A Precision Determination of the D0 Mass
Abstract
A precision measurement of the D0 meson mass has been made using ~281 pb-1 of e+e- annihilation data taken with the CLEO-c detector at the psi(3770) resonance. The exclusive decay D0 -> (Ks phi) has been used to obtain M(D0)=1864.847+-0.150(stat)+-0.095(syst) MeV. This corresponds to M(D0 D*0)=3871.81+-0.36 MeV, and leads to a well-constrained determination of the binding energy of the proposed (D0 D*0) molecule X(3872), Eb=0.6+-0.6 MeV.
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