Decay Constants of B and D Mesons from Non-perturbatively Improved Lattice QCD

Abstract

The decay constants of B, D and K mesons are computed in quenched lattice QCD at two different values of the coupling. The action and operators are O(a) improved with non-perturbative coefficients. The results are f_B=195(6)(+24/-23) MeV, f_D=206(4)(+17/-10) MeV, f_B_s=220(6)(+23/-28) MeV, f_D_s=229(3)(+23/-12) MeV and f_K= 150(3)(+12/-8) MeV. Systematic errors are discussed in detail. Results for vector decay constants, flavour symmetry breaking ratios of decay constants, the pseudoscalar-vector mass splitting and D meson masses are also presented.

Major revision, using new values of improvement coefficients, the scale set by f_pi, and an extended analysis. 37 Pages, 14 figures. Accepted for publication in NPB

References in corpus (10)

• Precision computation of the strange quark's mass in quenched QCD
• Improved B -> pi l nu_l form factors from the lattice
• Application of heavy-quark effective theory to lattice QCD: I. Power Corrections
• Heavy Quark Physics on the Lattice
• Order a improved renormalization constants
• Quenched QCD with O(a) improvement: I. The spectrum of light hadrons
• Renormalization and O(a)-improvement of the static-light axial current
• f_B for Various Actions : Approaching the Continuum Limit with Dynamical Fermions
• Leptonic and semi-leptonic B decays
• A nonperturbative determination of cA

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