Observation of the decay B⁺ → ψ(2S)ϕ(1020)K⁺ in pp collisions at

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• 作者：The CMS Collaboration^⋆ ; V. Khachatryan ; A.M. Sirunyan ; A. Tumasyan
• 关键词：CMS ; Physics ; B physics ; Rare B decays
• 刊名：Physics Letters B
• 出版年：2017
• 出版时间：10 January 2017
• 年：2017
• 卷：764
• 期：Complete
• 页码：66-86
• 全文大小：916 K
• 卷排序：764

文摘

The decay B+→ψ(2S)ϕ(1020)K+B+→ψ(2S)ϕ(1020)K+ is observed for the first time using data collected from pp collisions at s=8TeV by the CMS experiment at the LHC, corresponding to an integrated luminosity of 19.6fb−1. The branching fraction of this decay is measured, using the mode B+→ψ(2S)K+B+→ψ(2S)K+ as normalization, to be (4.0±0.4(stat)±0.6(syst)±0.2(B))×10−6, where the third uncertainty is from the measured branching fraction of the normalization channel.