Phys. Rev. Lett.
88,
162001
(2002)
[6 pages]
Measurement of the Lifetime Difference in D0 Meson Decays
K. Abe et al. (Belle Collaboration)
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K. Abe8, K. Abe42, R. Abe31, T. Abe43, I. Adachi8, Byoung Sup Ahn16, H. Aihara44, M. Akatsu24, Y. Asano49, T. Aso48, V. Aulchenko2, T. Aushev13, A. M. Bakich40, Y. Ban35, S. Behari8, P. K. Behera50, A. Bondar2, A. Bozek29, T. E. Browder7, B. C. K. Casey7, Y. Chao28, B. G. Cheon39, R. Chistov13, Y. Choi39, L. Y. Dong11, S. Eidelman2, V. Eiges13, F. Fang7, H. Fujii8, C. Fukunaga46, M. Fukushima10, N. Gabyshev8, A. Garmash2,9, T. Gershon8, A. Gordon22, R. Guo26, J. Haba8, H. Hamasaki8, K. Hanagaki36, F. Handa43, K. Hara33, T. Hara33, N. C. Hastings22, H. Hayashii25, M. Hazumi33, E. M. Heenan22, I. Higuchi43, T. Higuchi44, T. Hojo33, T. Hokuue24, Y. Hoshi42, K. Hoshina47, S. R. Hou28, W.-S. Hou28, S.-C. Hsu28, H.-C. Huang28, Y. Igarashi8, T. Iijima8, H. Ikeda8, K. Inami24, A. Ishikawa24, H. Ishino45, R. Itoh8, H. Iwasaki8, Y. Iwasaki8, P. Jalocha29, H. K. Jang38, J. H. Kang53, J. S. Kang16, N. Katayama8, H. Kawai3, H. Kawai44, N. Kawamura1, T. Kawasaki31, H. Kichimi8, D. W. Kim39, Heejong Kim53, H. J. Kim53, H. O. Kim39, Hyunwoo Kim16, T. H. Kim53, K. Kinoshita5, S. Kobayashi37, H. Konishi47, S. Korpar21,14, P. Križan20,14, P. Krokovny2, R. Kulasiri5, S. Kumar34, A. Kuzmin2, Y.-J. Kwon53, J. S. Lange6, G. Leder12, S. H. Lee38, D. Liventsev13, J. MacNaughton12, D. Marlow36, T. Matsubara44, S. Matsumoto4, T. Matsumoto24, Y. Mikami43, K. Miyabayashi25, H. Miyake33, H. Miyata31, G. R. Moloney22, S. Mori49, T. Mori4, A. Murakami37, T. Nagamine43, Y. Nagasaka9, Y. Nagashima33, T. Nakadaira44, E. Nakano32, M. Nakao8, J. W. Nam39, Z. Natkaniec29, K. Neichi42, S. Nishida17, O. Nitoh47, S. Noguchi25, T. Nozaki8, S. Ogawa41, T. Ohshima24, T. Okabe24, S. Okuno15, S. L. Olsen7, W. Ostrowicz29, H. Ozaki8, P. Pakhlov13, H. Palka29, C. S. Park38, C. W. Park16, H. Park18, K. S. Park39, J.-P. Perroud19, M. Peters7, L. E. Piilonen51, J. L. Rodriguez7, N. Root2, M. Rozanska29, K. Rybicki29, H. Sagawa8, Y. Sakai8, H. Sakamoto17, M. Satapathy50, A. Satpathy9,5, S. Schrenk5, S. Semenov13, K. Senyo24, M. E. Sevior22, H. Shibuya41, B. Shwartz2, J. B. Singh34, S. Stanič49, K. Sumisawa8, T. Sumiyoshi8, S. Suzuki52, S. Y. Suzuki8, S. K. Swain7, H. Tajima44, T. Takahashi32, F. Takasaki8, M. Takita33, K. Tamai8, N. Tamura31, J. Tanaka44, M. Tanaka8, Y. Tanaka23, Y. Teramoto32, M. Tomoto8, T. Tomura44, S. N. Tovey22, K. Trabelsi7, T. Tsuboyama8, T. Tsukamoto8, S. Uehara8, K. Ueno28, Y. Unno3, S. Uno8, Y. Ushiroda8, K. E. Varvell40, C. C. Wang28, C. H. Wang27, J. G. Wang51, M.-Z. Wang28, Y. Watanabe45, E. Won38, B. D. Yabsley8, Y. Yamada8, M. Yamaga43, A. Yamaguchi43, H. Yamamoto43, Y. Yamashita30, M. Yamauchi8, M. Yokoyama44, K. Yoshida24, Y. Yusa43, C. C. Zhang11, J. Zhang49, Y. Zheng7, V. Zhilich2, and D. Žontar49 (Belle Collaboration)
