2012/02/29 by J. Li, Jin Li, I. Adachi +98
Chemistry · Physics and Astronomy · #Analytical Chemistry (journal) #Bar (unit) #Branching fraction #Chemistry #Collider #Electron–positron annihilation #Hadron #High-Energy Particle Collisions Research #KEKB #Nuclear physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.1103/physrevlett.108.181808
published as Phys. Rev. Lett. 108, 181808 (2012) · 5 pages, 3 figures, 2 tables
openalex publication_date 2012/05/03 · arxiv created 2012/05/13 · openalex created_date 2016/06/24 · arxiv updated 2019/08/13 · openalex updated_date 2026/08/05
We report first observations of Bs0\ensuremath→J/\ensuremathψ\ensuremathη and Bs0\ensuremath→J/\ensuremathψ\ensuremathη^\ensuremath'. The results are obtained from 121.4 fb^\ensuremath-1 of data collected at the \ensuremathΥ(5S) resonance with the Belle detector at the KEKB e+e^\ensuremath- collider. We obtain the branching fractions B(Bs0\ensuremath→J/\ensuremathψ\ensuremathη)=[5.10\ifmmode±\else\textpm\fi0.50(stat)\ifmmode±\else\textpm\fi0.25(syst)_\ensuremath-0.79+1.14(N_Bs(*)Bs(*))]\ifmmode×\else\texttimes\fi10^\ensuremath-4, and B(Bs0\ensuremath→J/\ensuremathψ\ensuremathη^\ensuremath')=[3.71\ifmmode±\else\textpm\fi0.61(stat)\ifmmode±\else\textpm\fi0.18(syst)_\ensuremath-0.57+0.83(N_Bs(*)Bs(*))]\ifmmode×\else\texttimes\fi10^\ensuremath-4. The ratio of the two branching fractions is measured to be \fracB(Bs\ensuremath→J/\ensuremathψ\ensuremathη^\ensuremath')B(Bs\ensuremath→J/\ensuremathψ\ensuremathη)=0.73\ifmmode±\else\textpm\fi0.14(stat)\ifmmode±\else\textpm\fi0.02(syst).