2003/03/31 by The BABAR Collaboration, R. Barate, B. Aubert +98 · 1 citation
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.91.161801
published as Phys.Rev.Lett.91:161801,2003 · 7 pages, 2 postscript figues, resubmitted Phys. Rev. Letters in response to review. Revised K0s reconstruction efficiency calculation resulting in ~10% upward revision of the value of B(B0->eta'K0) (and downward shift of the charged/neutral ratio of decay rates); minor revision of systematic on C
arxiv created 2003/08/16 · openalex publication_date 2003/10/13 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04
We present measurements of the branching fractions of the decays B+\ensuremath→\mathrm\ensuremathη^\mathrm\ensuremath'K+ and B0\ensuremath→\mathrm\ensuremathη^\mathrm\ensuremath'K0. For B0\ensuremath→\mathrm\ensuremathη^\mathrm\ensuremath'KS0 we also measure the time-dependent CP-violation parameters S_\mathrm\ensuremathη^\mathrm\ensuremath'KS0 and C_\mathrm\ensuremathη^\mathrm\ensuremath'KS0, and for B+\ensuremath→\mathrm\ensuremathη^\mathrm\ensuremath'K+ the time-integrated charge asymmetry Ach. The data sample corresponds to 88.9\ifmmode×\else\texttimes\fi106 BB pairs produced by e+e^\ensuremath- annihilation at the \ensuremathΥ(4S). The results are B(B+\ensuremath→\mathrm\ensuremathη^\mathrm\ensuremath'K+)=(76.9\ifmmode±\else\textpm\fi3.5\ifmmode±\else\textpm\fi4.4)\ifmmode×\else\texttimes\fi10^\ensuremath-6, B(B0\ensuremath→\mathrm\ensuremathη^\mathrm\ensuremath'K0)=(60.6\ifmmode±\else\textpm\fi5.6\ifmmode±\else\textpm\fi4.6)\ifmmode×\else\texttimes\fi10^\ensuremath-6, S_\mathrm\ensuremathη^\mathrm\ensuremath'KS0=0.02\ifmmode±\else\textpm\fi0.34\ifmmode±\else\textpm\fi0.03, C_\mathrm\ensuremathη^\mathrm\ensuremath'KS0=0.10\ifmmode±\else\textpm\fi0.22\ifmmode±\else\textpm\fi0.04, and Ach=0.037\ifmmode±\else\textpm\fi0.045\ifmmode±\else\textpm\fi0.011.