Phys. Rev. Lett.
99,
131802
(2007)
[6 pages]
Measurement of Einstein-Podolsky-Rosen-Type Flavor Entanglement in Υ(4S)→B0B̅ 0 Decays
A. Go et al. Belle Collaboration
Show All Authors/Affiliations
Hide All Authors/Affiliations
A. Go22, A. Bay16, K. Abe7, H. Aihara43, D. Anipko1, V. Aulchenko1, T. Aushev16,12, A. M. Bakich38, E. Barberio19, K. Belous11, U. Bitenc13, I. Bizjak13, S. Blyth22, A. Bozek25, M. Bračko7,18,13, T. E. Browder6, P. Chang24, Y. Chao24, A. Chen22, K.-F. Chen24, W. T. Chen22, B. G. Cheon5, R. Chistov12, Y. Choi37, Y. K. Choi37, S. Cole38, J. Dalseno19, M. Danilov12, M. Dash47, A. Drutskoy2, S. Eidelman1, D. Epifanov1, S. Fratina13, N. Gabyshev1, T. Gershon7, G. Gokhroo39, B. Golob17,13, A. Gorišek13, H. Ha14, N. C. Hastings43, K. Hayasaka20, H. Hayashii21, M. Hazumi7, D. Heffernan30, T. Hokuue20, Y. Hoshi41, S. Hou22, W.-S. Hou24, T. Iijima20, K. Ikado20, A. Imoto21, K. Inami20, A. Ishikawa43, H. Ishino44, R. Itoh7, M. Iwasaki43, Y. Iwasaki7, C. Jacoby16, J. H. Kang48, N. Katayama7, T. Kawasaki27, H. R. Khan44, H. Kichimi7, H. J. Kim15, S. K. Kim35, Y. J. Kim4, K. Kinoshita2, S. Korpar18,13, P. Križan17,13, P. Krokovny7, R. Kulasiri2, R. Kumar31, C. C. Kuo22, A. Kuzmin1, Y.-J. Kwon48, J. S. Lange3, J. Lee35, M. J. Lee35, T. Lesiak25, A. Limosani7, S.-W. Lin24, Y. Liu4, D. Liventsev12, T. Matsumoto45, A. Matyja25, S. McOnie38, W. Mitaroff10, H. Miyake30, H. Miyata27, Y. Miyazaki20, R. Mizuk12, T. Mori20, E. Nakano29, M. Nakao7, Z. Natkaniec25, S. Nishida7, O. Nitoh46, S. Ogawa40, T. Ohshima20, S. L. Olsen6, Y. Onuki33, P. Pakhlov12, G. Pakhlova12, H. Palka25, C. W. Park37, H. Park15, L. S. Peak38, R. Pestotnik13, M. Peters6, L. E. Piilonen47, H. Sahoo6, Y. Sakai7, N. Satoyama36, T. Schietinger16, O. Schneider16, J. Schümann23, A. J. Schwartz2, R. Seidl8,33, K. Senyo20, M. Shapkin11, H. Shibuya40, B. Shwartz1, J. B. Singh31, A. Somov2, N. Soni31, S. Stanič28, M. Starič13, H. Stoeck38, T. Sumiyoshi45, F. Takasaki7, M. Tanaka7, G. N. Taylor19, Y. Teramoto29, X. C. Tian32, I. Tikhomirov12, K. Trabelsi6, T. Tsuboyama7, T. Tsukamoto7, S. Uehara7, T. Uglov12, K. Ueno24, Y. Unno5, S. Uno7, G. Varner6, S. Villa16, C. C. Wang24, C. H. Wang23, M.-Z. Wang24, Y. Watanabe44, J. Wicht16, E. Won14, Q. L. Xie9, B. D. Yabsley38, A. Yamaguchi42, Y. Yamashita26, M. Yamauchi7, Z. P. Zhang34, V. Zhilich1, and A. Zupanc13 (Belle Collaboration)
1Budker Institute of Nuclear Physics, Novosibirsk
2University of Cincinnati, Cincinnati, Ohio 45221
3Justus-Liebig-Universität Gießen, Gießen
4The Graduate University for Advanced Studies, Hayama
5Hanyang University, Seoul
6University of Hawaii, Honolulu, Hawaii 96822
7High Energy Accelerator Research Organization (KEK), Tsukuba
8University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
9Institute of High Energy Physics, Chinese Academy of Sciences, Beijing
10Institute of High Energy Physics, Vienna
11Institute of High Energy Physics, Protvino
12Institute for Theoretical and Experimental Physics, Moscow
13J. Stefan Institute, Ljubljana
14Korea University, Seoul
15Kyungpook National University, Taegu
16Ecole Polytechnique Fédérale Lausanne, 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 United University, Miao Li
24Department of Physics, National Taiwan University, Taipei
25H. Niewodniczanski Institute of Nuclear Physics, Krakow
26Nippon Dental University, Niigata
27Niigata University, Niigata
28University of Nova Gorica, Nova Gorica
29Osaka City University, Osaka
30Osaka University, Osaka
31Panjab University, Chandigarh
32Peking University, Beijing
33RIKEN BNL Research Center, Upton, New York 11973
34University of Science and Technology of China, Hefei
35Seoul National University, Seoul
36Shinshu University, Nagano
37Sungkyunkwan University, Suwon
38University of Sydney, Sydney New South Wales
39Tata Institute of Fundamental Research, Mumbai
40Toho University, Funabashi
41Tohoku Gakuin University, Tagajo
42Tohoku University, Sendai
43Department of Physics, University of Tokyo, Tokyo
44Tokyo Institute of Technology, Tokyo
45Tokyo Metropolitan University, Tokyo
46Tokyo University of Agriculture and Technology, Tokyo
47Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
48Yonsei University, Seoul
Received 1 March 2007; published 26 September 2007
The neutral B meson pair produced at the Υ(4S) should exhibit a nonlocal correlation of the type discussed by Einstein, Podolsky, and Rosen. We measure this correlation using the time-dependent flavor asymmetry of semileptonic B0 decays, which we compare with predictions from quantum mechanics and two local realistic models. The data are consistent with quantum mechanics, and inconsistent with the other models. Assuming that some B pairs disentangle to produce B0 and B̅ 0 with definite flavor, we find a decoherent fraction of 0.029±0.057, consistent with no decoherence.
© 2007 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.131802
DOI:
10.1103/PhysRevLett.99.131802
PACS:
13.25.Hw, 03.65.Ud, 03.65.Yz
|
|
