2006/10/31 by The BES Collaboration, J.Z. Bai, M. Ablikim +98 · 1 citation
Mathematics · Physics and Astronomy · #Algorithm #High-Energy Particle Collisions Research #Mathematics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.1016/j.physletb.2007.02.029
published as Phys.Lett.B648:149-155,2007 · 8 pages, 8 figures
arxiv created 2007/01/19 · openalex publication_date 2007/02/21 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
With a sample of 14 × 10 6 ψ ( 2 S ) events collected by the BESII detector at the Beijing Electron Positron Collider (BEPC), the decay channels ψ ( 2 S ) → B 8 B ¯ 8 ( p p ¯ , Λ Λ ¯ , Σ 0 Σ ¯ 0 , Ξ − Ξ ¯ + ) are measured, and their branching ratios are determined to be ( 3.36 ± 0.09 ± 0.25 ) × 10 −4 , ( 3.39 ± 0.20 ± 0.32 ) × 10 −4 , ( 2.35 ± 0.36 ± 0.32 ) × 10 −4 , ( 3.03 ± 0.40 ± 0.32 ) × 10 −4 , respectively. In the decay ψ ( 2 S ) → p p ¯ , the angular distribution parameter α is determined to be 0.85 ± 0.24 ± 0.04 .