2003/06/30 by Andreas Juttner, Juri Rolf
Physics and Astronomy · #hep-ph #hep-lat
published as eConf C0304052 (2003) WG508 · Invited talk at the Workshop on the CKM Unitarity Triangle, IPPP Durham, April 2003 (eConf C0304052). 4 pages LaTeX, 2 eps figures
arxiv created 2003/06/30 · arxiv updated 2009/11/30
We summarize a computation of the leptonic decay constant fDs of the Ds-meson in quenched QCD on the lattice. We perform a direct simulation at the masses of the strange and the charm quarks at four different lattice spacings from approximately 0.1 fm to 0.05 fm. Fully non perturbative O(a)-improvement is employed. After taking the continuum limit we arrive at a value of fDs=252(9) MeV, when setting the scale with the Kaon decay constant fK=160 MeV. Setting the scale with the nucleon mass instead leads to a decrease of about 20 MeV of fDs.