Perturbative QCD with Quark and Gluon Condensates
High Energy Physics - Phenomenology
2007-05-23 v1
Abstract
The quark <\bar\psi \psi> and gluon <F_{\mu\nu}F^{\mu\nu}> vacuum expectation values are non-vanishing at low orders in \alpha_s when the perturbative ground state includes quark and gluon pairs. This offers possibilities of studying the effects of a non-trivial vacuum using formally exact perturbative methods. The QCD Feynman rules are modified only for the free, on-shell quark and gluon propagators at zero four-momentum. Gauge and lorentz invariance is maintained, while chiral symmetry is spontaneously broken by the ground state.
Keywords
Cite
@article{arxiv.hep-ph/0209318,
title = {Perturbative QCD with Quark and Gluon Condensates},
author = {Paul Hoyer},
journal= {arXiv preprint arXiv:hep-ph/0209318},
year = {2007}
}
Comments
Talk at ICHEP 2002, Amsterdam (July 2002). 3 pages, 2 figures