2004/08/31 by BaBar Collaboration, B. Aubert, R. Barate +98 · 1 citation
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Particle Detector Development and Performance #Particle physics theoretical and experimental studies #hep-ex
paper · pdf · doi:10.1103/physrevlett.93.191801
published as Phys.Rev.Lett.93:191801,2004 · Minor changes of the text and reference for the publication
arxiv created 2004/11/04 · openalex publication_date 2004/11/04 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04
We report on a search for the flavor-changing neutral current decays D0\ensuremath→e+e^\ensuremath- and D0\ensuremath→\ensuremathμ+\ensuremathμ^\ensuremath-, and the lepton-flavor violating decay D0\ensuremath→e^\ifmmode±\else\textpm\fi\ensuremathμ^\ensuremath∓. The measurement is based on 122 fb^\ensuremath-1 of data collected by the BABAR detector at the SLAC PEP-II asymmetric e+e^\ensuremath- collider. No evidence is found for any of the decays. The upper limits on the branching fractions, at the 90% confidence level, are 1.2\ifmmode×\else\texttimes\fi10^\ensuremath-6 for D0\ensuremath→e+e^\ensuremath-, 1.3\ifmmode×\else\texttimes\fi10^\ensuremath-6 for D0\ensuremath→\ensuremathμ+\ensuremathμ^\ensuremath-, and 8.1\ifmmode×\else\texttimes\fi10^\ensuremath-7 for D0\ensuremath→e^\ifmmode±\else\textpm\fi\ensuremathμ^\ensuremath∓.