Structure-dependent radiative corrections to phi -> K^+K^-/K_LK_S decays

TL;DR

This paper refines theoretical predictions for phi meson decay rate ratios by incorporating electromagnetic structure effects of kaons and other model-dependent radiative corrections, addressing discrepancies with experimental data.

Contribution

It introduces a detailed estimation of electromagnetic structure effects and model-dependent contributions to radiative corrections in phi decays, improving theoretical accuracy.

Findings

Electromagnetic structure effects significantly impact decay rate ratios.

Model-dependent contributions are non-negligible in radiative corrections.

Refined predictions better align with experimental measurements.

Abstract

Current predictions for the ratio of phi -> K^+K^-/K_LK_S decay rates exceed the corresponding experimental value in about five standard deviations. By far, the dominant sources of isospin breaking to this ratio are the phase-space (52%) and the electromagnetic radiative (4.3%, computed within scalar QED) corrections. Here we estimate the effects of the electromagnetic structure of kaons and other model-dependent contributions into the radiative corrections.