Matrix elements of leftright four fermion operators and the electropenguin contribution to epsilon'/epsilon in lattice QCD with Wilson fermions
Abstract
The Kpi and Kpipi elements of leftright four fermion operators in quenched lattice QCD at beta=6 are computed. The softpion 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 piK 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