Charm Physics at CLEO-c

The latest results are presented from CLEO-c on W annihilation decays of the D+ and mesons. This includes the decay constants and the first observation of the decay . Presented here is the final result for the D+ from the complete data set of 818 pb−1 and an updated result for the from 400 pb−1 of the total data set of 600 pb−1 The final result is fD+=(205.8±8.5±2.5)MeV, and the preliminary value for the is , where both results are radiatively corrected. The recent most precise unquenched Lattice-QCD calculation for the D+ agree with this result but are in disagreement with the . Using almost identical analysis techniques the decay has been observed with a branching fraction .