A precise determination of the decay constant of the Ds-meson in quenched QCD

We present a lattice determination of the leptonic decay constant FDs of the Ds-meson using its mass and FK as experimental input. Setting the scale with FK=160 MeV, our final result is FDs=252(9) MeV. The error contains all uncertainties apart from the quenched approximation. Setting the scale with...

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Bibliographic Details
Published in:Physics letters. B 2003-05, Vol.560 (1-2), p.59-63
Main Authors: Jüttner, Andreas, Rolf, Juri
Format: Article
Language:English
Subjects:
CKM-matrix
Heavy-light mesons
Lattice QCD
Leptonic decay constant
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Summary:We present a lattice determination of the leptonic decay constant FDs of the Ds-meson using its mass and FK as experimental input. Setting the scale with FK=160 MeV, our final result is FDs=252(9) MeV. The error contains all uncertainties apart from the quenched approximation. Setting the scale with the nucleon mass instead leads to an decrease of 20(1) MeV of the leptonic decay constant.
ISSN:0370-2693
1873-2445
DOI:10.1016/S0370-2693(03)00381-2