Measurement of CP asymmetry in B(0) -> K(s)(0)pi(0)pi(0) decays

B. Aubert,Marcella Bona, D. Boutigny,Y. Karyotakis, J. P. Lees,V. Poireau, X. Prudent,V. Tisserand,Amina Zghiche,E. Grauges, A. Palano,J. C. Chen, N. D. Qi, G. Rong, Pu Wang, Y. S. Zhu,G. Eigen, I. Ofte,B. Stugu, 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, M. Pripstein, N. A. Roe, M. T. Ronan, Kerstin Tackmann, W.A. Wenzel,P. del Amo Sanchez, M. Barrett, T. J. Harrison,A. J. Hart,C. M. Hawkes, A. T. Watson,T. Held,Herbert Koch, B. Lewandowski, M. Pelizaeus,Krisztian Peters,Tamara Vazquez Schroeder,Michael Steinke, J. T. Boyd, J. P. Burke, W. N. Cottingham, D. Walker, D. J. Asgeirsson, T. Cuhadar-Donszelmann, B. G. Fulsom,C. Hearty, N. S. Knecht,T. S. Mattison,J. A. McKenna, A. Khan,P. Kyberd, M. Saleem, D. J. Sherwood,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, M. Bruinsma, M. Chao, S. Curry,Ivo M. Gough Eschrich, D. Kirkby, A. J. Lankford,P. Lund,M. Mandelkern, E. C. Martin, D. P. Stoker, S. Abachi, C. C. Buchanan,S. D. Foulkes, J. W. Gary, F. Liu,Owen Rosser Long, B. C. Shen, L. Zhang,E. J. Hill, H. P. Paar,Sh. Rahatlou,Vivek Sharma

Physical Review D（2007）

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摘要

We present a measurement of the time-dependent CP asymmetry for the neutral B-meson decay into the CP = +1 final state K-S(0)pi(0)pi(0), with K-S(0)->pi(+)pi(-). We use a sample of approximately 227 million B-meson pairs recorded at the Upsilon(4S) resonance with the BABAR detector at the PEP-II B-Factory at SLAC. From an unbinned maximum likelihood fit, we extract the mixing-induced CP-violation parameter S=0.72 +/- 0.71 +/- 0.08 and the direct CP-violation parameter C=0.23 +/- 0.52 +/- 0.13, where the first uncertainty is statistical and the second systematic.

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