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Resummation of cactus diagrams in the clover improved lattice formulation of QCD - art. no. 057503

Authors

Panagopoulos, H Vicari, E

Citation

H. Panagopoulos et E. Vicari, Resummation of cactus diagrams in the clover improved lattice formulation of QCD - art. no. 057503, PHYS REV D, 5905(5), 1999, pp. 7503

Citations number

Categorie Soggetti

Physics

Journal title

PHYSICAL REVIEW D

ISSN journal

05562821 → ACNP

Volume

5905

Issue

Year of publication

1999

Database

ISI

SICI code

0556-2821(19990301)5905:5<7503:ROCDIT>2.0.ZU;2-F

Abstract

We extend to the clover improved lattice formulation of QCD the resummation of cactus diagrams, i.e., a certain class of tadpole-like gauge invariant diagrams. Cactus resummation yields an improved perturbative expansion. We apply it to the lattice renormalization of some two-fermion operators impro ving their one-loop perturbative estimates. [S0556-2821(99)03905-3].