HAL: in2p3-00749283, version 1

arXiv: 1211.1230

DOI: 10.1103/PhysRevLett.110.101802

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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. Ajaltouni3, E. Cogneras3, O. Deschamps3, I. El Rifai3, P. Henrard3, M. Hoballah3, R. Lefèvre3, L. Li Gioi3, S. Monteil3, V. Niess3, P. 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)

(2013)

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-CLERMONT - Laboratoire de Physique Corpusculaire de Clermont-Ferrand
4:	LAPP - Laboratoire d'Annecy le Vieux de Physique des Particules
5:	CPPM - Centre de Physique des Particules de Marseille

Subject(s)

:

Physics/High Energy Physics - Experiment

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From: Françoise Marechal <>

Submitted on: Wednesday, 7 November 2012 11:00:33

Updated on: Monday, 11 March 2013 15:30:34