Ablikim, M.Achasov, M.N.Adlarson, P.Çetin, Serkant AliKolcu, Onur Buğra2025-04-182025-04-182024Kalantar-Nayestanaki, N., Kavatsyuk, M., Messchendorp, J., & BESIII Collaboration. (2024). Precision measurement of the branching fraction of 𝐽/𝜓→ 𝐾+⁢ 𝐾− via 𝜓⁡(2⁢ 𝑆)→ 𝜋+⁢ 𝜋−⁢ 𝐽/𝜓. Physical Review D, 110(3), 032006.24700010http://dx.doi.org/10.1103/PhysRevD.110.032006https://hdl.handle.net/20.500.12713/7181Using a sample of 448.1×106 ψ(2S) events collected with the BESIII detector, we perform a study of the decay J/ψ→K+K- via ψ(2S)→π+π-J/ψ. The branching fraction of J/ψ→K+K- is determined to be BK+K-=(3.072±0.023(stat)±0.050(syst))×10-4, which is consistent with previous measurements but with significantly improved precision.eninfo:eu-repo/semantics/openAccessArticle1103111WOS:00138182890000110.1103/PhysRevD.110.032006Q110.1103/PhysRevD.110.032006Q1