Direct Measurement of the Branching Fractions B(ψ(3686) → J/ψX) and B(ψ(3770) → J/ψX), and Observation of the State R(3760) in e+e- → J/ψX
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- 刊物名稱:PHYSICAL REVIEW LETTERS
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- 作者:Ablikim, M; Achasov, MN; Adlarson, P et al. (BESIII Collaboration)
- 發(fā)表年度:2021
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