Evidence for $D^0\bar{D}^0$ Mixing

Evidence for $D^0\bar{D}^0$ Mixing

We present evidence for D0-anti-D0 mixing in D0 --> K+pi- decays from 384 fb^{-1} of e+e- colliding-beam data recorded near sqrt(s) 10.6 GeV with the BaBar detector at the PEP-II storage rings at SLAC. We find the mixing parameters x'^2 = [-0.22 +- 0.30 (stat.) +- 0.21 (syst.)] x 10^{-3} and...

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Veröffentlicht in:Physical review letters 2007, Vol.98
Hauptverfasser: Aubert, B., Bona, M., Boutigny, D., Karyotakis, Y., Lees, J.P., Poireau, V., Prudent, X., Tisserand, V., Zghiche, A., Garra Tico, J., Grauges, E., Lopez, L., Palano, A., Eigen, G., Ofte, I., Stugu, B., Sun, L., Abrams, G.S., Battaglia, M., Brown, D.N., Button-Shafer, J., Cahn, R.N., Groysman, Y., Jacobsen, R.G., Kadyk, J.A., Kerth, L.T., Kolomensky, Yu. G., Kukartsev, G., Lopes Pegna, D., Lynch, G., Mir, L.M., Orimoto, T.J., Pripstein, M., Roe, N.A., Ronan, M.T., Tackmann, K., Wenzel, W.A., del Amo Sanchez, P., Hawkes, C.M., Watson, A.T., Held, T., Koch, H., Lewandowski, B., Pelizaeus, M., Schroeder, T., Steinke, M., Cottingham, W.N., Walker, D., Asgeirsson, D.J., Cuhadar-Donszelmann, T., Fulsom, B.G., Hearty, C., Knecht, N.S., Mattison, T.S., Mckenna, J.A., Khan, A., Saleem, M., Teodorescu, L., Blinov, V.E., Bukin, A.D., Druzhinin, V.P., Golubev, V.B., Onuchin, A.P., Serednyakov, S.I., Skovpen, Yu. I., Solodov, E.P., Todyshev, K. Yu, Bondioli, M., Curry, S., Eschrich, I., Kirkby, D., Lankford, A.J., Lund, P., Mandelkern, M., Martin, E.C., Stoker, D.P., Abachi, S., Buchanan, C., Foulkes, S.D., Gary, J.W., Liu, F., Long, O., Shen, B.C., Zhang, L., Paar, H.P., Rahatlou, S., Sharma, V., Berryhill, J.W., Campagnari, C., Cunha, A., Dahmes, B., Hong, T.M., Kovalskyi, D., Richman, J.D., Beck, T.W., Eisner, A.M., Flacco, C.J., Heusch, C.A., Kroseberg, J., Lockman, W.S.
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Sprache:eng
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High Energy Physics - Experiment
Physics
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Zusammenfassung:We present evidence for D0-anti-D0 mixing in D0 --> K+pi- decays from 384 fb^{-1} of e+e- colliding-beam data recorded near sqrt(s) 10.6 GeV with the BaBar detector at the PEP-II storage rings at SLAC. We find the mixing parameters x'^2 = [-0.22 +- 0.30 (stat.) +- 0.21 (syst.)] x 10^{-3} and y' = [9.7 +- 4.4 (stat.) +- 3.1 (syst.)] x 10^{-3}, and a correlation between them of -0.94. This result is inconsistent with the no-mixing hypothesis with a significance of 3.9 standard deviations. We measure R_D, the ratio of doubly Cabibbo-suppressed to Cabibbo-favored decay rates, to be [0.303 +- 0.016 (stat.) +- 0.010 (syst.)]%. We find no evidence for \CP violation.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.98.211802