Electromagnetic effects in Kl3 decays
Vincenzo Cirigliano (Los Alamos), Maurizio Giannotti (Los Alamos),, Helmut Neufeld (University of Vienna)
TL;DR
This paper calculates electromagnetic radiative corrections to Kl3 decays using chiral effective field theory, providing essential theoretical input for precise determination of the CKM matrix element Vus.
Contribution
It offers new calculations for Kmu3 modes and updates previous results on Ke3 modes within a comprehensive theoretical framework.
Findings
Radiative corrections significantly impact Kl3 decay rates.
Updated theoretical predictions improve Vus extraction accuracy.
Results support more precise tests of the Standard Model.
Abstract
We study the radiative corrections to all Kl3 decay modes to leading non-trivial order in the chiral effective field theory, working with a fully inclusive prescription on real photon emission. We present new results for Kmu3 modes and update previous results on Ke3 modes. Our analysis provides important theoretical input for the extraction of the CKM element Vus from Kl3 decays.
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