Leptonic B- and D-meson decay constants with 2+1 flavors of asqtad fermions
Abstract
We present the status of our updated D- and B-meson decay-constant analysis, based on the MILC Nf = 2+1 asqtad gauge ensembles. Heavy quarks are incorporated using the Wilson clover action with the Fermilab interpretation. This analysis includes ensembles at five lattice spacings from a ≈ 0.045 to 0.15 fm, and light sea-quark masses down to 1/20th of the strange-quark mass. Projected error budgets for ratios of decay constants, in particular between bottom- and charm-meson decay constants, are presented.
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