Kl4 decays beyond one loop
Research output: Contribution to journal › Article
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.
|Research areas and keywords||
Subject classification (UKÄ) – MANDATORY
|Number of pages||28|
|Journal||Nuclear Physics, Section B|
|Publication status||Published - 1994 Oct 3|