Coupling Constant and Quark Loop Expansion for Corrections to the Valence Approximation

W. Lee; D. Weingarten

doi:10.1103/physrevd.59.094508

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arXiv · hep-lat/9811024

Coupling Constant and Quark Loop Expansion for Corrections to the Valence Approximation

W. Lee·D. Weingarten

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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.

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W. Lee, D. Weingarten. 1999-02-15. Coupling Constant and Quark Loop Expansion for Corrections to the Valence Approximation. https://doi.org/10.1103/physrevd.59.094508

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