Phys. Rev. D
72,
011101(R)
(2005)
[5 pages]
Search for the b→dγ process
D. Mohapatra et al. Belle Collaboration
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D. Mohapatra47, M. Nakao7, B. D. Yabsley47, K. Abe7, K. Abe40, H. Aihara42, K. Arinstein1, Y. Asano46, T. Aushev11, T. Aziz38, S. Bahinipati4, A. M. Bakich37, E. Barberio18, M. Barbero6, I. Bedny1, U. Bitenc12, I. Bizjak12, A. Bondar1, A. Bozek24, M. Bračko7,49,12, J. Brodzicka24, T. E. Browder6, Y. Chao23, A. Chen21, W. T. Chen21, B. G. Cheon3, R. Chistov11, S.-K. Choi5, Y. Choi36, A. Chuvikov32, J. Dalseno18, M. Danilov11, M. Dash47, J. Dragic7, S. Eidelman1, T. Gershon7, G. Gokhroo38, B. Golob17,12, A. Gorišek12, T. Hara29, K. Hayasaka19, M. Hazumi7, L. Hinz16, T. Hokuue19, Y. Hoshi40, S. Hou21, W.-S. Hou23, Y. B. Hsiung23, T. Iijima19, K. Ikado19, A. Imoto20, K. Inami19, A. Ishikawa7, M. Iwasaki42, Y. Iwasaki7, J. H. Kang48, J. S. Kang14, H. Kawai2, T. Kawasaki26, H. R. Khan43, H. J. Kim15, S. M. Kim36, K. Kinoshita4, P. Križan17,12, P. Krokovny1, R. Kulasiri4, C. C. Kuo21, A. Kuzmin1, Y.-J. Kwon48, G. Leder10, S. E. Lee34, T. Lesiak24, J. Li33, A. Limosani7, S.-W. Lin23, D. Liventsev11, G. Majumder38, F. Mandl10, A. Matyja24, Y. Mikami41, W. Mitaroff10, H. Miyata26, G. R. Moloney18, T. Nagamine41, Y. Nagasaka8, E. Nakano28, H. Nakazawa7, S. Nishida7, O. Nitoh45, T. Nozaki7, S. Ogawa39, T. Ohshima19, S. Okuno13, S. L. Olsen6, Y. Onuki26, W. Ostrowicz24, H. Ozaki7, P. Pakhlov11, H. Park15, R. Pestotnik12, L. E. Piilonen47, Y. Sakai7, T. R. Sarangi7, N. Sato19, N. Satoyama35, T. Schietinger16, O. Schneider16, J. Schümann23, A. J. Schwartz4, K. Senyo19, M. E. Sevior18, H. Shibuya39, A. Somov4, N. Soni30, R. Stamen7, S. Stanič27, M. Starič12, T. Sumiyoshi44, F. Takasaki7, K. Tamai7, N. Tamura26, M. Tanaka7, G. N. Taylor18, Y. Teramoto28, X. C. Tian31, K. Trabelsi6, S. Uehara7, T. Uglov11, K. Ueno23, S. Uno7, G. Varner6, S. Villa16, C. C. Wang23, C. H. Wang22, Y. Watanabe43, Q. L. Xie9, Y. Yamashita25, M. Yamauchi7, Heyoung Yang34, J. Ying31, C. C. Zhang9, J. Zhang7, L. M. Zhang33, Z. P. Zhang33, V. Zhilich1, and D. Zürcher16 (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, 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 Melbourne, Victoria
19Nagoya University, Nagoya
20Nara Women’s University, Nara
21National Central University, Chung-li
22National United University, Miao Li
23Department of Physics, National Taiwan University, Taipei
24H. Niewodniczanski Institute of Nuclear Physics, Krakow
25Nippon Dental University, Niigata
26Niigata University, Niigata
27Nova Gorica Polytechnic, Nova Gorica
28Osaka City University, Osaka
29Osaka University, Osaka
30Panjab University, Chandigarh
31Peking University, Beijing
32Princeton University, Princeton, New Jersey 08544, USA
33University of Science and Technology of China, Hefei
34Seoul National University, Seoul
35Shinshu University, Nagano
36Sungkyunkwan University, Suwon
37University of Sydney, Sydney NSW
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, USA
48Yonsei University, Seoul
49University of Maribor, Maribor
Received 30 May 2005; published 11 July 2005
We report the results of a search for the flavor-changing neutral current process b→dγ using a sample of 275×106 B meson pairs accumulated by the Belle detector at KEKB. We find no significant signal for the exclusive decays B-→ρ-γ, B̅ 0→ρ0γ, or B̅ 0→ωγ. Assuming an isospin relation between the three modes, we set an upper limit for the combined branching fraction B(B→(ρ,ω)γ), of 1.4×10-6 at the 90% confidence level. This limit can be used to constrain the ratio of CKM matrix elements |Vtd/Vts|.
© 2005 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.72.011101
DOI:
10.1103/PhysRevD.72.011101
PACS:
11.30.Hv, 13.40.Hq, 14.65.Fy, 14.40.Nd
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