arXiv:hep-lat/9809007·v1·High Energy Physics — Lattice
Resummation of Cactus Diagrams in the Clover Improved Lattice Formulation of QCD
H. Panagopoulos (1)🇨🇾 · E. Vicari (2) ((1) Univ. of Cyprus (2) Univ. of Pisa)🇮🇹
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 improving their one-loop perturbative estimates.
Comments: 8 pages, 2 figures