2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/202453As an example of an application of lattice QCD we describe a computation of four-quark operators in the nucleon. The results are interpreted in a diquark language.6 pages, 1 figure, Invited talk given by M. Göckeler at the European Workshop on the QCD Structure of the Nucleon (QCD - N'02), Ferrara, Italy, 3-6 Apr 2002High Energy Physics - LatticeHigh Energy Physics - Phenomenologytext