Abstract
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.
Original language | English |
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Journal | Journal of High Energy Physics |
Volume | 1999 |
Issue number | JHEP01(1999) |
DOIs | |
Publication status | Published - 1999 Dec 1 |
Subject classification (UKÄ)
- Subatomic Physics
Free keywords
- 1/N Expansion
- Chiral Lagrangians
- Kaon Physics
- Weak Decays