1Aomori University, Aomori
2Budker Institute of Nuclear Physics, Novosibirsk
3Chiba University, Chiba
4Chuo University, Tokyo
5University of Cincinnati, Cincinnati, Ohio 45221-0011
6University of Frankfurt, Frankfurt
7University of Hawaii, Honolulu, Hawaii 96822
8High Energy Accelerator Research Organization (KEK), Tsukuba
9Hiroshima Institute of Technology, Hiroshima
10Institute for Cosmic Ray Research, University of Tokyo, Tokyo
11Institute of High Energy Physics, Chinese Academy of Sciences, Beijing
12Institute of High Energy Physics, Vienna
13Institute for Theoretical and Experimental Physics, Moscow
14J. Stefan Institute, Ljubljana
15Kanagawa University, Yokohama
16Korea University, Seoul
17Kyoto University, Kyoto
18Kyungpook National University, Taegu
19Institute for High Energy Physics, University of Lausanne, Lausanne
20University of Ljubljana, Ljubljana
21University of Maribor, Maribor
22University of Melbourne, Victoria
23Nagasaki Institute of Applied Science, Nagasaki
24Nagoya University, Nagoya
25Nara Women's University, Nara
26National Kaohsiung Normal University, Kaohsiung
27National Lien-Ho Institute of Technology, Miao Li
28National Taiwan University, Taipei
29H. Niewodniczanski Institute of Nuclear Physics, Krakow
30Nihon Dental College, Niigata
31Niigata University, Niigata
32Osaka City University, Osaka
33Osaka University, Osaka
34Panjab University, Chandigarh
35Peking University, Beijing
36Princeton University, Princeton, New Jersey 08544
37Saga University, Saga
38Seoul National University, Seoul
39Sungkyunkwan University, Suwon
40University of Sydney, Sydney NSW
41Toho University, Funabashi
42Tohoku Gakuin University, Tagajo
43Tohoku University, Sendai
44University of Tokyo, Tokyo
45Tokyo Institute of Technology, Tokyo
46Tokyo Metropolitan University, Tokyo
47Tokyo University of Agriculture and Technology, Tokyo
48Toyama National College of Maritime Technology, Toyama
49University of Tsukuba, Tsukuba
50Utkal University, Bhubaneswer
51Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061-0435
52Yokkaichi University, Yokkaichi
53Yonsei University, Seoul
Received 6 November 2001; published 8 April 2002
We report a measurement of the D0-D̅ 0 mixing parameter yCP using 23.4fb-1 of data collected near the ϒ(4S) resonance with the Belle detector at KEKB. yCP is measured from the lifetime difference of D0 mesons decaying into the K-π+ state and the CP-even eigenstate K-K+. We find yCP = (-0.5±1.0-0.8+0.7)×10-2, where the first error is statistical and the second is systematic, corresponding to a 95% confidence interval -0.030<yCP<0.020.
© 2002 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.88.162001
DOI:
10.1103/PhysRevLett.88.162001
PACS:
13.25.Ft, 12.15.Ff, 14.40.Lb
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