2008/11/30 by D0 Collaboration, B. Abbott, V. M. Abazov +98
Physics and Astronomy · #Algorithm #Branching fraction #Collider #Collider Detector at Fermilab #Computer science #Fermilab #High-Energy Particle Collisions Research #Large Hadron Collider #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Tevatron #hep-ex
paper · pdf · doi:10.1103/physrevlett.102.091801
published as Phys.Rev.Lett.102:091801,2009 · submitted to Phys. Rev. Lett
arxiv created 2009/02/04 · openalex publication_date 2009/03/03 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We search for the semi-inclusive process Bs0\ensuremath→Ds(*)Ds(*) using 2.8 fb^\ensuremath-1 of pp collisions at √(s)=1.96 TeV recorded by the D0 detector operating at the Fermilab Tevatron Collider. We observe 26.6\ifmmode±\else\textpm\fi8.4 signal events with a significance above background of 3.2 standard deviations yielding a branching ratio of B(Bs0\ensuremath→Ds(*)Ds(*))=0.035\ifmmode±\else\textpm\fi0.010(stat.)\ifmmode±\else\textpm\fi0.011(syst.). Under certain theoretical assumptions, these double-charm final states saturate CP-even eigenstates in the Bs0 decays resulting in a width difference of \ensuremathΔ\ensuremathΓsCP/\ensuremathΓs=0.072\ifmmode±\else\textpm\fi0.021(stat.)\ifmmode±\else\textpm\fi0.022(syst.).