Study of time-dependent CP violation in B0-->J/psipi0 decays

S U Kataoka; K Abe; K Abe; I Adachi; H Aihara; M Akatsu; Y Asano; T Aushev; S Bahinipati; A M Bakich; A Bay; I Bedny; U Bitenc; I Bizjak; A Bondar; M Bracko; Y Chao; A Chen; W T Chen; B G Cheon; R Chistov; Y Choi; M Danilov; M Dash; L Y Dong; J Dragic; S Eidelman; V Eiges; Y Enari; F Fang; S Fratina; N Gabyshev; A Garmash; T Gershon; A Go; G Gokhroo; B Golob; J Haba; K Hara; N C Hastings; K Hayasaka; H Hayashii; M Hazumi; T Higuchi; L Hinz; T Hokuue; Y Hoshi; S Hou; W-S Hou; Y B Hsiung; T Iijima; A Imoto; K Inami; A Ishikawa; H Ishino; R Itoh; M Iwasaki; Y Iwasaki; J H Kang; J S Kang; P Kapusta; N Katayama; H Kawai; T Kawasaki; H R Khan; H J Kim; K Kinoshita; P Koppenburg; S Korpar; P Krizan; P Krokovny; C C Kuo; A Kuzmin; Y-J Kwon; J S Lange; G Leder; S E Lee; S H Lee; T Lesiak; J Li; S-W Lin; J MacNaughton; F Mandl; T Matsumoto; W Mitaroff; K Miyabayashi; H Miyake; H Miyata; D Mohapatra; T Mori; T Nagamine; Y Nagasaka; E Nakano; H Nakazawa; Z Natkaniec; S Nishida; O Nitoh; S Noguchi; S Ogawa; T Ohshima; T Okabe; S Okuno; S L Olsen; Y Onuki; W Ostrowicz; H Ozaki; P Pakhlov; H Palka; H Park; L S Peak; L E Piilonen; F J Ronga; M Rozanska; H Sagawa; Y Sakai; N Sato; T Schietinger; O Schneider; J Schümann; A J Schwartz; S Semenov; K Senyo; M E Sevior; T Shibata; H Shibuya; J B Singh; A Somov; N Soni; R Stamen; M Staric; K Sumisawa; T Sumiyoshi; O Tajima; F Takasaki; N Tamura; M Tanaka; G N Taylor; Y Teramoto; K Trabelsi; T Tsukamoto; K Ueno; S Uno; G Varner; S Villa; C C Wang; C H Wang; M Watanabe; B D Yabsley; A Yamaguchi; Y Yamashita; Heyoung Yang; J Ying; Y Yuan; S L Zang; C C Zhang; J Zhang; L M Zhang; Z P Zhang; V Zhilich; T Ziegler; D Zontar; Belle Corporation

doi:10.1103/PhysRevLett.93.261801

Study of time-dependent CP violation in B0-->J/psipi0 decays

Phys Rev Lett. 2004 Dec 31;93(26 Pt 1):261801. doi: 10.1103/PhysRevLett.93.261801. Epub 2004 Dec 21.

Authors

S U Kataoka¹, K Abe, K Abe, I Adachi, H Aihara, M Akatsu, Y Asano, T Aushev, S Bahinipati, A M Bakich, A Bay, I Bedny, U Bitenc, I Bizjak, A Bondar, M Bracko, Y Chao, A Chen, W T Chen, B G Cheon, R Chistov, Y Choi, M Danilov, M Dash, L Y Dong, J Dragic, S Eidelman, V Eiges, Y Enari, F Fang, S Fratina, N Gabyshev, A Garmash, T Gershon, A Go, G Gokhroo, B Golob, J Haba, K Hara, N C Hastings, K Hayasaka, H Hayashii, M Hazumi, T Higuchi, L Hinz, T Hokuue, Y Hoshi, S Hou, W-S Hou, Y B Hsiung, T Iijima, A Imoto, K Inami, A Ishikawa, H Ishino, R Itoh, M Iwasaki, Y Iwasaki, J H Kang, J S Kang, P Kapusta, N Katayama, H Kawai, T Kawasaki, H R Khan, H J Kim, K Kinoshita, P Koppenburg, S Korpar, P Krizan, P Krokovny, C C Kuo, A Kuzmin, Y-J Kwon, J S Lange, G Leder, S E Lee, S H Lee, T Lesiak, J Li, S-W Lin, J MacNaughton, F Mandl, T Matsumoto, W Mitaroff, K Miyabayashi, H Miyake, H Miyata, D Mohapatra, T Mori, T Nagamine, Y Nagasaka, E Nakano, H Nakazawa, Z Natkaniec, S Nishida, O Nitoh, S Noguchi, S Ogawa, T Ohshima, T Okabe, S Okuno, S L Olsen, Y Onuki, W Ostrowicz, H Ozaki, P Pakhlov, H Palka, H Park, L S Peak, L E Piilonen, F J Ronga, M Rozanska, H Sagawa, Y Sakai, N Sato, T Schietinger, O Schneider, J Schümann, A J Schwartz, S Semenov, K Senyo, M E Sevior, T Shibata, H Shibuya, J B Singh, A Somov, N Soni, R Stamen, M Staric, K Sumisawa, T Sumiyoshi, O Tajima, F Takasaki, N Tamura, M Tanaka, G N Taylor, Y Teramoto, K Trabelsi, T Tsukamoto, K Ueno, S Uno, G Varner, S Villa, C C Wang, C H Wang, M Watanabe, B D Yabsley, A Yamaguchi, Y Yamashita, Heyoung Yang, J Ying, Y Yuan, S L Zang, C C Zhang, J Zhang, L M Zhang, Z P Zhang, V Zhilich, T Ziegler, D Zontar; Belle Corporation

Affiliation

¹ Nara Women's University, Nara.

PMID: 15697967
DOI: 10.1103/PhysRevLett.93.261801

Abstract

We report a measurement of CP asymmetry parameters in the decay B0(B (0))-->J/psipi(0), which is governed by the b-->cc d transition. The analysis is based on a 140 fb(-1) data sample accumulated at the Upsilon(4S) resonance by the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. One neutral B meson in the J/psipi(0) final state is fully reconstructed for events used in this analysis. The accompanying B meson flavor is identified by its decay products. From the distribution of proper-time intervals between the two B decays, we obtain the following CP-violating parameters: S(J/psipi(0))=-0.72+/-0.42(stat)+/-0.09(syst) and A(J/psipi(0))=-0.01+/-0.29(stat)+/-0.03(syst).