Scaling behavior of $f_{B}$ with NRQCD

Details Scaling behavior of $f_{B}$ with NRQCD Scaling behavior of $f_{B}$ with NRQCD

1998-09-20

arxiv.org/abs/hep-lat/9809152v1

Nucl.Phys.Proc.Suppl. 73 (1999) 363-365

Physics

High Energy Physics

High Energy Physics - Lattice

LATTICE98(matrixelement), 3 pages, 3 eps figures

Scientific paper

10.1016/S0920-5632(99)85074-9

We investigate the scaling behavior of the $B$ meson decay constant $f_B$ and $f_{B_{s}}$ at $\beta$$=$$5.7, 5.9, 6.1$, employing the NRQCD heavy quark action and the clover light quark action. Mixing effect from dimension-4 operator in the heavy-light axial-vector current is studied, and we find that the $a$ dependence of $f_B$ is significantly reduced. Our preliminary result for the decay constants in the quenched approximation is $f_{B}$$=$$162(^{+35}_{-18})$ MeV, $f_{B_{s}}$$=$$190(^{+40}_{-19})$ MeV, and $f_{B_{s}}/f_{B}$$=$$1.18(^{+6}_{-6})$.

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