Update on $f_B$

The MILC Collaboration; Bernard, C.; Blum, T.; DeGrand, T.; DeTar, C.; Gottlieb, Steven; Heller, U. M.; Hetrick, J.; McNeile, C.; Rummukainen, K.; Soni, A.; Sugar, R.; Toussaint, D.; Wingate, M.

Update on $f_B$

Authors

The MILC Collaboration

Description

We describe the current status of the MILC collaboration computation of $f_B$, $f_{B_s}$, $f_D$, $f_{D_s}$ and their ratios. Progress over the past year includes: better statistics and plateaus at $β=6.52$ (quenched), $β=5.6$ ($N_F=2$) and $β=5.445$ ($N_F=2$), new runs with a wide range of dynamical quark masses at $β=5.5$ ($N_F=2$), an estimate of the systematic errors due to the chiral extrapolation, and an improved analysis which consistently takes into account both the correlations in the data at every stage and the systematic effects due to changing fitting ranges.
Poster presented by C. Bernard at LATTICE96(heavy quarks); 4 pages of LaTeX, uses espcrc2 and epsf, four postscript figures included