Measurement of B(Υ(5S)→Bs(*)B̄s(*)) using mesons

G. S. Huang, D. H. Miller, V. Pavlunin, B. Sanghi, I. P.J. Shipsey, B. Xin, G. S. Adams, M. Anderson, J. P. Cummings, I. Danko, J. Napolitano, Q. He, J. Insler, H. Muramatsu, C. S. Park, E. H. Thorndike, F. Yang, T. E. Coan, Y. S. Gao, F. LiuM. Artuso, S. Blusk, J. Butt, J. Li, N. Menaa, R. Mountain, S. Nisar, K. Randrianarivony, R. Redjimi, R. Sia, T. Skwarnicki, S. Stone, J. C. Wang, K. Zhang, S. E. Csorna, G. Bonvicini, D. Cinabro, M. Dubrovin, A. Lincoln, D. M. Asner, K. W. Edwards, R. A. Briere, I. Brock, J. Chen, T. Ferguson, G. Tatishvili, H. Vogel, M. E. Watkins, J. L. Rosner, N. E. Adam, J. P. Alexander, K. Berkelman, D. G. Cassel, J. E. Duboscq, K. M. Ecklund, R. Ehrlich, L. Fields, L. Gibbons, R. Gray, S. W. Gray, D. L. Hartill, B. K. Heltsley, D. Hertz, C. D. Jones, J. Kandaswamy, D. L. Kreinick, V. E. Kuznetsov, H. Mahlke-Krüger, P. U.E. Onyisi, J. R. Patterson, D. Peterson, J. Pivarski, D. Riley, A. Ryd, A. J. Sadoff, H. Schwarthoff, X. Shi, S. Stroiney, W. M. Sun, T. Wilksen, M. Weinberger, S. B. Athar, R. Patel, V. Potlia, J. Yelton, P. Rubin, C. Cawlfield, B. I. Eisenstein, I. Karliner, D. Kim, N. Lowrey, P. Naik, C. Sedlack, M. Selen, E. J. White, J. Wiss, M. R. Shepherd, D. Besson, T. K. Pedlar, D. Cronin-Hennessy, K. Y. Gao, D. T. Gong, J. Hietala, Y. Kubota, T. Klein, B. W. Lang, R. Poling, A. W. Scott, A. Smith, P. Zweber, S. Dobbs, Z. Metreveli, K. K. Seth, A. Tomaradze, J. Ernst, H. Severini, S. A. Dytman, W. Love, V. Savinov, O. Aquines, Z. Li, A. Lopez, S. Mehrabyan, H. Mendez, J. Ramirez

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44 Scopus citations


Knowledge of the Bs decay fraction of the Υ(5S) resonance, fS, is important for Bs meson studies at the Υ(5S) energy. Using a data sample collected by the CLEO III detector at CESR consisting of 0.423fb-1 on the Υ(5S) resonance, 6.34fb-1 on the Υ(4S) and 2.32fb-1 in the continuum below the Υ(4S), we measure B(Υ(5S)→ X)=(13.8±0.7-1.5+2.3) % and B(Υ(4S)→ X)=(7.1±0.1±0.6)%; the ratio of the two rates is (1.9±0.1-0.2+0.3). This is the first measurement of the meson yield from the Υ(5S). Using these rates, and a model dependent estimate of B(Bs→ X), we determine fS=(24.6±2.9-5.3+11.0)%. We also update our previous independent measurement of fS made using the inclusive Ds yields to now be (16.8±2.6-3.4+6.7)%, due to a better estimate of the number of hadronic events. We also report the total Υ(5S) hadronic cross section above continuum to be σ(e+e-→Υ(5S))=(0.301±0. 002±0.039)nb. This allows us to extract the fraction of B mesons as (58.9±10.0±9.2)%, equal to 1-fS. Averaging the three methods gives a model dependent result of fS=(21-3+6)%.

Original languageEnglish (US)
Article number012002
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number1
StatePublished - 2007

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)


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