$K^+ \ra \pi^+ \pi^0 \gamma$ in the Standard Model and Beyond

TL;DR

This paper analyzes the decay $K^+ o \pi^+ \pi^0 \\gamma$ within the Standard Model and beyond, using improved theory and recent experimental data to understand the $s ightarrow d \\gamma$ transition and implications for new physics.

Contribution

It provides an enhanced theoretical framework combined with recent experimental results to better understand the $s ightarrow d \\gamma$ transition and explore new physics implications.

Findings

Refined understanding of $s ightarrow d \\gamma$ transition dynamics.

Constraints on new physics models from decay data.

Insights into decay mechanisms within and beyond the Standard Model.

Abstract

In this note we show how improved theoretical analysis combined with recent experimental data coming from NA48/2 concerning $K^+ \to \pi^+ \pi^0 \gamma$ decay shed light on the dynamics of the $s \rightarrow d \gamma$ transition. Consequences on NP analysis are also presented.