Abstract
Knowledge of the B-s decay fraction of the Upsilon(5S) resonance, f(S), is important for B-s meson studies at the Upsilon(5S) energy. Using a data sample collected by the CLEO III detector at CESR consisting of 0.423 fb(-1) on the Upsilon(5S) resonance, 6.34 fb(-1) on the Upsilon(4S) and 2.32 fb(-1) in the continuum below the Upsilon(4S), we measure B(Upsilon(5S)->phi X)=(13.8 +/- 0.7(-1.5)(+2.3))% and B(Upsilon(4S)->phi 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 phi meson yield from the Upsilon(5S). Using these rates, and a model dependent estimate of B(B-s ->phi X), we determine f(S)=(24.6 +/- 2.9(-5.3)(+11.0))%. We also update our previous independent measurement of f(S) made using the inclusive D-s 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 Upsilon(5S) hadronic cross section above continuum to be sigma(e(+)e(-)->Upsilon(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-f(S). Averaging the three methods gives a model dependent result of f(S)=(21(-3)(+6))%.
Published in:
Physical Review D 75,1 (2007)
Link to original published article:
http://dx.doi.org/10.1103/PhysRevD.75.012002
Keywords
Astronomy & Astrophysics;; Physics, Particles & Fields
Date of Version
January 2007
Recommended Citation
Huang, G. S.; Miller, D. H.; Pavlunin, V.; Sanghi, B.; Shipsey, I. P. J.; Xin, B.; Adams, G. S.; Anderson, M.; Cummings, J. P.; Danko, I.; Napolitano, J.; He, Q.; Insler, J.; Muramatsu, H.; Park, C. S.; Thorndike, E. H.; Yang, F.; Coan, T. E.; Gao, Y. S.; Liu, F.; Artuso, M.; Blusk, S.; Butt, J.; Li, J.; Menaa, N.; Mountain, R.; Nisar, S.; Randrianarivony, K.; Redjimi, R.; Sia, R.; Skwarnicki, T.; Stone, S.; Wang, J. C.; Zhang, K.; Csorna, S. E.; Bonvicini, G.; Cinabro, D.; Dubrovin, M.; Lincoln, A.; Asner, D. M.; Edwards, K. W.; Briere, R. A.; Brock, I.; Chen, J.; Ferguson, T.; Tatishvili, G.; Vogel, H.; Watkins, M. E.; Rosner, J. L.; Adam, N. E.; Alexander, J. P.; Berkelman, K.; Cassel, D. G.; Duboscq, J. E.; Ecklund, K. M.; Ehrlich, R.; Fields, L.; Gibbons, L.; Gray, R.; Gray, S. W.; Hartill, D. L.; Heltsley, B. K.; Hertz, D.; Jones, C. D.; Kandaswamy, J.; Kreinick, D. L.; Kuznetsov, V. E.; Mahlke-Kruger, H.; Onyisi, P. U. E.; Patterson, J. R.; Peterson, D.; Pivarski, J.; Riley, D.; Ryd, A.; Sadoff, A. J.; Schwarthoff, H.; Shi, X.; Stroiney, S.; Sun, W. M.; Wilksen, T.; Weinberger, M.; Athar, S. B.; Patel, R.; Potlia, V.; Yelton, J.; Rubin, P.; Cawlfield, C.; Eisenstein, B. I.; Karliner, I.; Kim, D.; Lowrey, N.; Naik, P.; Sedlack, C.; Selen, M.; White, E. J.; Wiss, J.; Shepherd, M. R.; Besson, D.; Pedlar, T. K.; Cronin-Hennessy, D.; Gao, K. Y.; Gong, D. T.; Hietala, J.; Kubota, Y.; Klein, T.; Lang, B. W.; Poling, R.; Scott, A. W.; Smith, A.; Zweber, P.; Dobbs, S.; Metreveli, Z.; Seth, K. K.; Tomaradze, A.; Ernst, J.; Severini, H.; Dytman, S. A.; Love, W.; Savinov, V.; Aquines, O.; Li, Z.; Lopez, A.; Mehrabyan, S.; Mendez, H.; and Ramirez, J., "Measurement of B(Upsilon(5S)-> B-s((*))(B)over-bar(s)((*))) using phi mesons" (2007). Department of Physics and Astronomy Faculty Publications. Paper 806.
https://docs.lib.purdue.edu/physics_articles/806