B and D meson decay constants in lattice QCD
Nov, 1997
21 pages
Published in:
- Phys.Rev.D 58 (1998) 014506
e-Print:
- hep-ph/9711426 [hep-ph]
Report number:
- FERMILAB-PUB-97-322-T
Citations per year
Abstract:
We have calculated the decay constants of B and mesons with lattice QCD. We use an 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 and quarks. Our results are f_B = 164 \err{+14}{-11} \pm 8 MeV, f_{B_s} = 185 \err{+13}{-8} \pm 9 MeV, f_D = 194 \err{+14}{-10} \pm 10 MeV, and f_{D_s} = 213 \err{+14}{-11} \pm 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%.- lattice field theory: action
- gauge field theory: SU(3)
- heavy quark
- B: decay constant
- D: decay constant
- B/s: decay constant
- D/s: decay constant
- approximation: quenching
- numerical calculations: Monte Carlo
- tables
References(26)
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