Johan Bijnens
Professor, Deputy Head of Division
Kl4 decays beyond one loop
Author
Summary, in English
The matrix elements for K → ππlν decays are described by four form factors F, G, H and R. We complete previous calculations by evaluating R at next-to-leading order in the low-energy expansion. We then estimate higher order contributions using dispersion relations and determine the low-energy constants L1, L2 and L3 from data on Ke4 decays and on elastic pion scattering. Finally, we present predictions for the slope of the form factor G and for total decay rates.
Publishing year
1994-10-03
Language
English
Pages
427-454
Publication/Series
Nuclear Physics, Section B
Volume
427
Issue
3
Document type
Journal article
Publisher
North-Holland
Topic
- Subatomic Physics
Status
Published
ISBN/ISSN/Other
- ISSN: 0550-3213