Heavy-light decay constants---MILC results with the Wilson action

Details Heavy-light decay constants---MILC results with the Wilson action Heavy-light decay constants---MILC results with the Wilson action

1997-07-15

arxiv.org/abs/hep-lat/9707013v1

Nucl.Phys.Proc.Suppl.60A:106-113,1998

Physics

High Energy Physics

High Energy Physics - Lattice

8 pages, 9 figures, LaTeX, uses espcrs2, epsf, Invited talk presented by S. Gottlieb at Lattice QCD on Parallel Computers, Uni

Scientific paper

10.1016/S0920-5632(97)00472-6

We present the current status of our ongoing calculations of pseudoscalar meson decay constants for mesons that contain one light and one heavy quark (f_B, f_{B_s}, f_D, f_{D_s}). We are currently generating new gauge configurations that include dynamical quarks and calculating the decay constants. In addition, we have several new results for the static approximation. Those results, as well as several refinements to the analysis, are new since Lattice '96. Our current (still preliminary) value for f_B is 156 +- 11 +- 30 +- 14 MeV, where the first error is from statistical and fitting errors, the second error is an estimate of other systematic errors within the quenched approximation and the third error is an estimate of the quenching error. For the ratio f_{B_s}/f_B, we get 1.11 +- 0.02 +- 0.03 +- 0.07.

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