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Photo of Johan Bijnens

Johan Bijnens

Professor

Photo of Johan Bijnens

Kl4 decays beyond one loop

Author

  • J. Bijnens
  • G. Colangelo
  • J. Gasser

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