2007/01/31 by A. Ali Khan, V. Braun, V. M. Braun +8
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-lat
paper · pdf · doi:10.1016/j.physletb.2007.06.066
published as Phys.Lett.B652:150-157,2007 · 13 pages, 7 figures. Replaced version contains analysis in terms of improved quark masses instead of bare quark masses, result for f_B changed by 1 MeV. Several typos corrected, in particular error bars in table 4. Version accepted in PLB
arxiv created 2007/06/29 · openalex publication_date 2007/07/02 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31
We compute decay constants of heavy–light mesons in quenched lattice QCD with a lattice spacing of a≃0.04fm using non-perturbatively O(a) improved Wilson fermions and O(a) improved currents. We obtain fDs=220(6)(5)(11)MeV, fD=206(6)(3)(22)MeV, fBs=205(7)(26)(17)MeV and fB=190(8)(23)(25)MeV, using the Sommer parameter r0=0.5fm to set the scale. The first error is statistical, the second systematic and the third from assuming a ±10% uncertainty in the experimental value of r0. A detailed discussion is given in the text. We also present results for the meson decay constants fK and fπ and the ρ meson mass.