The strong running coupling at $\tau$ and $Z_0$ mass scales from lattice   QCD
  This letter reports on the first computation, from data obtained in lattice QCD with $u,d,s$ and $c$ quarks in the sea, of the running strong coupling via the ghost-gluon coupling renormalized in the MOM Taylor scheme. We provide with estimates of $\ams(m_\tau^2)$ and $\ams(m_Z^2)$ in very good agreement with experimental results. Including a dynamical c quark makes safer the needed running of $\ams$. 
B. Blossier, Ph.Boucaud, M.Brinet, F. De Soto, X. Du, V. Morenas, O.   P\`ene, K. Petrov, J. Rodr\'iguez-Quintero
hep-ph hep-lat