B→（J/ψ,η_c）K decays in the perturbative QCD approach

• Published in: Chinese physics C no. 7; pp. 937 - 943
• Main Author: 刘新 张志清 肖振军
• Format: Journal Article
• Language: English
• Published: 2010
• Subjects: CP破坏; J/ψ; NLO; 因式分解; 微扰QCD; 非线性光学
• ISSN: 1674-1137; 0254-3052

In this paper,we calculated the B →（J/ψ,ηc） K decays in the perturbative QCD（pQCD） factorization approach with the inclusion of the partial next-to-leading order（NLO） contributions. With the inclusion of the significant enhancement from the NLO vertex corrections,the NLO pQCD predictions for the branching ratios agree with the data within 2σ errors：Br（B0 → J/ψK0） = 5.2-＋32..58×10-4,Br（B＋ → J/ψK＋） = 5.6-＋32..79×10-4,Br（B0 →ηcK0） = 5.5-＋22..30 × 10-4,Br（B＋ →ηcK＋） = 5.9-＋22..51 × 10-4.