Studies of B0-B̄0 mixing properties with inclusive dilepton events

N. C. Hastings, K. Abe, K. Abe, R. Abe, T. Abe, I. Adachi, H. Aihara, M. Akatsu, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A. M. Bakich, Y. Ban, E. Banas, A. Bay, I. Bedny, I. Bizjak, A. Bondar, A. BozekM. Bračko, J. Brodzicka, T. E. Browder, B. C.K. Casey, M. C. Chang, P. Chang, Y. Chao, K. F. Chen, B. G. Cheon, R. Chistov, S. K. Choi, Y. Choi, Y. K. Choi, M. Danilov, L. Y. Dong, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, C. W. Everton, F. Fang, C. Fukunaga, N. Gabyshev, A. Garmash, T. Gershon, B. Golob, J. Haba, C. Hagner, F. Handa, T. Hara, K. Hasuko, H. Hayashii, M. Hazumi, I. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. C. Huang, T. Igaki, Y. Igarashi, T. Lijima, K. Inami, A. Ishikawa, R. Itoh, H. Iwasaki, Y. Iwasaki, H. K. Jang, J. H. Kang, J. S. Kang, P. Kapusta, S. U. Kataoka, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, D. W. Kim, H. J. Kim, H. O. Kim, Hyunwoo Kim, J. H. Kim, S. K. Kim, K. Kinoshita, S. Kobayashi, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, S. Kumar, A. Kuzmin, Y. J. Kwon, J. S. Lange, G. Leder, S. H. Lee, J. Li, S. W. Lin, D. Liventsev, R. S. Lu

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41 Citations (Scopus)


We report a precise determination of the Z0-B̄0 mixing parameter Δmd based on the time evolution of same-sign and opposite-sign dilepton yields in Y(45) decays. Data were collected with the Belle detector at KEKB. Using data samples of 29.4 fb-1 recorded at the γ(4S) resonance and 3.0 fb-1 recorded at an energy 60 MeV below the resonance, we measure Δmd=[0.503±0.008(stat) ±0.010(syst)] ps-1. From the same analysis, we also measure the ratio of charged and neutral B meson production at the γ(4S), f +/f0= 1-01 ±0.03(stat)±0.09(syst), and CPT violation parameters in B0-B̄0 mixing, (cos θ)=0.00±0.12(stat) ±0.01(syst) and ℑ(cos θ)=0.03±0.01(stat)±0.03(syst).

Original languageEnglish
Article number052004
JournalPhysical Review D
Issue number5
Publication statusPublished - 2003

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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