Coupling Constant and Quark Loop Expansion for Corrections to the Valence Approximation
High Energy Physics - Lattice
2009-10-31 v2 High Energy Physics - Phenomenology
Abstract
For full QCD vacuum expectation values we construct an expansion in quark loop count and in powers of a coupling constant. The leading term in this expansion is the valence (quenched) approximation vacuum expectation value. Higher terms give corrections to the valence approximation. A test of the expansion is presented for moderately heavy quarks on a small lattice. We consider briefly an application of the expansion to quarkonium-glueball mixing.
Cite
@article{arxiv.hep-lat/9811024,
title = {Coupling Constant and Quark Loop Expansion for Corrections to the Valence Approximation},
author = {W. Lee and D. Weingarten},
journal= {arXiv preprint arXiv:hep-lat/9811024},
year = {2009}
}
Comments
16 pages, 5 figures, version to appear in PRD including additional discussion of Boglione and Pennington paper on consequences of valence approximation corrections for quarkonium-glueball mixing