Radiative modes $K^+\to\pi^+\gamma^*\gamma^{(*)}$ and the   $K^+\to\pi^+4e$ decay

Tom\'a\v{s} Husek (Lund U.)

arXiv:2211.11599·hep-ph·March 22, 2023

Radiative modes $K^+\to\pi^+\gamma^\gamma^{()}$ and the $K^+\to\pi^+4e$ decay

Tom\'a\v{s} Husek (Lund U.)

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TL;DR

This paper analyzes radiative decay modes of charged kaons, focusing on corrections and branching ratios for specific decay channels involving pions and multiple leptons within the Standard Model.

Contribution

It provides the first leading-order Standard Model calculation of the branching ratio for the $K^+ o ext{pi}^+ e^+ e^- e^+ e^-$ decay and examines radiative corrections for related processes.

Findings

01

Calculated the branching ratio for $K^+ o ext{pi}^+ e^+ e^- e^+ e^-$ decay.

02

Analyzed radiative corrections for $K^+ o ext{pi}^+ ext{l}^+ ext{l}^-$ decays.

03

Discussed implications for Standard Model predictions.

Abstract

We discuss radiative transitions of a charged kaon to a pion and two photons. In particular, we have a closer look at radiative corrections for the $K^{+} \to π^{+} ℓ^{+} ℓ^{-}$ decays and present the branching ratio of the $K^{+} \to π^{+} e^{+} e^{-} e^{+} e^{-}$ process calculated for the first time at leading order in the Standard Model.

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Taxonomy

TopicsParticle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions · Computational Physics and Python Applications