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

Abstract

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)

11 pages, Latex, 9 pictures

Cited by in corpus (7)

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• Measurement of the Dalitz plot slope parameters for K- -> pi0 pi0 pi- decay using ISTRA+ detector
• Search for light pseudoscalar sgoldstino in K- decays
• Contributions of leptoquark interactions into the tensor and scalar form factors of K to pi l nu_l decay