Renormalisation of composite operators in lattice QCD: perturbative versus nonperturbative

M. G\"ockeler , R. Horsley , Y. Nakamura , H. Perlt , D. Pleiter , P.E.L. Rakow , A. Sch\"afer , G. Schierholz

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A. Schiller H. St\"uben J.M. Zanotti

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classification ✦ hep-lat

keywords latticenonperturbativeoperatorsperturbativerenormalisationclovercollaborationcompared

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The perturbative and nonperturbative renormalisation of quark-antiquark operators in lattice QCD with two flavours of clover fermions is investigated within the research programme of the QCDSF collaboration. Operators with up to three derivatives are considered. The nonperturbative results based on the RI-MOM scheme are compared with estimates from one- and two-loop lattice perturbation theory.

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Renormalisation of composite operators in lattice QCD: perturbative versus nonperturbative

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