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 and WITTIG, H (1994) Quenched heavy-light decay constants. Physical Review D , 49 (3).
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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.
This is a Submitted version This version's date is: 1/2/1994 This item is not peer reviewed
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