Johan Bijnens
Professor, Deputy Head of Division
Validity of chiral perturbation theory for K0-K0 mixing
Author
Summary, in English
Chiral perturbation theory relates the |S|=2 matrix element K0|(sd)V-A×(sd)V-A|K0 to the |S|=1 matrix element +0|(sd)V-A(uu)V-A+(su)V- A×(ud)V-A-(sd)V-A(dd)V-A|K+. The latter matrix element is measured in K++0 decay and the former matrix element is relevant for the predictions that the standard model makes for CP nonconservation in K0-K0 mixing. In this paper the corrections of order mK4 lnmK2 to lowest-order chiral perturbation theory (i.e., order mK2) for these matrix elements are computed. The correction is large for the |S|=2 matrix element indicating a breakdown of chiral perturbation theory.
Publishing year
1984-01-01
Language
English
Pages
2367-2370
Publication/Series
Physical Review Letters
Volume
53
Issue
25
Document type
Journal article
Publisher
American Physical Society
Topic
- Subatomic Physics
Status
Published
ISBN/ISSN/Other
- ISSN: 0031-9007