2005/02/08 by the BaBar Collaboration, R. Barate, B. Aubert +98 · 6 citations
Physics and Astronomy · #Neutrino Physics Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.1103/physrevlett.94.191802
published as Phys.Rev.Lett.94:191802,2005 · 7 pages, 2 postscript figures, submitted to Phys. Rev. Letters
arxiv created 2005/02/08 · openalex publication_date 2005/05/17 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04
We present measurements of the B\ensuremath→\ensuremathη^\ensuremath'K branching fractions; for B+\ensuremath→\ensuremathη^\ensuremath'K+ we measure also the time-integrated charge asymmetry Ach, and for B0\ensuremath→\ensuremathη^\ensuremath'KS0 the time-dependent CP-violation parameters S and C. The data sample corresponds to 232\ifmmode×\else\texttimes\fi106 BB pairs produced by e+e^\ensuremath- annihilation at the \ensuremathΥ(4S). The results are B(B\ensuremath→\ensuremathη^\ensuremath'K+)=(68.9\ifmmode±\else\textpm\fi2.0\ifmmode±\else\textpm\fi3.2)\ifmmode×\else\texttimes\fi10^\ensuremath-6, B(B0\ensuremath→\ensuremathη^\ensuremath'K0)=(67.4\ifmmode±\else\textpm\fi3.3\ifmmode±\else\textpm\fi3.2)\ifmmode×\else\texttimes\fi10^\ensuremath-6, Ach=0.033\ifmmode±\else\textpm\fi0.028\ifmmode±\else\textpm\fi0.005, S=0.30\ifmmode±\else\textpm\fi0.14\ifmmode±\else\textpm\fi0.02, and C=\ensuremath-0.21\ifmmode±\else\textpm\fi0.10\ifmmode±\else\textpm\fi0.02, where the first error quoted is statistical and the second is systematic.