We analyze hadron as well as quark and diquark correlation functions in Landau gauge in order to extract information on the spin dependence of the quark-quark interaction. We find evidence that the N-Delta mass splitting can be attributed to the spin dependence of the interaction between quarks in a colour anti-triplet state with spin 0 and 1, respectively. The lightest excitations are observed in the S=0 channel. However, no evidence for a deeply bound diquark state is found.
@article{arxiv.hep-lat/9809011,
title = {Constituent Quarks, Diquarks and the N-Delta Mass Splitting},
author = {F. Karsch and M. Hess and E. Laermann and I. Wetzorke},
journal= {arXiv preprint arXiv:hep-lat/9809011},
year = {2016}
}