Physics – High Energy Physics
Scientific paper
Apr 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005iche.conf.1200r&link_type=abstract
HIGH ENERGY PHYSICS, ICHEP 2004. Proceedings of the 32nd International Conference. Held 16-22 August 2004 in Beijing, China. Edi
Physics
High Energy Physics
Scientific paper
The ψ(3770) resonance parameters and the averaged light hadron bar {R}uds value are measured from analysis of the data taken from 3.666 GeV to 3.897 GeV using the BES-II detector at the BEPC. The cross sections for D0bar {D}^0 and D+ D- production at 3.773 GeV are measured from analyzing a data sample of 17.3 ± 0.5 pb-1 collected at 3.773 GeV. A total of 11.8 ± 5.0 ψ(3770) → J/ψπ+π- events are observed from a data sample of about 28 pb-1 taken around 3.773 GeV. The branching fraction is determined to be BF(ψ(3770) → J/ψπ+π-) = (0.34 ± 0.14 ± 0.09)%, corresponding to the partial width of Γ(ψ(3770) → J/ψπ+π-) = (80 ± 33 ± 23) keV. The charmless final states of ψ (3770) -> K*bar {K} + c.c. are searched and the upper limit on the decay branching fraction is set to be BF(ψ (3770) -> K*bar {K}^0 + c.c.) < 0.12%. at 90% CL.
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