Studies of B 0-B̄ 0 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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34 Citations (Scopus)


We report a precise determination of the Z 0-B̄ 0 mixing parameter Δm d 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 Δm d=[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 +/f 0= 1-01 ±0.03(stat)±0.09(syst), and CPT violation parameters in B 0-B̄ 0 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

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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