Phys. Rev. Lett.
96,
022002
(2006)
[5 pages]
Observation of Bs Production at the Υ(5S) Resonance
G. Bonvicini et al. CLEO Collaboration
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G. Bonvicini1, D. Cinabro1, M. Dubrovin1, A. Lincoln1, A. Bornheim2, S. P. Pappas2, A. J. Weinstein2, D. M. Asner3, K. W. Edwards3, R. A. Briere4, G. P. Chen4, J. Chen4, T. Ferguson4, G. Tatishvili4, H. Vogel4, M. E. Watkins4, J. L. Rosner5, N. E. Adam6, J. P. Alexander6, K. Berkelman6, D. G. Cassel6, V. Crede6, J. E. Duboscq6, K. M. Ecklund6, R. Ehrlich6, L. Fields6, L. Gibbons6, B. Gittelman6, R. Gray6, S. W. Gray6, D. L. Hartill6, B. K. Heltsley6, D. Hertz6, C. D. Jones6, J. Kandaswamy6, D. L. Kreinick6, V. E. Kuznetsov6, H. Mahlke-Krüger6, T. O. Meyer6, P. U. E. Onyisi6, J. R. Patterson6, D. Peterson6, E. A. Phillips6, J. Pivarski6, D. Riley6, A. Ryd6, A. J. Sadoff6, H. Schwarthoff6, X. Shi6, M. R. Shepherd6, S. Stroiney6, W. M. Sun6, D. Urner6, T. Wilksen6, K. M. Weaver6, M. Weinberger6, S. B. Athar7, P. Avery7, L. Breva-Newell7, R. Patel7, V. Potlia7, H. Stoeck7, J. Yelton7, P. Rubin8, C. Cawlfield9, B. I. Eisenstein9, G. D. Gollin9, I. Karliner9, D. Kim9, N. Lowrey9, P. Naik9, C. Sedlack9, M. Selen9, E. J. White9, J. Williams9, J. Wiss9, D. Besson10, T. K. Pedlar11, D. Cronin-Hennessy12, K. Y. Gao12, D. T. Gong12, J. Hietala12, Y. Kubota12, T. Klein12, B. W. Lang12, S. Z. Li12, R. Poling12, A. W. Scott12, A. Smith12, S. Dobbs13, Z. Metreveli13, K. K. Seth13, A. Tomaradze13, P. Zweber13, J. Ernst14, K. Arms15, H. Severini16, S. A. Dytman17, W. Love17, S. Mehrabyan17, J. A. Mueller17, V. Savinov17, Z. Li18, A. Lopez18, H. Mendez18, J. Ramirez18, G. S. Huang19, D. H. Miller19, V. Pavlunin19, B. Sanghi19, I. P. J. Shipsey19, G. S. Adams20, M. Anderson20, J. P. Cummings20, I. Danko20, J. Napolitano20, Q. He21, H. Muramatsu21, C. S. Park21, E. H. Thorndike21, T. E. Coan22, Y. S. Gao22, F. Liu22, Y. Maravin22, M. Artuso23, C. Boulahouache23, S. Blusk23, J. Butt23, O. Dorjkhaidav23, J. Li23, N. Menaa23, R. Mountain23, R. Nandakumar23, K. Randrianarivony23, R. Redjimi23, R. Sia23, T. Skwarnicki23, S. Stone23, J. C. Wang23, K. Zhang23, and S. E. Csorna24 (CLEO Collaboration)
1Wayne State University, Detroit, Michigan 48202, USA
2California Institute of Technology, Pasadena, California 91125, USA
3Carleton University, Ottawa, Ontario, Canada K1S 5B6
4Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
5Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA
6Cornell University, Ithaca, New York 14853, USA
7University of Florida, Gainesville, Florida 32611, USA
8George Mason University, Fairfax, Virginia 22030, USA
9University of Illinois, Urbana-Champaign, Illinois 61801, USA
10University of Kansas, Lawrence, Kansas 66045, USA
11Luther College, Decorah, Iowa 52101, USA
12University of Minnesota, Minneapolis, Minnesota 55455, USA
13Northwestern University, Evanston, Illinois 60208, USA
14State University of New York at Albany, Albany, New York 12222, USA
15The Ohio State University, Columbus, Ohio 43210, USA
16University of Oklahoma, Norman, Oklahoma 73019, USA
17University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
18University of Puerto Rico, Mayaguez, Puerto Rico 00681
19Purdue University, West Lafayette, Indiana 47907, USA
20Rensselaer Polytechnic Institute, Troy, New York 12180, USA
21University of Rochester, Rochester, New York 14627, USA
22Southern Methodist University, Dallas, Texas 75275, USA
23Syracuse University, Syracuse, New York 13244, USA
24Vanderbilt University, Nashville, Tennessee 37235, USA
Received 12 October 2005; published 18 January 2006
Using the CLEO detector at the Cornell Electron Storage Ring, we have observed the Bs meson in e+e- annihilation at the Υ(5S) resonance. We find 14 candidates consistent with Bs decays into final states with a J/ψ or a Ds(*)-. The probability that we have observed a background fluctuation is less than 8×10-10. We have established that at the energy of the Υ(5S) resonance Bs production proceeds predominantly through the creation of Bs*B̅ s* pairs. We find σ(e+e-→Bs*B̅ s*)=[0.11-0.03+0.04(stat)±0.02(syst)] nb, and set the following limits: σ(e+e-→BsB̅ s)/σ(e+e-→Bs*B̅ s*)<0.16 and [σ(e+e-→BsB̅ s*)+σ(e+e-→Bs*B̅ s)]/σ(e+e-→Bs*B̅ s*)<0.16 (90% C.L.). The mass of the Bs* meson is measured to be MBs*=[5.414±0.001(stat)±0.003(syst)] GeV/c2.
© 2006 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.96.022002
DOI:
10.1103/PhysRevLett.96.022002
PACS:
13.20.He, 13.25.Gv, 13.25.Hw, 13.66.Bc
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