paper

Lattice QCD calculation of form factors describing the rare decays and

arXiv:1310.3722 · doi:10.1103/PhysRevD.89.094501

Abstract

The rare decays and are now being observed with enough precision to test Standard Model predictions. A full understanding of these decays requires accurate determinations of the corresponding hadronic form factors. Here we present results of lattice QCD calculations of the and form factors; we also determine the form factors relevant for the tree-level decays . We use full-QCD configurations including 2+1 flavors of sea quarks using an improved staggered action, and we employ lattice non-relativistic QCD to describe the bottom quark.

23 pages. Version 3 (accepted to Phys. Rev. D) includes interpolations to the physical strange quark mass. Central values shift by less than 1 sigma. Tables and figures updated accordingly

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