arXiv:hep-ph/9606296·v1·High Energy Physics — Phenomenology

Unified Description of Kaon Electroweak Form Factors

Andrei Afanasev (CEBAF and Hampton U.) · W.W. Buck (Universität Mainz, Hampton U. and CEBAF)

Abstract

A calculation of the semi--leptonic decays of the kaon ( $K_{l 3}$ ) 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 $K_{l 3}$ are predicted with absolutely no parameter adjustments of the model. We obtained for the form factor parameters: $f_{-} (q^{2} = m_{l}^{2}) / f_{+} (q^{2} = m_{l}^{2}) = - 0.28$ and $λ_{+}$ = 0.028, both within experimental error bars. Connections of this approach to heavy quark symmetry will also be discussed.

Comments: RevTeX, 7 pages, 4 postscript figures