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Measurement ofD0−D¯0Mixing from a Time-Dependent Amplitude Analysis ofD0→K+π−π0Decays

Journal article published in 2009 by B. Aubert, M. Bona ORCID, Y. Karyotakis, J. P. Lees, V. Poireau, E. Prencipe, X. Prudent, V. Tisserand, J. Garra Tico, E. Grauges, L. Lopez, A. Palano, M. Pappagallo, G. Eigen, B. Stugu and other authors.
This paper is available in a repository.
This paper is available in a repository.

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Abstract

We present evidence of D[superscript 0]-D̅[superscript 0] mixing using a time-dependent amplitude analysis of the decay D0→K[superscript +]π[superscript -]π[superscript 0] in a data sample of 384  fb[superscript -1] collected with the BABAR detector at the PEP-II e[superscript +]e[superscript -] collider at the Stanford Linear Accelerator Center. Assuming CP conservation, we measure the mixing parameters x[subscript Kππ][superscript 0′]=[2.61[subscript -0.68] [superscript +0.57](stat)±0.39(syst)]%, y[subscript Kππ][superscript 0′]=[-0.06[subscript -0.64][superscript +0.55](stat)±0.34(syst)]%. This result is inconsistent with the no-mixing hypothesis with a significance of 3.2 standard deviations. We find no evidence of CP violation in mixing. Science and Technology Facilities Council, United Kingdom MEC (Spain) MES (Russia) NFR (Norway) FOM of the Netherlands Istituto Nazionale di Fisica Nucleare of Italy DFG (Germany) Bundesministerium für Bildung und Forschung, Germany CNRS-IN2P3 (France) CEA (France) Natural Sciences and Engineering Research Council of Canada National Science Foundation Department of Energy