Mixing in the D0 - D0bar system at BaBar

Details Mixing in the D0 - D0bar system at BaBar Mixing in the D0 - D0bar system at BaBar

2002-10-25

arxiv.org/abs/hep-ex/0210060v1

Frascati Phys.Ser. 31 (2003) 239-243

Physics

High Energy Physics

High Energy Physics - Experiment

5 pages, 2 postscript figues, contributed to the proceedings of the Frontier Science 2002 conference

Scientific paper

We report a preliminary result for D0-D0bar mixing and the doubly Cabibbo suppressed decay rate R_D based on an analysis of D0 -> K+ pi- decays from 57.1 inverse fb of data collected at or just below the Y(4S) resonance with the BaBar detector at the PEP-II collider. We set 95% confidence limits for the mixing parameters x'^2 and y' and find that our result is compatible with no mixing and no CP violation. In the limit of no mixing we find the doubly Cabibbo suppressed decay rate R_D = (0.357 +- 0.022 (stat.) +- 0.027 (syst.))% and the CP violating asymmetry A_D = 0.095 +- 0.061 (stat.) +- 0.083 (syst.).

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