Decay Spectrum of $K^{+}\to e^{+}{\nu }_e\gamma$

Abstract

The form factors of the $K^{+}\to \gamma$ transition are studied in the light-front quark model and chiral perturbation theory of $O(p^6)$. The decay spectrum of $K^{+}\to e^{+}{\nu }_e\gamma$, dominated by the structure dependent contribution, is illustrated in both models.

Comments: 4 pages, 2 figures, Talk given at 4th International Conference on Flavor Physics (ICFP 2007), Beijing, China, 24-28 Sep 2007