K_{l3} and pi_{e3} decays: radiative corrections and CKM unitarity

Abstract

We discuss radiative corrections to K_{e3} and pi_{e3} decays within chiral perturbation theory with virtual photons and leptons. We then present the extraction of the CKM elements V_{us} and V_{ud} using the presently available experimental input. Finally, we discus the test of CKM unitarity based on the present independent knowledge of V_{ud} and V_{us}, and describe the prospects of improvement with the upcoming B.R. measurements.

arXiv commentReferences added, Eq. 25 corrected. 8 pages, 1 figure, 2 tables, Talk given at the 38th Rencontres de Moriond on Electroweak Interactions and Unified Theories, Les Arcs, France, March 15-22 2003

References in corpus (9)

• $K_{\ell 3}$ decays in Chiral Perturbation Theory
• Radiative corrections to K_{l3} decays
• The CKM Matrix and the Unitarity Triangle
• New, high statistics measurement of the K+ -> pi0 e+ nu (Ke3) branching ratio
• K_l3 form factors at order p^6 in chiral perturbation theory
• Double Chiral Logs
• Electroweak Radiative Corrections to Semileptonic Tau Decays
• Radiative Corrections to the $K_{e3}^{\pm }$ Decay Revised
• Updating V_us from kaon semileptonic decays

Cited by in corpus (2)

• $K_{\ell 3}$ decays in Chiral Perturbation Theory
• Radiative Corrections and the Universality of the Weak Interactions