We measure the cross section for e+e-→ψ(3770)→hadrons at Ec.m.=3773MeV to be (6.38±0.08-0.30+0.41)nb using the CLEO detector at the CESR e+e- collider. The difference between this and the e+e- →ψ(3770)→DD̄ cross section at the same energy is found to be (-0.01±0.08-0.30+0.41)nb. With the observed total cross section, we extract Γee(ψ(3770))=(0.204±0.003-0.027+0.041)keV. Uncertainties shown are statistical and systematic, respectively.
ASJC Scopus subject areas
- Physics and Astronomy(all)