ar X iv : h ep - l at / 0 61 10 09 v 1 7 N ov 2 00 6 B meson decays from moving - NRQCD on fine MILC lattices
نویسندگان
چکیده
Lattice simulations of B → π lν decays are problematic in the low q2 region when the pion has to have large momentum in the lattice frame for a B meson at rest or moving slowly. The movingNRQCD formalism provides a way around this by giving an accurate discretization of a b quark moving at arbitrary velocity v, and therefore a B meson moving at high momentum in the lattice frame. Here we show results from simulations of the moving-NRQCD action complete through O(1/M) coupled to the asqtad action on a MILC fine ensemble. We show B, B∗ masses as a function of v and demonstrate how to determine the meson kinetic mass and the renormalization of v non-perturbatively. We will also discuss the perturbative renormalization of the movingNRQCD action from high-β Monte Carlo simulations.
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