arXiv:hep-lat/0010043·v1·High Energy Physics — Lattice
Four-quark operators in hadrons
S. Capitani · M. Gockeler · R. Horsley · B. Klaus · W. Kurzinger · D. Petters · D. Pleiter · P.E.L. Rakow · S. Schaefer · A. Schafer · G. Schierholz
Abstract
We present calculations of matrix elements of 4-quark operators in the pion and in the nucleon extracted from quenched Monte Carlo simulations at beta = 6.0 using Wilson fermions. These operators are relevant for higher-twist effects. We are particularly careful to avoid mixing with lower-dimensional operators by choosing appropriate flavour structures.
Comments: Lattice 2000 (Hadronic Matrix Elements), 4 pages, 2 figures