On the validity of chiral perturbation theory for weak hyperon decays
(1985) In Nuclear Physics, Section B 261. p.185-198- Abstract
The predictions of chiral perturbation theory for the weak non-leptonic decays of hyperons are examined beyond the leading order. For the S-wave amplitudes we find that the leading corrections to lowest order chiral perturbation theory preserve the vanishing of the Σ+ → nπ+ amplitude. However, the Lee-Sugawara relation gets a large correction indicating a breakdown of chiral perturbation theory for this relation. For the P-wave amplitudes we find that the leading corrections to lowest order chiral perturbation theory are large indicating a breakdown of chiral perturbation theory for the P-wave amplitudes. The weak semileptonic hyperon decays are determined by baryon matrix elements of the left-handed current.... (More)
The predictions of chiral perturbation theory for the weak non-leptonic decays of hyperons are examined beyond the leading order. For the S-wave amplitudes we find that the leading corrections to lowest order chiral perturbation theory preserve the vanishing of the Σ+ → nπ+ amplitude. However, the Lee-Sugawara relation gets a large correction indicating a breakdown of chiral perturbation theory for this relation. For the P-wave amplitudes we find that the leading corrections to lowest order chiral perturbation theory are large indicating a breakdown of chiral perturbation theory for the P-wave amplitudes. The weak semileptonic hyperon decays are determined by baryon matrix elements of the left-handed current. Corrections to the predictions of lowest order chiral perturbation theory for these matrix elements are computed. These corrections are very small.
(Less)
- author
- Bijnens, J. LU ; Sonoda, H. and Wise, Mark B.
- publishing date
- 1985-01-01
- type
- Contribution to journal
- publication status
- published
- in
- Nuclear Physics, Section B
- volume
- 261
- pages
- 14 pages
- publisher
- North-Holland
- external identifiers
-
- scopus:0000491740
- ISSN
- 0550-3213
- DOI
- 10.1016/0550-3213(85)90569-3
- language
- English
- LU publication?
- no
- id
- bd8ad1f5-b7ea-4610-b04e-7793703a1a4e
- date added to LUP
- 2019-05-03 09:21:42
- date last changed
- 2021-08-22 05:23:51
@article{bd8ad1f5-b7ea-4610-b04e-7793703a1a4e, abstract = {{<p>The predictions of chiral perturbation theory for the weak non-leptonic decays of hyperons are examined beyond the leading order. For the S-wave amplitudes we find that the leading corrections to lowest order chiral perturbation theory preserve the vanishing of the Σ<sup>+</sup> → nπ<sup>+</sup> amplitude. However, the Lee-Sugawara relation gets a large correction indicating a breakdown of chiral perturbation theory for this relation. For the P-wave amplitudes we find that the leading corrections to lowest order chiral perturbation theory are large indicating a breakdown of chiral perturbation theory for the P-wave amplitudes. The weak semileptonic hyperon decays are determined by baryon matrix elements of the left-handed current. Corrections to the predictions of lowest order chiral perturbation theory for these matrix elements are computed. These corrections are very small.</p>}}, author = {{Bijnens, J. and Sonoda, H. and Wise, Mark B.}}, issn = {{0550-3213}}, language = {{eng}}, month = {{01}}, pages = {{185--198}}, publisher = {{North-Holland}}, series = {{Nuclear Physics, Section B}}, title = {{On the validity of chiral perturbation theory for weak hyperon decays}}, url = {{http://dx.doi.org/10.1016/0550-3213(85)90569-3}}, doi = {{10.1016/0550-3213(85)90569-3}}, volume = {{261}}, year = {{1985}}, }