Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2010-03-30
Phys.Rev.D82:114511,2010
Physics
High Energy Physics
High Energy Physics - Lattice
54 pages, 15 figures; v2: several clarifications and additions, two more figures, results unchanged
Scientific paper
10.1103/PhysRevD.82.114511
We investigate the perturbative and nonperturbative renormalization of composite operators in lattice QCD restricting ourselves to operators that are bilinear in the quark fields (quark-antiquark operators). These include operators which are relevant to the calculation of moments of hadronic structure functions. The nonperturbative computations are based on Monte Carlo simulations with two flavors of clover fermions and utilize the Rome-Southampton method also known as the RI-MOM scheme. We compare the results of this approach with various estimates from lattice perturbation theory, in particular with recent two-loop calculations.
Göckeler Meinulf
Horsley Roger
Nakamura Yoshifumi
Perlt Holger
Pleiter Dirk
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