出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：In this presentation we review our recent attempt to address two questions concerning dynamical
correlations inside the nucleon: (i) is the non-perturbative quark-quark interaction particularly
attractive in the color antitriplet 0+ diquark channel? (ii) are such correlations induced by instantons?
We define appropriate ratios of Euclidean three-point functions which encode specific
information about two-body correlations and can be computed on the lattice. We analyze such correlations
functions in different models with very different diquark content: a naive non-relativistic
SU(6) quark model, the Random Instanton Liquid Model and the Quark Chiral Soliton Model.
We show that such models lead to radically different predictions. We conclude that a lattice QCD
calculation of such correlation functions can determine which picture is most realistic.
