Form factors for semi-leptonic B decays
  We report on form factors for the B->K l^+ l^- semi-leptonic decay process. We use several lattice spacings from a=0.12 fm down to 0.06 fm and a variety of dynamical quark masses with 2+1 flavors of asqtad quarks provided by the MILC Collaboration. These ensembles allow good control of the chiral and continuum extrapolations. The b-quark is treated as a clover quark with the Fermilab interpretation. We update our results for f_\parallel and f_\perp, or, equivalently, f_+ and f_0. In addition, we present new results for the tensor form factor f_T. Model independent results are obtained based upon the z-expansion. 
Ran Zhou (1), Steven Gottlieb (1), Jon A. Bailey (2), Daping Du (3),   Aida X. El-Khadra (3), R.D. Jain (3), Andreas S. Kron...
hep-lat