出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We study RI/MOM renormalization constants of bilinear quark operators for Nf = 4 and the strong coupling constant for Nf = 2+1+1 using Wilson twisted-mass fermions. We use the “egalitarian” method to remove H(4) hypercubic artifacts non-perturbatively, which enables us to study physical quantities in a wide range of momenta. We then apply OPE in studying the running behavior of Zq and as, from which we are able to extract the Landau gauge dimension-two gluon condensate hA2i which is of phenomenological interest.
