Phys. Rev. D
71,
091106(R)
(2005)
[6 pages]
Measurements of branching fractions and CP asymmetries in B→ηh decays
P. Chang et al. Belle Collaboration
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P. Chang24, K. Abe7, K. Abe39, H. Aihara41, M. Akatsu19, Y. Asano44, T. Aushev10, A. M. Bakich36, V. Balagura10, Y. Ban31, S. Banerjee37, I. Bedny1, U. Bitenc11, I. Bizjak11, S. Blyth24, A. Bondar1, A. Bozek25, M. Bračko7,17,11, J. Brodzicka25, T. E. Browder6, Y. Chao24, A. Chen21, K.-F. Chen24, B. G. Cheon3, R. Chistov10, S.-K. Choi5, Y. Choi35, A. Chuvikov32, S. Cole36, J. Dalseno18, M. Danilov10, M. Dash45, J. Dragic18, A. Drutskoy4, S. Eidelman1, V. Eiges10, S. Fratina11, N. Gabyshev1, A. Garmash32, T. Gershon7, G. Gokhroo37, R. Guo22, J. Haba7, K. Hayasaka19, H. Hayashii20, M. Hazumi7, T. Hokuue19, Y. Hoshi39, S. Hou21, W.-S. Hou24, Y. B. Hsiung24, H.-C. Huang24, T. Iijima19, A. Imoto20, K. Inami19, A. Ishikawa7, R. Itoh7, M. Iwasaki41, Y. Iwasaki7, J. H. Kang46, J. S. Kang13, P. Kapusta25, N. Katayama7, H. Kawai2, T. Kawasaki27, H. R. Khan42, H. Kichimi7, H. J. Kim14, J. H. Kim35, S. K. Kim34, S. M. Kim35, P. Koppenburg7, S. Korpar17,11, P. Križan16,11, P. Krokovny1, R. Kulasiri4, C. C. Kuo21, Y.-J. Kwon46, S. E. Lee34, S. H. Lee34, T. Lesiak25, J. Li33, S.-W. Lin24, D. Liventsev10, G. Majumder37, F. Mandl9, T. Matsumoto43, W. Mitaroff9, K. Miyabayashi20, H. Miyake29, H. Miyata27, R. Mizuk10, D. Mohapatra45, T. Mori42, T. Nagamine40, Y. Nagasaka8, E. Nakano28, M. Nakao7, S. Nishida7, S. Ogawa38, T. Ohshima19, T. Okabe19, S. Okuno12, S. L. Olsen6, W. Ostrowicz25, H. Ozaki7, P. Pakhlov10, C. W. Park35, H. Park14, N. Parslow36, R. Pestotnik11, L. E. Piilonen45, M. Rozanska25, H. Sagawa7, Y. Sakai7, T. Schietinger15, O. Schneider15, P. Schönmeier40, J. Schümann24, A. J. Schwartz4, K. Senyo19, H. Shibuya38, J. B. Singh30, A. Somov4, N. Soni30, R. Stamen7, S. Stanič44, M. Starič11, K. Sumisawa29, T. Sumiyoshi43, O. Tajima7, F. Takasaki7, N. Tamura27, M. Tanaka7, Y. Teramoto28, X. C. Tian31, S. Uehara7, T. Uglov10, K. Ueno24, S. Uno7, Y. Ushiroda7, G. Varner6, K. E. Varvell36, S. Villa15, C. C. Wang24, C. H. Wang23, M.-Z. Wang24, A. Yamaguchi40, H. Yamamoto40, Y. Yamashita26, M. Yamauchi7, Heyoung Yang34, J. Ying31, J. Zhang7, L. M. Zhang33, Z. P. Zhang33, V. Zhilich1, and D. Žontar16,11 (Belle Collaboration)
1Budker Institute of Nuclear Physics, Novosibirsk
2Chiba University, Chiba
3Chonnam National University, Kwangju
4University of Cincinnati, Cincinnati, Ohio 45221, USA
5Gyeongsang National University, Chinju
6University of Hawaii, Honolulu, Hawaii 96822, USA
7High Energy Accelerator Research Organization (KEK), Tsukuba
8Hiroshima Institute of Technology, Hiroshima
9Institute of High Energy Physics, Vienna
10Institute for Theoretical and Experimental Physics, Moscow
11J. Stefan Institute, Ljubljana
12Kanagawa University, Yokohama
13Korea University, Seoul
14Kyungpook National University, Taegu
15Swiss Federal Institute of Technology of Lausanne, EPFL, Lausanne
16University of Ljubljana, Ljubljana
17University of Maribor, Maribor
18University of Melbourne, Victoria
19Nagoya University, Nagoya
20Nara Women’s University, Nara
21National Central University, Chung-li
22National Kaohsiung Normal University, Kaohsiung
23National United University, Miao Li
24Department of Physics, National Taiwan University, Taipei
25H. Niewodniczanski Institute of Nuclear Physics, Krakow
26Nihon Dental College, Niigata
27Niigata University, Niigata
28Osaka City University, Osaka
29Osaka University, Osaka
30Panjab University, Chandigarh
31Peking University, Beijing
32Princeton University, Princeton, New Jersey 08545, USA
33University of Science and Technology of China, Hefei
34Seoul National University, Seoul
35Sungkyunkwan University, Suwon
36University of Sydney, Sydney NSW
37Tata Institute of Fundamental Research, Bombay
38Toho University, Funabashi
39Tohoku Gakuin University, Tagajo
40Tohoku University, Sendai
41Department of Physics, University of Tokyo, Tokyo
42Tokyo Institute of Technology, Tokyo
43Tokyo Metropolitan University, Tokyo
44University of Tsukuba, Tsukuba
45Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA
46Yonsei University, Seoul
Received 14 December 2004; published 23 May 2005
We report measurements of B to pseudoscalar-pseudoscalar decays with at least one η meson in the final state using 140 fb-1 of data collected by the Belle detector at KEKB e+e- collider. We observe the decay B+→ηπ+ and find evidence of B+→ηK+; the measured branching fractions are B(B+→ηπ+)=(4.8-0.7+0.8(stat)±0.3(sys))×10-6 and B(B+→ηK+)=(2.1±0.6(stat)±0.2(sys))×10-6. Their corresponding CP violating asymmetries are measured to be 0.07±0.15(stat)±0.03(sys) for ηπ± and -0.49±0.31(stat)±0.07(sys) for ηK±. No significant signals are found for neutral B→ηh decays. We report the following upper limits on branching fractions at the 90% confidence level: B(B0→ηK0)<2.0×10-6,B(B0→ηπ0)<2.5×10-6 and B(B0→ηη)<2.0×10-6.
© 2005 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.71.091106
DOI:
10.1103/PhysRevD.71.091106
PACS:
13.25.Hw, 11.30.Er, 12.15.Hh
on leave from Nova Gorica Polytechnic, Nova Gorica
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