Resummation of cactus diagrams in lattice QCD
Date
1998Source
Physical Review D - Particles, Fields, Gravitation and CosmologyVolume
58Issue
11Google Scholar check
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We show how to perform a resummation, to all orders in perturbation theory, of a certain class of gauge-invariant diagrams in lattice QCD. These diagrams are often largely responsible for lattice artifacts. Our resummation leads to an improved perturbative expansion. Applied to a number of cases of interest, this expansion yields results remarkably close to corresponding nonperturbative estimates.