2006/09/22 by CDF Collaboration, A. Abulencia, J. Adelman +98 · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.1103/physrevlett.97.242003
published as Phys.Rev.Lett.97:242003,2006 · 9 pages, 5 figures, submitted to Physical Review Letters
arxiv created 2006/09/22 · openalex publication_date 2006/12/12 · arxiv updated 2012/08/27 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We report the observation of Bs0\mathrm\text\ensuremath-Bs0 oscillations from a time-dependent measurement of the Bs0\mathrm\text\ensuremath-Bs0 oscillation frequency \ensuremathΔms. Using a data sample of 1 fb^\ensuremath-1 of pp collisions at √(s)=1.96 TeV collected with the CDF II detector at the Fermilab Tevatron, we find signals of 5600 fully reconstructed hadronic Bs decays, 3100 partially reconstructed hadronic Bs decays, and 61 500 partially reconstructed semileptonic Bs decays. We measure the probability as a function of proper decay time that the Bs decays with the same, or opposite, flavor as the flavor at production, and we find a signal for Bs0\mathrm\text\ensuremath-Bs0 oscillations. The probability that random fluctuations could produce a comparable signal is 8\ifmmode×\else\texttimes\fi10^\ensuremath-8, which exceeds 5\ensuremathσ significance. We measure \ensuremathΔms=17.77\ifmmode±\else\textpm\fi0.10(stat)\ifmmode±\else\textpm\fi0.07(syst) ps^\ensuremath-1 and extract |Vtd/Vts|=0.2060\ifmmode±\else\textpm\fi0.0007(\ensuremathΔms)_\ensuremath-0.0060+0.0081(\ensuremathΔmd+theor).