The recent BES results on R value and high mass charmonia states

Using a data sample with a total integrated luminosity of 9998.3 nb−1 collected at center of mass energies of 2.6, 3.07 and 3.65 GeV with BESII, cross section for e+e− annihilation into hadronic final states (R values) are measured with statistical errors smaller than 1% and systematic errors about 3.5%. The R values measured at center-of-mass energies between 3.7 and 5.0 GeV are fitted to determine the resonance parameters (mass, total width, electron width) of the high mass charmonia states, ψ(3770), ψ(4040), ψ(4160) and ψ(4415).