Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2005-12-16
Phys.Rev.Lett.96:092002,2006; Erratum-ibid.104:159901,2010
Physics
High Energy Physics
High Energy Physics - Experiment
9 pages postscript,also available through http://www.lns.cornell.edu/public/CLNS/2005/, Submitted to PRL
Scientific paper
10.1103/PhysRevLett.96.092002
We measure the cross section for e^+e^- -> \psi(3770) -> hadrons at Ecm=3773 MeV to be (6.38+-0.08^{+0.41}_{-0.30}) nb using the CLEO detector at the CESR e^+e^- collider. The difference between this and the e^+e^- -> \psi(3770) -> DD-bar cross section at the same energy is found to be (-0.01+-0.08^{+0.41}_{-0.30}) nb. With the observed total cross section, we extract \Gamma_ee(\psi(3770))=(0.204+-0.003^{+0.041}_{-0.027}) keV. Uncertainties shown are statistical and systematic, respectively.
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