Quenched heavy-light decay constants
- BAXTER, R M
- BOOTH, S P
- BOWLER, K C
- COLLINS, S
- HENTY, D S
- KENWAY, R D
- RICHARDS, D G
- SHANAHAN, H P
- SIMONE, J N
- SIMPSON, A D
- WILKES, B E
- EWING, A K
- LELLOUCH, L
- SACHRAJDA, C T
- WITTIG, H
DOIAbstract
We present results for heavy-light decay constants, using both propagating quarks and the static approximation, in 0(a)-improved, quenched lattice QCD. At beta=6.2 on a 24(3)X48 lattice we findf(D)=185(-3)(+4)(stat)(-7)(+42)(syst) MeV, f(B)= 160(-6-19)(+6+53) MeV, f(Ds)/f(D)=1.18(-2)(+2), and f(Bs)/f(B)=1.22(-3)(+4), in good agreement with earlier studies. From the static theory we obtain f(B)(stat)=253(-15-15)(+16+105) MeV. We also present results from a simulation at beta=6.0 on a 16(3)X48 lattice, which are consistent with those at beta=6.2. In order to study the effects of improvement, we present a direct comparison of the results using both the Wilson and the improved action at beta=6.0
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