B and D meson decay constants in lattice QCD

被引：0
|
作者：
El-Khadra, AX
Kronfeld, AS
Mackenzie, PB
Ryan, SM
Simone, JN
机构：
[1] Univ Illinois, Dept Phys, Urbana, IL 61801 USA
[2] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA
来源：
PHYSICAL REVIEW D | 1998年 / 58卷 / 01期
关键词：
D O I：
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中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We have calculated the decay constants of B and D mesons with lattice QCD. We use an O(a)-improved action that takes light quark actions as a starting point, tuned so that it can be directly applied at the physical masses of the b and c quarks. Our results are f(B)=164(-11)(+14)+/-8 MeV, f(Bs)=185(-8)(+13)+/-9 MeV, f(D)=194(-10)(+14) +/-10 MeV, and f(Ds)=213(-11)(+14)+/-11 MeV in the quenched approximation. The first error in each case is statistical, and the second is from perturbation theory. We show that discretization errors are under control in our approach and smaller than our statistical errors. The effects of the quenched approximation may raise our quenched result by up to 10%. [S0556-2821(98)07013-1].
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页数：10
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