Analysis of $K^{+}\to e^{+}{\nu }_e\gamma$ in light-front quark model and chiral perturbation theory of order $p^6$

Chuan-Hung Chen, Chao-Qiang Geng, Chong-Chung Lih

Within the frameworks of the light-front quark model (LFQM) and chiral perturbation theory (ChPT) of $O(p^6)$, we reevaluate the form factors of the $K^{+}\to \gamma$ transition. We use…