K-l3 decays in chiral perturbation theory

Summary, in English

The process K-l3 is calculated to two-loop order (p(6)) in chiral perturbation theory (ChPT) in the isospin conserved case. We present expressions suitable for use with previous work in two-loop ChPT where the order p(4) parameters (L-i(r)) were determined from experiment. We point out that all the order p(6) parameters (C-i(r)) that appear in the value of f(+)(0) relevant for the determination of V-us can be determined from K-l3 measurements via the slope and the curvature of the scalar form-factor. As by product we update the value of the CKM matrix element V-us. (C) 2003 Elsevier B.V. All rights reserved.

• Author: Johan Bijnens; P Talavera
• Department/s: Theoretical Particle Physics - Has been reorganised
• Publishing year: 2003
• Language: English
• Pages: 341-362
• Publication/Series: Nuclear Physics, Section B
• Volume: 669
• Issue: 1-2
• Links: http://dx.doi.org/10.1016/S0550-3213(03)00581-9
• Document type: Journal article
• Publisher: Elsevier
• Topic: Subatomic Physics
• Status: Published
• ISBN/ISSN/Other: ISSN: 0550-3213