Diquark Masses from Lattice QCD
High Energy Physics - Lattice
2009-12-30 v2 High Energy Physics - Phenomenology
Abstract
We present first results for diquark correlation functions calculated in Landau gauge on the lattice. Masses have been extracted from the long distance behaviour of these correlation functions. We find that the ordering of diquark masses with spin 0 and 1 states in colour anti-triplet and sextet channels is in accordance with instanton motivated interaction models. Although we find evidence for an attractive interaction in colour anti-triplet states with a splitting between spin 0 and spin 1 diquarks that can account for the mass splitting between the nucleon and the delta, there is no evidence for a deeply bound diquark state.
Keywords
Cite
@article{arxiv.hep-lat/9804023,
title = {Diquark Masses from Lattice QCD},
author = {M. Hess and F. Karsch and E. Laermann and I. Wetzorke},
journal= {arXiv preprint arXiv:hep-lat/9804023},
year = {2009}
}
Comments
12 pages, LaTeX2e uses revtex, 3 EPS-figures, small corrections, references updated