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

TL;DR

This paper investigates the decay spectrum of the process $K^+ o e^+ u_{e} ext{ }\gamma$ using light-front quark models and chiral perturbation theory, focusing on the structure-dependent contributions to understand the underlying form factors.

Contribution

It compares form factor calculations from light-front quark models and chiral perturbation theory at order $p^6$ for the first time in this decay process.

Findings

Decay spectrum dominated by structure-dependent contribution.

Form factors calculated in both models show consistent behavior.

Results provide insights into the $K^+ o ext{e}^+ u_e ext{ }\gamma$ decay dynamics.

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.