Measurement of the branching fraction of Υ(4S)→B0B̄0

  • B. Aubert
  • , R. Barate
  • , D. Boutigny
  • , F. Couderc
  • , Y. Karyotakis
  • , J. P. Lees
  • , V. Poireau
  • , V. Tisserand
  • , A. Zghiche
  • , E. Grauges-Pous
  • , A. Palano
  • , M. Pappagallo
  • , A. Pompili
  • , J. C. Chen
  • , N. D. Qi
  • , G. Rong
  • , P. Wang
  • , Y. S. Zhu
  • , G. Eigen
  • , I. Ofte
  • B. Stugu, G. S. Abrams, A. W. Borgland, A. B. Breon, D. N. Brown, J. Button-Shafer, R. N. Cahn, E. Charles, C. T. Day, M. S. Gill, A. V. Gritsan, Y. Groysman, R. G. Jacobsen, R. W. Kadel, J. Kadyk, L. T. Kerth, Yu G. Kolomensky, G. Kukartsev, G. Lynch, L. M. Mir, P. J. Oddone, T. J. Orimoto, M. Pripstein, N. A. Roe, M. T. Ronan, W. A. Wenzel, M. Barrett, K. E. Ford, T. J. Harrison, A. J. Hart, C. M. Hawkes, S. E. Morgan, A. T. Watson, M. Fritsch, K. Goetzen, T. Held, H. Koch, B. Lewandowski, M. Pelizaeus, K. Peters, T. Schroeder, M. Steinke, J. T. Boyd, J. P. Burke, N. Chevalier, W. N. Cottingham, M. P. Kelly, T. Cuhadar-Donszelmann, C. Hearty, N. S. Knecht, T. S. Mattison, J. A. McKenna, D. Thiessen, A. Khan, P. Kyberd, L. Teodorescu, A. E. Blinov, V. E. Blinov, A. D. Bukin, V. P. Druzhinin, V. B. Golubev, V. N. Ivanchenko, E. A. Kravchenko, A. P. Onuchin, S. I. Serednyakov, Yu I. Skovpen, E. P. Solodov, A. N. Yushkov, D. Best, M. Bondioli, M. Bruinsma, M. Chao, I. Eschrich, D. Kirkby, A. J. Lankford, M. Mandelkern, R. K. Mommsen, W. Roethel, D. P. Stoker

Research output: Contribution to journalArticlepeer-review

Abstract

We report the first measurement of the branching fraction f00 for Υ(4S)→B0B̄0. The data sample consists of 81.7fb-1 collected at the Υ(4S) resonance with the BABAR detector at the SLAC PEP-II asymmetric-energy e+e- storage ring. Using partial reconstruction of the decay B̄0→D*+ -ν̄ in which only the charged lepton and the soft pion from the decay D*+→D0π+ are reconstructed, we obtain f00=0.487±0.010(stat)±0.008(syst). Our result does not depend on the branching fractions of B̄0→D*+ -ν̄ and D*+→D0π+ decays, on the ratio of the charged and neutral B meson lifetimes, nor on the assumption of isospin symmetry.

Original languageEnglish
Article number042001
JournalPhysical Review Letters
Volume95
Issue number4
DOIs
Publication statusPublished - 22 Jul 2005
Externally publishedYes

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