Study of the K- -> pi0 e- nu decay
High Energy Physics - Experiment
2008-11-26 v1
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)
Cite
@article{arxiv.hep-ex/0112023,
title = {Study of the K- -> pi0 e- nu decay},
author = {I. Ajinenko and S. Akimenko and G. Akopdzhanov and K. Belous and I. Britvich and G. Britvich and A. Filin and V. Govorun and A. Inyakin and V. Konstantinov and A. Konstantinov and I. Korolkov and V. Khmelnikov and V. Leontiev and V. Novikov and V. Obraztsov and V. Polyakov and V. Romanovsky and V. Ronjin and V. Senko and N. Shalanda and M. Shapkin and V. Shelikhov and N. Smirnov and A. Sokolov and O. Tchikilev and E. Vlasov and O. Yushchenko and V. Bolotov and S. Laptev and A. Polyarush and V. Postoev and S. Yaschenko and B. Zalikhanov and V. Serdyuk},
journal= {arXiv preprint arXiv:hep-ex/0112023},
year = {2008}
}
Comments
11 pages, Latex, 9 pictures