Measurements of D and Ds decay constants at CLEO

Details Measurements of D and Ds decay constants at CLEO Measurements of D and Ds decay constants at CLEO

2008-10-13

arxiv.org/abs/0810.2328v1

Physics

High Energy Physics

High Energy Physics - Experiment

Parallel talk at ICHEP'08, Philadelphia, USA, July 29 - August 5, 2008. 5 pages

Scientific paper

Using CLEO data collected at 3370 MeV and 4170 MeV, we determine fD = (205.8
+- 8.5 +- 2.5) MeV and an interim preliminary value of fDs = (267.9 +- 8.2 +-
3.9) MeV, where both results are radiatively corrected. They agree with the
recent most precise unquenched Lattice-QCD calculation for the D+, but do not
for the Ds. Several consequences are discussed.

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