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, Nie J, Peng H P, Qi N D, Qin H, Qiu J F, Ren Z Y, Rong G, Shan L Y, Shang L, Shen D L, Shen X Y, Sheng H Y, Shi F, Shi X, Sun H S, Sun J F, Sun S S, Sun Y Z, Sun Z J, Tan Z Q, Tang X, Tian Y R, Tong G L, Wang D Y, Wang L, Wang L S, Wang M, Wang P, Wang P L, Wang W F, Wang Y F, Wang Z, Wang Z Y, Wang Zhe, Wang Zheng, Wei C L, Wei D H, Wu N, Xia X M, Xie X X, Xin B, Xu G F, Xu Y, Yan M L, Yang F, Yang H X, Yang J, Yang Y X, Ye M H, Ye Y X, Yi Z Y, Yu G W, Yuan C Z, Yuan J M, Yuan Y, Zang S L, Zeng Y, Zeng Yu, Zhang B X, Zhang B Y, Zhang C C, Zhang D H, Zhang H Y, Zhang J W, Zhang J Y, Zhang Q J, Zhang X M, Zhang X Y, Zhang Yiyun, Zhang Z P, Zhang Z Q, Zhao D X, Zhao J W, Zhao M G, Zhao P P, Zhao W R, Zheng H Q, Zheng J P, Zheng Z P, Zhou L, Zhou N F, Zhu K J, Zhu Q M, Zhu Y C, Zhu Y S, Zhu Yingchun, Zhu Z A, Zhuang B A, Zhuang X A, Zou B S
Institute of High Energy Physics, Beijing 100049, People's Republic of China.
Phys Rev Lett. 2006 Sep 22;97(12):121801. doi: 10.1103/PhysRevLett.97.121801. Epub 2006 Sep 18.
We measure the branching fractions for psi(3770)-->D(0)Dover , D+D-, DD[over ], and non-DD[over ] 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.
我们测得ψ(3770)→D⁰D⁰、D⁺D⁻、DD⁻和非DD⁻的分支比分别为(46.7±4.7±2.3)%、(36.9±3.7±2.8)%、(83.6±7.3±4.2)%和(16.4±7.3±4.2)%。测得ψ(3770)和ψ(2S)的共振参数为：M₍ψ(3770)₎ = 3772.2±0.7±0.3兆电子伏特，Γ₍ψ(3770)₎(总) = 26.9±2.4±0.3兆电子伏特，以及Γ₍ψ(3770)₎(ee) = 251±26±11电子伏特；M₍ψ(2S)₎ = 3685.5±0.0±0.3兆电子伏特，Γ₍ψ(2S)₎(总) = 331±58±2千电子伏特，以及Γ₍ψ(2S)₎(ee) = 2.330±0.036±0.110千电子伏特。我们还测得在3.660至3.872吉电子伏特的能量区域内，轻强子R值为R(uds) = 2.262±0.054±0.109 。
