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Kl4 decays beyond one loop

Bijnens, J. LU orcid ; Colangelo, G. and Gasser, J. (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.

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author
; and
publishing date
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}},
}