Phys. Rev. Lett.
94,
121801
(2005)
[6 pages]
Study of B0→ρ±π∓ Time-Dependent CP Violation at Belle
C. C. Wang et al. Belle Collaboration
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C. C. Wang25, K. Abe7, K. Abe40, T. Abe7, I. Adachi7, H. Aihara42, Y. Asano46, T. Aushev11, A. M. Bakich37, Y. Ban32, A. Bay16, I. Bedny1, U. Bitenc12, I. Bizjak12, S. Blyth25, A. Bondar1, A. Bozek26, M. Bračko18,12, T. E. Browder6, P. Chang25, Y. Chao25, K.-F. Chen25, W. T. Chen22, B. G. Cheon2, S.-K. Choi5, Y. Choi36, A. Chuvikov33, S. Cole37, M. Dash47, L. Y. Dong9, J. Dragic19, A. Drutskoy3, S. Eidelman1, V. Eiges11, T. Gershon7, G. Gokhroo38, R. Guo23, J. Haba7, N. C. Hastings7, K. Hayasaka20, H. Hayashii21, M. Hazumi7, T. Hokuue20, Y. Hoshi40, S. Hou22, W.-S. Hou25, Y. B. Hsiung25,*, T. Iijima20, A. Imoto21, K. Inami20, A. Ishikawa7, H. Ishino43, K. Itoh42, R. Itoh7, H. Iwasaki7, Y. Iwasaki7, H. Kakuno42, J. H. Kang48, J. S. Kang14, P. Kapusta26, N. Katayama7, T. Kawasaki28, H. R. Khan43, H. Kichimi7, H. J. Kim15, K. Kinoshita3, P. Križan17,12, P. Krokovny1, S. Kumar31, Y.-J. Kwon48, J. S. Lange4, S. E. Lee35, Y.-J. Lee25, T. Lesiak26, J. Li34, A. Limosani19, S.-W. Lin25, J. MacNaughton10, T. Matsumoto44, A. Matyja26, Y. Mikami41, W. Mitaroff10, H. Miyata28, R. Mizuk11, D. Mohapatra47, T. Mori43, Y. Nagasaka8, T. Nakadaira42, E. Nakano29, M. Nakao7, Z. Natkaniec26, S. Nishida7, O. Nitoh45, T. Nozaki7, S. Ogawa39, T. Ohshima20, T. Okabe20, S. Okuno13, S. L. Olsen6, W. Ostrowicz26, H. Ozaki7, P. Pakhlov11, C. W. Park36, N. Parslow37, L. S. Peak37, L. E. Piilonen47, F. J. Ronga7, M. Rozanska26, H. Sagawa7, S. Saitoh7, Y. Sakai7, N. Sato20, T. Schietinger16, O. Schneider16, J. Schümann25, A. J. Schwartz3, S. Semenov11, K. Senyo20, M. E. Sevior19, H. Shibuya39, J. B. Singh31, A. Somov3, R. Stamen7, S. Stanič46,†, M. Starič12, K. Sumisawa30, T. Sumiyoshi44, S. Y. Suzuki7, O. Tajima41, F. Takasaki7, K. Tamai7, M. Tanaka7, G. N. Taylor19, Y. Teramoto29, X. C. Tian32, K. Trabelsi6, T. Tsukamoto7, S. Uehara7, T. Uglov11, K. Ueno25, S. Uno7, G. Varner6, K. E. Varvell37, S. Villa16, C. H. Wang24, M.-Z. Wang25, M. Watanabe28, B. D. Yabsley47, Y. Yamada7, A. Yamaguchi41, Y. Yamashita27, M. Yamauchi7, J. Ying32, Y. Yusa41, J. Zhang7, L. M. Zhang34, Z. P. Zhang34, V. Zhilich1, T. Ziegler33, and D. Žontar17,12 (Belle Collaboration)
1Budker Institute of Nuclear Physics, Novosibirsk
2Chonnam National University, Kwangju
3University of Cincinnati, Cincinnati, Ohio 45221
4University of Frankfurt, Frankfurt
5Gyeongsang National University, Chinju
6University of Hawaii, Honolulu, Hawaii 96822
7High Energy Accelerator Research Organization (KEK), Tsukuba
8Hiroshima Institute of Technology, Hiroshima
9Institute of High Energy Physics, Chinese Academy of Sciences, Beijing
10Institute of High Energy Physics, Vienna
11Institute for Theoretical and Experimental Physics, Moscow
12J. Stefan Institute, Ljubljana
13Kanagawa University, Yokohama
14Korea University, Seoul
15Kyungpook National University, Taegu
16Swiss Federal Institute of Technology of Lausanne, EPFL, Lausanne
17University of Ljubljana, Ljubljana
18University of Maribor, Maribor
19University of Melbourne, Victoria
20Nagoya University, Nagoya
21Nara Women’s University, Nara
22National Central University, Chung-li
23National Kaohsiung Normal University, Kaohsiung
24National United University, Miao Li
25Department of Physics, National Taiwan University, Taipei
26H. Niewodniczanski Institute of Nuclear Physics, Krakow
27Nihon Dental College, Niigata
28Niigata University, Niigata
29Osaka City University, Osaka
30Osaka University, Osaka
31Panjab University, Chandigarh
32Peking University, Beijing
33Princeton University, Princeton, New Jersey 08545
34University of Science and Technology of China, Hefei
35Seoul National University, Seoul
36Sungkyunkwan University, Suwon
37University of Sydney, Sydney, New South Wales
38Tata Institute of Fundamental Research, Bombay
39Toho University, Funabashi
40Tohoku Gakuin University, Tagajo
41Tohoku University, Sendai
42Department of Physics, University of Tokyo, Tokyo
43Tokyo Institute of Technology, Tokyo
44Tokyo Metropolitan University, Tokyo
45Tokyo University of Agriculture and Technology, Tokyo
46University of Tsukuba, Tsukuba
47Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
48Yonsei University, Seoul
Received 1 August 2004; published 1 April 2005
We present a time-dependent analysis of CP violation in B0→ρ±π∓ decays based on a 140 fb-1 data sample collected at the Υ(4S) resonance with the Belle detector at KEKB. We obtain the charge asymmetry ACPρπ=-0.16±0.10(stat)±0.02(syst). An unbinned maximum-likelihood fit to the Δt distributions yields Cρπ=0.25±0.17(stat)-0.06+0.02(syst), ΔCρπ=0.38±0.18(stat)-0.04+0.02(syst), Sρπ=-0.28±0.23(stat)-0.08+0.10(syst), and ΔSρπ=-0.30±0.24(stat)±0.09(syst). The direct CP violation parameters for B→ρ+π- and B→ρ-π+ decays are Aρπ+-=-0.02±0.16(stat)-0.02+0.05(syst) and Aρπ-+=-0.53±0.29(stat)-0.04+0.09(syst).
© 2005 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.121801
DOI:
10.1103/PhysRevLett.94.121801
PACS:
13.25.Hw, 11.30.Er, 12.15.Hh, 14.40.Nd
*On leave from Fermi National Accelerator Laboratory, Batavia, IL 60510. †On leave from Nova Gorica Polytechnic, Nova Gorica.
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