2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/202420We 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.Lattice 2000 (Hadronic Matrix Elements), 4 pages, 2 figuresHigh Energy Physics - Latticetext