Speaker
Mario Gravina
(LPT - Universite Paris 11, Orsay (France))
Description
I present results concerning the non-perturbative evaluation of the ghost-gluon running QCD coupling constant from $N_f=2$ twisted-mass lattice calculations. Special attention is payed to the treatment of artifacts, in particular the quark mass, and to the different sources of systematical uncertainties. The value of $\Lambda_{\overline{MS}}$ is computed revealing the presence of a dimension-two $\langle A^2 \rangle$ gluon condensate.
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Primary author
Mario Gravina
(LPT - Universite Paris 11, Orsay (France))
