Johan Bijnens
Professor, Deputy Head of Division
The ΔI = 1/2 rule in the chiral limit
Author
Summary, in English
We discuss the matching between long-distance and short-distance at next-to-leading in 1/Nc and show how the scheme-dependence from the two-loop renormalization group running can be treated. We then use this method to study the three O(p2) terms contributing to non-leptonic kaon decays, namely the usual octet and 27-plet derivative terms as well as the weak mass term using the Extended Nambu Jona-Lasinio model as the low energy approximation. We also discuss subtleties in the momentum routing in the low energy theory and a problem in separating factorizable and non-factorizable contributions from the Q6 operator in the chiral limit. We update our earlier results on the BK parameter as well.
Department/s
- Theoretical Particle Physics - Has been reorganised
Publishing year
1999-12-01
Language
English
Publication/Series
Journal of High Energy Physics
Volume
1999
Issue
JHEP01(1999)
Document type
Journal article
Publisher
Springer
Topic
- Subatomic Physics
Keywords
- 1/N Expansion
- Chiral Lagrangians
- Kaon Physics
- Weak Decays
Status
Published
ISBN/ISSN/Other
- ISSN: 1029-8479