B Meson Decay Constants Using NRQCD

Recent results for B meson decay constants with NRQCD b-quarks and clover light quarks are discussed. Perturbative matching factors through O( α / M ) are now available and incorporated into the analyses. An O( αa ) improvement term to the heavy-light axial current is identified and included. The slope of ƒ PS ∑M PS M ps versus 1/ M ps is significantly reduced by these corrections.