Kl4 decays beyond one loop
(1994) In Nuclear Physics, Section B 427(3). p.427-454- Abstract
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.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/07786bf5-bbb0-49fe-b513-b2a573b7a445
- author
- Bijnens, J. LU ; Colangelo, G. and Gasser, J.
- publishing date
- 1994-10-03
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Nuclear Physics, Section B
- volume
- 427
- issue
- 3
- pages
- 28 pages
- publisher
- North-Holland
- external identifiers
-
- scopus:0001202793
- ISSN
- 0550-3213
- DOI
- 10.1016/0550-3213(94)90634-3
- language
- English
- LU publication?
- no
- id
- 07786bf5-bbb0-49fe-b513-b2a573b7a445
- date added to LUP
- 2019-05-03 09:29:30
- date last changed
- 2021-09-26 04:15:30
@article{07786bf5-bbb0-49fe-b513-b2a573b7a445, abstract = {{<p>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 L<sub>1</sub>, L<sub>2</sub> and L<sub>3</sub> from data on K<sub>e4</sub> decays and on elastic pion scattering. Finally, we present predictions for the slope of the form factor G and for total decay rates.</p>}}, author = {{Bijnens, J. and Colangelo, G. and Gasser, J.}}, issn = {{0550-3213}}, language = {{eng}}, month = {{10}}, number = {{3}}, pages = {{427--454}}, publisher = {{North-Holland}}, series = {{Nuclear Physics, Section B}}, title = {{Kl4 decays beyond one loop}}, url = {{http://dx.doi.org/10.1016/0550-3213(94)90634-3}}, doi = {{10.1016/0550-3213(94)90634-3}}, volume = {{427}}, year = {{1994}}, }