Search for D0D¯0 mixing using doubly flavor tagged semileptonic decay modes

B. Aubert et al. (BABAR Collaboration)
Phys. Rev. D 76, 014018 – Published 31 July 2007

Abstract

We have searched for D0D¯0 mixing in D*+π+D0 decays with D0K(*)eν in a sample of e+ecc¯ 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 0.4×104. Using a frequentist method, we set corresponding 68% and 90% confidence intervals at (5.6,7.4)×104 and (13,12)×104, respectively.

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  • Received 9 May 2007

DOI:https://doi.org/10.1103/PhysRevD.76.014018

©2007 American Physical Society

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Vol. 76, Iss. 1 — 1 July 2007

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