2008/12/22 by CDF Collaboration, J. Adelman, T. Aaltonen +98
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevlett.103.031801
published as Phys.Rev.Lett.103:031801,2009 · Submitted to Phys. Rev. Lett
arxiv created 2008/12/22 · openalex publication_date 2009/07/17 · arxiv updated 2010/05/12 · openalex created_date 2021/04/13 · openalex updated_date 2026/08/03
We search for new charmless decays of neutral b hadrons to pairs of charged hadrons, using 1 fb^\ensuremath-1 of data collected by the CDF II detector at the Fermilab Tevatron. We report the first observation of the Bs0\ensuremath→K^\ensuremath-\ensuremathπ+ decay and measure B(Bs0\ensuremath→K^\ensuremath-\ensuremathπ+)=(5.0\ifmmode±\else\textpm\fi0.7(stat)\ifmmode±\else\textpm\fi0.8(syst))\ifmmode×\else\texttimes\fi10^\ensuremath-6. We also report the first observation of charmless b-baryon decays, and measure B(\ensuremathΛb0\ensuremath→p\ensuremathπ^\ensuremath-)=(3.5\ifmmode±\else\textpm\fi0.6(stat)\ifmmode±\else\textpm\fi0.9(syst))\ifmmode×\else\texttimes\fi10^\ensuremath-6 and B(\ensuremathΛb0\ensuremath→pK^\ensuremath-)=(5.6\ifmmode±\else\textpm\fi0.8(stat)\ifmmode±\else\textpm\fi1.5(syst))\ifmmode×\else\texttimes\fi10^\ensuremath-6. No evidence is found for other modes, and we set the limit B(Bs0\ensuremath→\ensuremathπ+\ensuremathπ^\ensuremath-)<1.2\ifmmode×\else\texttimes\fi10^\ensuremath-6 at 90% C.L.