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共振态J/ψ,ψ(2S)与ψ(3770)通过虚光子衰变的强子过程(英文)

Hadronic Decays of J/ψ,ψ(2S) and ψ(3770)Through Virtual Photon
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摘要 根据BES合作组关于R值的最新测量结果,给出了J/ψ,ψ(2S)和ψ(3 770)介子通过虚光子衰变的强子过程的分支比的一个简单计算.首次计算出(J/ψ→γ~*→hadrons)=(12.91±0.14)%和B(ψ(2S)→γ~*→handrons)=(1.68±0.04)%,和B(ψ(3 770)→γ~*→handrons)=(2.11±0.15)×10^(-5),同时也是目前与实验吻合最好的结果. Based on the latest R measurements from the BES Collaboration, we give a simple calculation for the branching fractions of the hadron production via virtual photon of J/ψ,ψ(2S), and ψ(3770)mesons. The current best results are B(J/ψ→γ^*→hadron)= (12.91±0.14) % and B(ψ(2S) →γ^*→hadron)- (1.68±0. 04) , and B(ψ(3 770)→γ^*→hadron) = (2.11±0.15)×10^-5 is presented for the first time.
出处 《南开大学学报(自然科学版)》 CAS CSCD 北大核心 2015年第2期110-112,共3页 Acta Scientiarum Naturalium Universitatis Nankaiensis
基金 Supported by the National Natural Science Foundation of China(11099023,11005061,10835001)
关键词 R值 粲夸克态 虚光子 R value charmonium virtual photon
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