2014/07/07 by G. Aad, ATLAS Collaboration, T. Abajyan +98 · 1 citation
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paper · pdf · doi:10.1103/physrevd.90.052007
published as Phys. Rev. D 90, 052007 (2014) · 26 pages plus author list + cover pages (54 pages total), 9 figures, 7 tables, submitted to PRD, All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/BPHY-2013-01/
arxiv created 2014/07/07 · openalex publication_date 2014/09/23 · arxiv updated 2014/10/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
A measurement of the Bs0\ensuremath→J/\ensuremathψ\ensuremathφ decay parameters, updated to include flavor tagging is reported using 4.9 fb^\ensuremath-1 of integrated luminosity collected by the ATLAS detector from √(s)=7 TeV pp collisions recorded in 2011 at the LHC. The values measured for the physical parameters are \ensuremathφs=0.12\ifmmode±\else\textpm\fi0.25(stat)\ifmmode±\else\textpm\fi0.05(syst) rad\phantom\rule0ex0ex\mathrm\ensuremathΔ\mathrm\ensuremathΓs=0.053\ifmmode±\else\textpm\fi0.021(stat)\ifmmode±\else\textpm\fi0.010(syst) ps^\ensuremath-1\phantom\rule0ex0ex\mathrm\ensuremathΓs=0.677\ifmmode±\else\textpm\fi0.007(stat)\ifmmode±\else\textpm\fi0.004(syst) ps^\ensuremath-1\phantom\rule0ex0ex|A_\ensuremath∥(0)|2=0.220\ifmmode±\else\textpm\fi0.008(stat)\ifmmode±\else\textpm\fi0.009(syst)\phantom\rule0ex0ex|A0(0)|2=0.529\ifmmode±\else\textpm\fi0.006(stat)\ifmmode±\else\textpm\fi0.012(syst)\phantom\rule0ex0ex\ensuremathδ_\ensuremath⊥=3.89\ifmmode±\else\textpm\fi0.47(stat)\ifmmode±\else\textpm\fi0.11(syst) radwhere the parameter \mathrm\ensuremathΔ\mathrm\ensuremathΓs is constrained to be positive. The S-wave contribution was measured and found to be compatible with zero. Results for \ensuremathφs and \mathrm\ensuremathΔ\mathrm\ensuremathΓs are also presented as 68% and 95% likelihood contours, which show agreement with the Standard Model expectations.