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

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

2003-05-14

arxiv.org/abs/hep-ph/0305154v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

References added, Eq. 25 corrected. 8 pages, 1 figure, 2 tables, Talk given at the 38th Rencontres de Moriond on Electroweak I

Scientific paper

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.

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