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Measurements of the branching fractions for psi(3770)-->D(0)D[over ](0), D+D-, DD[over ], and the resonance parameters of psi(3770) and psi(2S) |
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| Authors: | Ablikim M Bai J Z Ban Y Bian J G Cai X Chen H F Chen H S Chen H X Chen J C Chen Jin Chen Y B Chi S P Chu Y P Cui X Z Dai Y S Deng Z Y Dong L Y Dong Q F Du S X Du Z Z Fang J Fang S S Fu C D Gao C S Gao Y N Gu S D Gu Y T Guo Y N Guo Y Q He K L He M Heng Y K Hu H M Hu T Huang X P Huang X T Ji X B Jiang X S Jiao J B Jin D P Jin S Jin Yi Lai Y F Li G Li H B Li H H Li J Li R Y Li S M Li W D Li W G Li X L Li X Q Li Y L Liang Y F Liao H B Liu C X Liu F Liu Fang Liu H H Liu H M Liu J Liu J B Liu J P Liu R G Liu Z A Lu F Lu G R Lu H J Lu J G Luo C L Ma F C Ma H L Ma L L Ma Q M Ma X B Mao Z P Mo X H |
| Institution: | Institute of High Energy Physics, Beijing 100049, People's Republic of China. |
| Abstract: | We measure the branching fractions for psi(3770)-->D(0)Dover ](0), D+D-, DDover ], and non-DDover ] to be (46.7+/-4.7+/-2.3)%, (36.9+/-3.7+/-2.8)%, (83.6+/-7.3+/-4.2)%, and (16.4+/-7.3+/-4.2)%, respectively. The resonance parameters of psi(3770) and psi(2S) are measured to be M_(psi(3770))=3772.2+/-0.7+/-0.3 MeV, Gamma_(psi(3770))(tot)=26.9+/-2.4+/-0.3 MeV, and Gamma_(psi(3770))(ee)=251+/-26+/-11 eV; M_(psi(2S))=3685.5+/-0.0+/-0.3 MeV, Gamma_(psi(2S))(tot)=331+/-58+/-2 keV, and Gamma_(psi(2S))(ee)=2.330+/-0.036+/-0.110 keV. We also measure the light hadron R value to be R(uds)=2.262+/-0.054+/-0.109 in the energy region from 3.660 to 3.872 GeV. |
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