出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We report on preliminary non-perturbative computations of the renormalization constants in the RI-MOM scheme relevant for the lattice action currently used by the European Twisted Mass Collaboration (ETMC) and for Nf = 4 flavours of active dynamical quarks. The knowledge of these constants is necessary in order to extract physical quantities from the rich program of lattice QCD simulations being performed by the ETMC. This step will enable the precise computation (at a few percent level) of quantities like quark masses, leptonic decay constants, form factors, bag-parameters, which play a major role in the determination of the CKM matrix elements. For the purpose of this investigation dedicated simulations with four degenerate sea quark flavours are being performed. We also comment on issue of code optimization for the Aurora machine.
