Details Study of the K- -> pi0 e- nu decay Study of the K- -> pi0 e- nu decay

2001-12-17

arxiv.org/abs/hep-ex/0112023v1

Phys.Atom.Nucl.65:2064-2069,2002; Yad.Fiz.65:2125-2130,2002

Physics

High Energy Physics

High Energy Physics - Experiment

11 pages, Latex, 9 pictures

Scientific paper

10.1134/1.1522096

The decay K- -> pi0 e- nu has been studied using in-flight decays detected with "ISTRA+" setup operating at the 25 GeV negative secondary beam of the U-70 PS. About 130K events were used for the analysis. The lambda_+ parameter of the vector formfactor has been measured: lambda_+ = 0.0293 +- 0.0015(stat) +- 0.002(syst). The limits on the possible tensor and scalar couplings have been derived: f_T/f_+(0)=-0.044 +0.059 -0.057 (stat) f_S/f_+(0)=-0.020 +0.025 -0.016 (stat)

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