arXiv:hep-lat/9806009·v1·High Energy Physics — Lattice
Resummation of Cactus Diagrams in Lattice QCD
H. Panagopoulos (1)🇨🇾 · E. Vicari (2) ((1) Univ. of Cyprus (2) Univ. of Pisa)🇮🇹
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.
Comments: 18 pages