The leading two loop counterterm in the nonleptonic weak sector of CHPT
Abstract
Description
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 counterterms which vanish at the equation of motion and their use to simplify the calculation is shown explicitly. The obtained countertem Lagrangian can be employed to calculate the chiral double log contributions of quantities in this sector, most notably the K --> pi pi amplitude. The double log contribution of the latter is discussed in a separate paper.
28 pages, 3 figures, uses axodraw
28 pages, 3 figures, uses axodraw