Evidence forD0−D¯0Mixing Using the CDF II Detector

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doi:10.1103/physrevlett.100.121802

Abstract

We measure the time dependence of the ratio of decay rates for the rare decay D0→K+π− to the Cabibbo-favored decay D0→K−π+. A signal of 12.7×103 D0→K+π− decays was obtained using the Collider Detector at Fermilab II detector at the Fermilab Tevatron with an integrated luminosity of 1.5 fb−1. We measure the D0−D¯0 mixing parameters (RD,y′,x′2), and find that the data are inconsistent with the no-mixing hypothesis with a probability equivalent to 3.8 Gaussian standard deviations.Received 11 December 2007DOI:https://doi.org/10.1103/PhysRevLett.100.121802©2008 American Physical Society

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