2004/06/01 by KTeV Collaboration, W. To, T. Alexopoulos +56 · 58 citations
Mathematics · Physics and Astronomy · #Combinatorics #High-Energy Particle Collisions Research #Mathematics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.1103/physrevd.70.092006
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 70(9) (American Physical Society) · Submitted to Phys. Rev. D; 20 pages, 22 figures
arxiv created 2004/06/01 · openalex publication_date 2004/11/16 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present new measurements of the six largest branching fractions of the KL using data collected in 1997 by the KTeV experiment (E832) at Fermilab. The results are B(KL\ensuremath→\ensuremathπ^\ifmmode±\else\textpm\fie^\ensuremath∓\ensuremathν)=0.4067\ifmmode±\else\textpm\fi0.0011, B(KL\ensuremath→\ensuremathπ^\ifmmode±\else\textpm\fi\ensuremathμ^\ensuremath∓\ensuremathν)=0.2701\ifmmode±\else\textpm\fi0.0009, B(KL\ensuremath→\ensuremathπ+\ensuremathπ^\ensuremath-\ensuremathπ0)=0.1252\ifmmode±\else\textpm\fi0.0007, B(KL\ensuremath→\ensuremathπ0\ensuremathπ0\ensuremathπ0)=0.1945\ifmmode±\else\textpm\fi0.0018, B(KL\ensuremath→\ensuremathπ+\ensuremathπ^\ensuremath-)=(1.975\ifmmode±\else\textpm\fi0.012)\ifmmode×\else\texttimes\fi10^\ensuremath-3, and B(KL\ensuremath→\ensuremathπ0\ensuremathπ0)=(0.865\ifmmode±\else\textpm\fi0.010)\ifmmode×\else\texttimes\fi10^\ensuremath-3, where statistical and systematic errors have been summed in quadrature. We also determine the CP violation parameter |\ensuremathη_+\ensuremath-| to be (2.228\ifmmode±\else\textpm\fi0.010)\ifmmode×\else\texttimes\fi10^\ensuremath-3. Several of these results are not in good agreement with averages of previous measurements.