High statistic study of the K- -> pi0 mu- nu decay
High Energy Physics - Experiment
2008-11-26 v1
Abstract
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.
Cite
@article{arxiv.hep-ex/0312004,
title = {High statistic study of the K- -> pi0 mu- nu decay},
author = {O. P. Yushchenko and S. A. Akimenko and K. S. Belous and G. I. Britvich and I. G. Britvich and K. V. Datsko and A. P. Filin and A. V. Inyakin and A. S. Konstantinov and V. F. Konstantinov and I. Y. Korolkov and V. A. Khmelnikov and V. M. Leontiev and V. P. Novikov and V. F. Obraztsov and V. A. Polyakov and V. I. Romanovsky and V. M. Ronjin and V. I. Shelikhov and N. E. Smirnov and O. G. Tchikilev and V. A. Uvarov and V. N. Bolotov and S. V. Laptev and A. R. Pastsjak and A. Yu. Polyarush},
journal= {arXiv preprint arXiv:hep-ex/0312004},
year = {2008}
}
Comments
11 pages, 8 EPS figures, accepted by Physics Letters B