F. Butler, H. Chen, et al.
Physical Review Letters
Paper
Error estimate for the valence approximation and for a systematic expansion of full QCD
Abstract
We construct a systematic expansion for the lattice formulation of full QCD. The leading term is the valence (quenched) approximation. An error estimate for any truncation of this expansion is then obtained from a second expansion of full QCD, indexed by the number of virtual fermion loops included in each term. © 1997 The American Physical Society.
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