Search for CP violation in the decays D0→K-K+ and D0→π-π+

Bernard Aubert,Marcella Bona, D. Boutigny,Y. Karyotakis,J. P. Lees,V. Poireau, X. Prudent,V. Tisserand,Amina Zghiche,J. Garra Tico,E. Grauges,L. Lopez,A. Palano,M. Pappagallo,G. Eigen,B. Stugu, L. Sun,G. S. Abrams,M. Battaglia,D. N. Brown,Janice Button-Shafer,R. N. Cahn,Y. Groysman,R. G. Jacobsen,J. A. Kadyk,L. T. Kerth,Yu. G. Kolomensky, G. Kukartsev,D. Lopes Pegna, G. Lynch,L. M. Mir,T. J. Orimoto, I. L. Osipenkov,M. T. Ronan,K. Tackmann,T. Tanabe,W. A. Wenzel,P. del Amo Sanchez,C. M. Hawkes,A. T. Watson,Herbert Koch,T. Schroeder,D. Walker,D. J. Asgeirsson, T. Cuhadar-Donszelmann,B. G. Fulsom,C. Hearty,T. S. Mattison,J. A. McKenna,M. Barrett,Akram Khan,M. Saleem,Liliana Teodorescu,V. E. Blinov,A. D. Bukin,V. P. Druzhinin,V. B. Golubev,A. P. Onuchin,S. I. Serednyakov,Yu 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. D. Buchanan,S. D. Foulkes,J. W. Gary,F. Liu,Owen Rosser Long,B. C. Shen,G. M. Vitug,L.M. Zhang,H. P. Paar,Sh. Rahatlou,Vivek Sharma,J. W. Berryhill,Claudio Campagnari,A. Cunha, B. Dahmes,T. M. Hong,Dmytro Kovalskyi,J. D. Richman,T. W. Beck,A. M. Eisner,C. J. Flacco,C. A. Heusch, J. Kroseberg,W. S. Lockman,T. Schalk,Bruce Schumm,A. Seiden,M. G. Wilson

Physical Review Letters（2008）

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摘要

We measure time-integrated CP-violating asymmetries of neutral charmed mesons in the modes D0 --> K(-) K(+) and D0 --> pi(-) pi(+) with the highest precision to date by using D0 --> K(-) pi(+) decays to correct detector asymmetries. An analysis of 385.8 fb(-1) of data collected with the BABAR detector yields values of a(CP)(KK)=(0.00+/-0.34(stat)+/-0.13(syst))% and a(CP)(pipi)=(-0.24+/-0.52(stat)+/-0.22(syst))%, which agree with standard model predictions.

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