B meson decays from moving NRQCD on fine MILC lattices

Details B meson decays from moving NRQCD on fine MILC lattices B meson decays from moving NRQCD on fine MILC lattices

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006slft.confe..99w&link_type=abstract

Proceedings of the XXIVth International Symposium on Lattice Field Theory. July 23-28, 2006, Tucson, Arizona., p.99.1

Computer Science

Scientific paper

Lattice simulations of B → πlν 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 moving- NRQCD 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 moving- NRQCD action from high-β Monte Carlo simulations.

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