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Resummation of cactus diagrams in lattice QCD - art. no. 114501

Authors

Panagopoulos, H Vicari, E

Citation

H. Panagopoulos et E. Vicari, Resummation of cactus diagrams in lattice QCD - art. no. 114501, PHYS REV D, 5811(11), 1998, pp. 4501

Citations number

Categorie Soggetti

Physics

Journal title

PHYSICAL REVIEW D

ISSN journal

05562821 → ACNP

Volume

5811

Issue

Year of publication

1998

Database

ISI

SICI code

0556-2821(199812)5811:11<4501:ROCDIL>2.0.ZU;2-Q

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 diagr ams are often largely responsible for lattice artifacts. Our resummation le ads to an improved perturbative expansion. Applied to a number of cases of interest, this expansion yields results remarkably close to corresponding n onperturbative estimates. [S0556-2821(98)09319-9].