Phys. Rev. Lett.
98,
221602
(2007)
[6 pages]
Measurement of CP Asymmetry in a Time-Dependent Dalitz Analysis of B0→(ρπ)0 and a Constraint on the Quark Mixing Matrix Angle ϕ2
A. Kusaka et al. Belle Collaboration
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A. Kusaka47, C. C. Wang27, H. Ishino48, K. Abe9, K. Abe45, I. Adachi9, H. Aihara47, D. Anipko1, V. Aulchenko1, T. Aushev19,14, A. M. Bakich42, E. Barberio22, A. Bay19, I. Bedny1, K. Belous13, U. Bitenc15, I. Bizjak15, S. Blyth25, A. Bondar1, A. Bozek28, M. Bračko9,21,15, T. E. Browder8, M.-C. Chang4, P. Chang27, Y. Chao27, A. Chen25, K.-F. Chen27, W. T. Chen25, B. G. Cheon7, R. Chistov14, S.-K. Choi6, Y. Choi41, Y. K. Choi41, S. Cole42, J. Dalseno22, M. Danilov14, M. Dash51, J. Dragic9, A. Drutskoy3, S. Eidelman1, S. Fratina15, M. Fujikawa24, N. Gabyshev1, A. Garmash36, T. Gershon9, G. Gokhroo43, B. Golob20,15, H. Ha17, J. Haba9, T. Hara33, N. C. Hastings47, K. Hayasaka23, H. Hayashii24, M. Hazumi9, D. Heffernan33, T. Hokuue23, Y. Hoshi45, S. Hou25, W.-S. Hou27, Y. B. Hsiung27, T. Iijima23, K. Ikado23, A. Imoto24, K. Inami23, A. Ishikawa47, R. Itoh9, M. Iwasaki47, Y. Iwasaki9, H. Kaji23, H. Kakuno47, J. H. Kang52, P. Kapusta28, N. Katayama9, H. Kawai2, T. Kawasaki30, H. R. Khan48, H. Kichimi9, Y. J. Kim5, K. Kinoshita3, S. Korpar21,15, P. Križan20,15, P. Krokovny9, R. Kulasiri3, R. Kumar34, C. C. Kuo25, A. Kuzmin1, Y.-J. Kwon52, J. Lee39, M. J. Lee39, S. E. Lee39, T. Lesiak28, A. Limosani9, S.-W. Lin27, D. Liventsev14, F. Mandl12, D. Marlow36, T. Matsumoto49, K. Miyabayashi24, H. Miyake33, Y. Miyazaki23, R. Mizuk14, T. Mori23, E. Nakano32, M. Nakao9, H. Nakazawa9, Z. Natkaniec28, S. Nishida9, O. Nitoh50, S. Noguchi24, S. Ogawa44, T. Ohshima23, S. Okuno16, Y. Onuki37, H. Ozaki9, P. Pakhlov14, G. Pakhlova14, H. Park18, K. S. Park41, L. S. Peak42, R. Pestotnik15, L. E. Piilonen51, A. Poluektov1, Y. Sakai9, N. Satoyama40, O. Schneider19, J. Schümann26, A. J. Schwartz3, R. Seidl10,37, K. Senyo23, M. E. Sevior22, M. Shapkin13, H. Shibuya44, J. B. Singh34, A. Somov3, N. Soni34, S. Stanič31, M. Starič15, H. Stoeck42, S. Y. Suzuki9, O. Tajima9, F. Takasaki9, K. Tamai9, M. Tanaka9, G. N. Taylor22, Y. Teramoto32, X. C. Tian35, I. Tikhomirov14, K. Trabelsi9, T. Tsuboyama9, T. Tsukamoto9, S. Uehara9, T. Uglov14, Y. Unno7, S. Uno9, P. Urquijo22, Y. Ushiroda9, Y. Usov1, G. Varner8, S. Villa19, C. H. Wang26, M.-Z. Wang27, Y. Watanabe48, R. Wedd22, E. Won17, Q. L. Xie11, B. D. Yabsley42, A. Yamaguchi46, Y. Yamashita29, L. M. Zhang38, Z. P. Zhang38, V. Zhilich1, and A. Zupanc15 (Belle Collaboration)
1Budker Institute of Nuclear Physics, Novosibirsk
2Chiba University, Chiba
3University of Cincinnati, Cincinnati, Ohio 45221
4Department of Physics, Fu Jen Catholic University, Taipei
5The Graduate University for Advanced Studies, Hayama
6Gyeongsang National University, Chinju
7Hanyang University, Seoul
8University of Hawaii, Honolulu, Hawaii 96822
9High Energy Accelerator Research Organization (KEK), Tsukuba
10University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
11Institute of High Energy Physics, Chinese Academy of Sciences, Beijing
12Institute of High Energy Physics, Vienna
13Institute of High Energy Physics, Protvino
14Institute for Theoretical and Experimental Physics, Moscow
15J. Stefan Institute, Ljubljana
16Kanagawa University, Yokohama
17Korea University, Seoul
18Kyungpook National University, Taegu
19Swiss Federal Institute of Technology of Lausanne, EPFL, Lausanne
20University of Ljubljana, Ljubljana
21University of Maribor, Maribor
22University of Melbourne, Victoria
23Nagoya University, Nagoya
24Nara Women’s University, Nara
25National Central University, Chung-li
26National United University, Miao Li
27Department of Physics, National Taiwan University, Taipei
28H. Niewodniczanski Institute of Nuclear Physics, Krakow
29Nippon Dental University, Niigata
30Niigata University, Niigata
31University of Nova Gorica, Nova Gorica
32Osaka City University, Osaka
33Osaka University, Osaka
34Panjab University, Chandigarh
35Peking University, Beijing
36Princeton University, Princeton, New Jersey 08544
37RIKEN BNL Research Center, Upton, New York 11973
38University of Science and Technology of China, Hefei
39Seoul National University, Seoul
40Shinshu University, Nagano
41Sungkyunkwan University, Suwon
42University of Sydney, Sydney NSW
43Tata Institute of Fundamental Research, Bombay
44Toho University, Funabashi
45Tohoku Gakuin University, Tagajo
46Tohoku University, Sendai
47Department of Physics, University of Tokyo, Tokyo
48Tokyo Institute of Technology, Tokyo
49Tokyo Metropolitan University, Tokyo
50Tokyo University of Agriculture and Technology, Tokyo
51Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
52Yonsei University, Seoul
Received 10 January 2007; published 1 June 2007
We present a measurement of CP asymmetry using a time-dependent Dalitz plot analysis of B0→π+π-π0 decays based on a 414 fb-1 data sample containing 449×106BB̅ pairs. The data was collected on the Υ(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e- collider. Combining our analysis with information on charged B decay modes, we perform a full Dalitz and isospin analysis and obtain a constraint on the CKM angle ϕ2, 68°<ϕ2<95° as the 68.3% confidence interval for the ϕ2 solution consistent with the standard model (SM). A large SM-disfavored region also remains.
© 2007 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.98.221602
DOI:
10.1103/PhysRevLett.98.221602
PACS:
13.25.Hw, 11.30.Er, 12.15.Hh
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