de Soto, FelicianoBlossier, B.Boucaud, P.Brinet, M.Du, X.Gravina, M.Morenas, V.Pène, O.Petrov, K.Rodríguez-Quintero, J.2014-06-302014-06-302012-02Physical Review D - Particles, Fields, Gravitation and Cosmology, 85 (3), art. no. 0345031550-7998http://hdl.handle.net/10433/1000This paper is a first report on the determination of ^MS¯¯¯¯¯¯ from lattice simulations with 2+1+1 twisted-mass dynamical flavors via the computation of the ghost-gluon coupling renormalized in the MOM Taylor scheme. We show this approach allows a very good control of the lattice artefacts and confirm the picture from previous works with quenched and Nf=2 twisted-mass field configurations, which prove the necessity to include nonperturbative power corrections in the description of the running. We provide an estimate of ¿MS¯¯¯¯¯¯ in very good agreement with experimental results. To our knowledge, it is the first calculation with a dynamical charm quark which makes the running up to ¿s(MZ) much safer.application/pdfenAmerican Physical SocietyGhost-gluon couplingLatticejournal articleopen accessopen access