Search for D0 - anti-D0 mixing using doubly flavor tagged semileptonic decay modes

The BaBar Collaboration

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    Abstract

    We have searched for D0−¯¯¯D0 mixing in D*+→π+D0 decays with D0→K(*)eν in a sample of e+e−→c¯c events produced near 10.58 GeV. The charge of the slow pion from charged D∗ decay tags the charm flavor at production, and it is required to be consistent with the flavor of a fully reconstructed second charm decay in the same event. We observe 3 mixed candidates compared to 2.85 background events expected from simulation. We ascribe a 50% systematic uncertainty to this expected background rate. We find a central value for the mixing rate of 0.4×10−4. Using a frequentist method, we set corresponding 68% and 90% confidence intervals at (−5.6,7.4)×10−4 and (−13,12)×10−4, respectively.
    Original languageEnglish
    Article number014018
    Number of pages13
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Volume76
    Issue number1
    DOIs
    Publication statusPublished - 2007

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