We compute the quark-gluon vertex in quenched lattice QCD, in the Landau gauge using an off-shell mean-field O(a)-improved fermion action. The complete vertex is computed in two specific kinematical limits, while the Dirac-vector part is computed for arbitrary kinematics. We find a nontrivial and rich tensor structure, including a substantial infrared enhancement of the interaction strength regardless of kinematics.
@article{arxiv.hep-lat/0408032,
title = {Quark-gluon vertex in arbitrary kinematics},
author = {Jon-Ivar Skullerud and Patrick O. Bowman and Ayse Kizilersu and Derek B. Leinweber and Anthony G. Williams},
journal= {arXiv preprint arXiv:hep-lat/0408032},
year = {2010}
}
Comments
6 pages, 8 figures, talk by JIS at QCD Down Under, Adelaide, 10-19 March 2004