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Physical Review Letters 110 (2013) 101802
Observation of D0-D0bar oscillations
R. Aaij, S. Barsuk1, O. Callot1, J. He1, B. Jean-Marie1, J. Lefrançois1, F. Machefert1, A. Martin Sanchez1, M. Nicol1, P. Robbe1, M.-H. Schune1, B. Viaud1, I. Videau1, E. Ben-Haim2, M. Benayoun2, P. David2, L. Del Buono2, A. Martens2, Z J Ajaltouni3, E. Cogneras3, O. Deschamps3, I. El Rifai3, P. Henrard3, M. Hoballah3, R. Lefèvre3, L. Li Gioi3, S. Monteil3, V. Niess3, Pascal Perret3, D. Roa Romero3, K. Sobczak3, I. De Bonis4, D. Decamp4, Ph. Ghez4, P. Hopchev4, J.-P. Lees4, M.-N. Minard4, B. Pietrzyk4, W. Qian4, S. T'Jampens4, V. Tisserand4, E. Tournefier4, R. Aaij, C. Adrover5, E. Aslanides5, J. Cogan5, R. Legac5, O. Leroy5, G. Mancinelli5, E. Maurice5, M. Perrin-Terrin5, M. Sapunov5, J. Serrano5, A. Tsaregorodtsev5
For the LHCb collaboration(s)

We report a measurement of the time-dependent ratio of D0->K+pi- to D0->K-pi+ decay rates in D*+-tagged events using 1.0 fb^{-1} of integrated luminosity recorded by the LHCb experiment. We measure the mixing parameters x'2=(-0.9+-1.3)x10^{-4}, y'=(7.2+-2.4)x10^{-3} and the ratio of doubly-Cabibbo-suppressed to Cabibbo-favored decay rates R_D=(3.52+-0.15)x10^{-3}, where the uncertainties include statistical and systematic sources. The result excludes the no-mixing hypothesis with a probability corresponding to 9.1 standard deviations and represents the first observation of D0-D0bar oscillations from a single measurement.
1:  LAL - Laboratoire de l'Accélérateur Linéaire
2:  LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
3:  LPC - Laboratoire de Physique Corpusculaire [Clermont-Ferrand]
4:  LAPP - Laboratoire d'Annecy le Vieux de Physique des Particules
5:  CPPM - Centre de Physique des Particules de Marseille
Physics/High Energy Physics - Experiment
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