Measurement Of D-0-D-0 Mixing From A Time-Dependent Amplitude Analysis Of D-0 -> K+Pi(-)Pi(0) Decays

B. Aubert,M. Bona,Y. Karyotakis,J. P. Lees,V. Poireau,E. Prencipe, X. Prudent,V. Tisserand,J. Garra Tico,E. Grauges,L. Lopezab,A. Palanoab,M. Pappagalloab,G. Eigen, B. Stugu, L. Sun,G. S. Abrams,M. Battaglia,D. N. Brown,R. N. Cahn,R. G. Jacobsen,L. T. Kerth,G. Kolomensky, G. Lynch,I. L. Osipenkov,M. T. Ronan, K. Tackmann, T. Tanabe,C. M. Hawkes,N. Soni,A. T. Watson,H. Koch,T. Schroeder,D. Walker,D. J. Asgeirsson,B. G. Fulsom, C. Hearty,T. S. Mattison,J. A. McKenna,M. Barrett,A. Khan,V. E. Blinov,A. D. Bukin,A. R. Buzykaev,V. P. Druzhinin,V. B. Golubev,A. P. Onuchin,S. I. Serednyakov,I. Skovpen,E. P. Solodov,K. Yu. Todyshev,M. Bondioli,S. Curry, I. Eschrich,D. Kirkby, A. J. Lankford,P. Lund,M. Mandelkern,E. C. Martin,D. P. Stoker,S. Abachi,C. Buchanan,J. W. Gary,F. Liu,B. C. Shen,G. M. Vitug,Z. Yasin, L. Zhang,V. Sharma,C. Campagnari, T. M. Hong, D. Kovalskyi,M. A. Mazur, J. D. Richman,T. W. Beck,A. M. Eisner,C. J. Flacco,C. A. Heusch, J. Kroseberg, W. S. Lockman,T. Schalk, A. 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PHYSICAL REVIEW LETTERS（2009）

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摘要

We present evidence of D-0-D-0 mixing using a time-dependent amplitude analysis of the decay D-0 -> K+pi(-)pi(0) in a data sample of 384 fb(-1) collected with the BABAR detector at the PEP-II e(+)e(-) collider at the Stanford Linear Accelerator Center. Assuming CP conservation, we measure the mixing parameters x(K pi pi)(0')=[2.61(-0.68)(+0.57)(stat)+/- 0.39(syst)]%, y(K pi pi)(0')=[-0.06(-0.64)(+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.

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