We present results of a search for D0-D̅ 0 mixing and a measurement of RD, the ratio of doubly Cabibbo-suppressed decays to Cabibbo-favored decays, using D0→K+π- decays from 57.1 fb-1 of data collected near √s=10.6 GeV with the BABAR detector at the PEP-II collider. At the 95% confidence level, allowing for CP violation, we find the mixing parameters x′2<0.0022 and -0.056<y′<0.039, and the mixing rate RM<0.16%. In the limit of no mixing, RD=[0.357±0.022(stat)±0.027(syst)]% and the CP-violating asymmetry AD=0.095±0.061(stat)±0.083(syst).
Search for D0-D̅ 0 Mixing and a Measurement of the Doubly Cabibbo-Suppressed Decay Rate in D0→Kπ Decays
MARGONI, MARTINO;SIMONETTO, FRANCO;STROILI, ROBERTO;SIMI, GABRIELE;
2003
Abstract
We present results of a search for D0-D̅ 0 mixing and a measurement of RD, the ratio of doubly Cabibbo-suppressed decays to Cabibbo-favored decays, using D0→K+π- decays from 57.1 fb-1 of data collected near √s=10.6 GeV with the BABAR detector at the PEP-II collider. At the 95% confidence level, allowing for CP violation, we find the mixing parameters x′2<0.0022 and -0.056
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