3 papers
hep-ph2005
The chiral logs of the K -> pi pi amplitude
Matthias Buchler
I calculate the leading logarithmic contributions up to two-loop order of the octet part of the K -> pi pi amplitude. This sector of the weak chiral Lagrangian is believed to be th…
hep-ph2005
The leading two loop counterterm in the nonleptonic weak sector of CHPT
Matthias Buchler
We calculate the leading divergences at NNLO for the octet part of the nonleptonic weak sector of chiral perturbation theory, using renormalization group methods. The role of count…
hep-ph2003
Renormalization group equations for effective field theories
Matthias Buchler, Gilberto Colangelo
We derive the renormalization group equations for a generic nonrenormalizable theory. We show that the equations allow one to derive the structure of the leading divergences at any…