A precision measurement of the D^0 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 D^0 -> (Ks phi) has been used to obtain M(D^0)=1864.847+-0.150(stat)+-0.095(syst) MeV. This corresponds to M(D^0 D^*0)=3871.81+-0.36 MeV, and leads to a well-constrained determination of the binding energy of the proposed (D^0 D^*0) molecule X(3872), E_b=0.6+-0.6 MeV.
@article{arxiv.hep-ex/0701016,
title = {A Precision Determination of the D^0 Mass},
author = {C. Cawlfield and CLEO Collaboration},
journal= {arXiv preprint arXiv:hep-ex/0701016},
year = {2010}
}
Comments
8 pages postscript,also available through http://www.lns.cornell.edu/public/CLNS/2006/, Submitted to PRL