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. [S0556-2821(98)09319-9].
Resummation of cactus diagrams in lattice QCD
VICARI, ETTORE
1998-01-01
Abstract
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. [S0556-2821(98)09319-9].File in questo prodotto:
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