Talk presented by Vicente Gimenez

Parallel Session: Heavy Quarks III

Thursday July 1st, 14.50 - 15.10, Pacinotti Room

NNLO unquenched lattice determination of the b quark mass

Abstract: We have computed the $\overline{MS}$ mass of the b quark from lattice simulations of the two-point correlation functions of the $B_{d}$ and $B_{s}$ mesons. The dynamics of the light quarks have been described using an unquenched Wilson action with two sea quarks ($N_{f}=2$). The heavy quark degrees of freedom have been simulated utilizing the lattice version of the HQET. In addition, in order to reduce the renormalon ambiguities in the conversion of the lattice mass to the continuum $\overline{MS}$ b quark mass, we have used the recently calculated NNLO expression for the matching.

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