We report on form factors for the B → Kl+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 fk and f, or, equivalently, f+ and f0. In addition, we present new results for the tensor form factor fT . Model independent results are obtained based upon the z-expansion.
|Journal||Proceedings of Science|
|Publication status||Published - 2012|
|Event||30th International Symposium on Lattice Field Theory, Lattice 2012 - Cairns, Australia|
Duration: 2012 Jun 24 → 2012 Jun 29
Bibliographical noteFunding Information:
Advanced Computing Center, which are funded through the National Science Foundation’s Tera-grid/XSEDE Program. This work was supported in part by the U.S. Department of Energy under Grants No. DE-FG02-91ER40661 (S.G., R.Z.), No. DE-FG02-91ER40677 (D.D., R.D.J., A.X.K.), No. DE-FG02-91ER40664 (Y.L., Y.M.). Fermilab is operated by Fermi Research Alliance, LLC, under Contract No. DE-AC02-07CH11359 with the United States Department of Energy. J.A.B. is supported by the Creative Research Initiatives program (2012-0000241) of the NRF grant funded by the Korean government (MEST).
Computations for this work were carried out with resources provided by the USQCD Collaboration, the Argonne Leadership Computing Facility, and the National Energy Research Scientific Computing Center, which are funded by the Office of Science of the U.S. Department of Energy; and with resources provided by the National Institute for Computational Science, and the Texas
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