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

Preprint

10 October 2001

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.hep-lat/0007020

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.

Keywords

SYSTEMATIC ERRORS
IMPROVED LATTICE
DECAY CONSTANTS
PERTURBATIVE
LATTICE QCD
MESON
MEV
QCD

All Related Versions

Version 1, 2000-07-14, ArXiv
Version 2, 2000-07-17, ArXiv
Version 3, 2001-10-10, ArXiv
Published version: Nuclear Physics B, 619 (1-3), 507.

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