Author/Authors :
A. Ali Khan، نويسنده , , T. Bhattacharya and T. Ganguly، نويسنده , , S. Collins، نويسنده , , C.T.H. Davies، نويسنده , , R. Gupta، نويسنده , , C. Morningstar، نويسنده , , J. Shigemitsu، نويسنده , , J. Sloan، نويسنده ,
Abstract :
We present quenched results for B meson decay constants using NRQCD b quarks and O(a) tadpole improved clover light quarks. For the first time, one-loop matching factors between lattice and continuum currents are incorporated through O(α/M) taking operator mixing fully into account. This includes an important O(α a) discretization correction to the heavy-light axial vector current. We find fB=147(11)(+8−12)(9)(6) MeV and fBs/fB=1.20(4)(+4−0).
