LU TP 99-19, hep-ph/9907514
July 1999
I : Chiral Perturbation for Kaons
II: The $\Delta I=1/2$-rule in the Chiral Limit
Johan Bijnens
Abstract:
I : Chiral Perturbation Theory is introduced and its applications to
semileptonic and nonleptonic kaon decays are discussed.
II: The method of large $N_c$ is used to calculate $K\to\pi\pi$ nonleptonic
matrix elements, in particular the matching procedure between long and
short-distance evolution that takes all scheme dependence correctly into
account is discussed. Numerical results reproduce the $\Delta I=1/2$ rule
without the introduction of any free parameters.