RI/MOM renormalization constants (N_f=4) and the strong coupling   constant (N_f=2+1+1) from twisted-mass QCD
  We study RI/MOM renormalization constants of bilinear quark operators for $N_f=4$ and the strong coupling constant for $N_f=2+1+1$ 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 $Z_q$ and $\alpha_s$, from which we are able to extract the Landau gauge dimension-two gluon condensate $<A^2>$ which is of phenomenological interest. 
B. Blossier, Ph. Boucaud, M. Brinet, F. De Soto, X. Du, M. Gravina, Z.   Liu, V. Morenas, O. P\`ene, K. Petrov, J. Rodr\'igu...
hep-lat