A calculation of the semi--leptonic decays of the kaon (Kl3) is presented. The results are direct predictions of a covariant model of the pion and kaon introduced earlier by Ito, Buck, Gross. The weak form factors for Kl3 are predicted with absolutely no parameter adjustments of the model. We obtained for the form factor parameters: f−(q2=ml2)/f+(q2=ml2)=−0.28 and λ+= 0.028, both within experimental error bars. Connections of this approach to heavy quark symmetry will also be discussed.
@article{arxiv.hep-ph/9606296,
title = {Unified Description of Kaon Electroweak Form Factors},
author = {Andrei Afanasev and W. W. Buck},
journal= {arXiv preprint arXiv:hep-ph/9606296},
year = {2014}
}