Matrix elements of left-right four fermion operators and the electropenguin contribution to epsilon'/epsilon in lattice QCD with Wilson fermions
Abstract
The K-pi and K-pi-pi elements of left-right four fermion operators in quenched lattice QCD at beta=6 are computed. The soft-pion relations derived from the chiral structure of the operators are checked. A large enhancement of matrix elements is observed and interpreted as the effect of a scalar octet pole in the pi-K channel. This observation has implications for the related calculation of weak matrix elements.
- Publication:
-
Unknown
- Pub Date:
- October 1988
- Bibcode:
- 1988melr.rept.....F
- Keywords:
-
- Fermions;
- Lattices (Mathematics);
- Matrices (Mathematics);
- Quantum Chromodynamics;
- Chiral Dynamics;
- Pions;
- Quenching (Atomic Physics);
- Atomic and Molecular Physics