Phys. Rev. D
75,
031104(R)
(2007)
[6 pages]
Search for invisible decays of the Υ(1S) resonance
P. Rubin et al. CLEO Collaboration
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P. Rubin1, C. Cawlfield2, B. I. Eisenstein2, I. Karliner2, D. Kim2, N. Lowrey2, P. Naik2, M. Selen2, E. J. White2, J. Wiss2, R. E. Mitchell3, M. R. Shepherd3, D. Besson4, T. K. Pedlar5, D. Cronin-Hennessy6, K. Y. Gao6, J. Hietala6, Y. Kubota6, T. Klein6, B. W. Lang6, R. Poling6, A. W. Scott6, A. Smith6, P. Zweber6, S. Dobbs7, Z. Metreveli7, K. K. Seth7, A. Tomaradze7, J. Ernst8, K. M. Ecklund9, H. Severini10, W. Love11, V. Savinov11, O. Aquines12, Z. Li12, A. Lopez12, S. Mehrabyan12, H. Mendez12, J. Ramirez12, G. S. Huang13, D. H. Miller13, V. Pavlunin13, B. Sanghi13, I. P. J. Shipsey13, B. Xin13, G. S. Adams14, M. Anderson14, J. P. Cummings14, I. Danko14, D. Hu14, B. Moziak14, J. Napolitano14, Q. He15, J. Insler15, H. Muramatsu15, C. S. Park15, E. H. Thorndike15, F. Yang15, T. E. Coan16, Y. S. Gao16, M. Artuso17, S. Blusk17, J. Butt17, J. Li17, N. Menaa17, R. Mountain17, S. Nisar17, K. Randrianarivony17, R. Sia17, T. Skwarnicki17, S. Stone17, J. C. Wang17, K. Zhang17, G. Bonvicini18, D. Cinabro18, M. Dubrovin18, A. Lincoln18, D. M. Asner19, K. W. Edwards19, R. A. Briere20, T. Ferguson20, G. Tatishvili20, H. Vogel20, M. E. Watkins20, J. L. Rosner21, N. E. Adam22, J. P. Alexander22, D. G. Cassel22, J. E. Duboscq22, R. Ehrlich22, L. Fields22, R. S. Galik22, L. Gibbons22, R. Gray22, S. W. Gray22, D. L. Hartill22, B. K. Heltsley22, D. Hertz22, C. D. Jones22, J. Kandaswamy22, D. L. Kreinick22, V. E. Kuznetsov22, H. Mahlke-Krüger22, P. U. E. Onyisi22, J. R. Patterson22, D. Peterson22, J. Pivarski22, D. Riley22, A. Ryd22, A. J. Sadoff22, H. Schwarthoff22, X. Shi22, S. Stroiney22, W. M. Sun22, T. Wilksen22, S. B. Athar23, R. Patel23, V. Potlia23, and J. Yelton23 (CLEO Collaboration)
1George Mason University, Fairfax, Virginia 22030, USA
2University of Illinois, Urbana-Champaign, Illinois 61801, USA
3Indiana University, Bloomington, Indiana 47405, USA
4University of Kansas, Lawrence, Kansas 66045, USA
5Luther College, Decorah, Iowa 52101, USA
6University of Minnesota, Minneapolis, Minnesota 55455, USA
7Northwestern University, Evanston, Illinois 60208, USA
8State University of New York at Albany, Albany, New York 12222, USA
9State University of New York at Buffalo, Buffalo, New York 14260, USA
10University of Oklahoma, Norman, Oklahoma 73019, USA
11University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
12University of Puerto Rico, Mayaguez, Puerto Rico 00681
13Purdue University, West Lafayette, Indiana 47907, USA
14Rensselaer Polytechnic Institute, Troy, New York 12180, USA
15University of Rochester, Rochester, New York 14627, USA
16Southern Methodist University, Dallas, Texas 75275, USA
17Syracuse University, Syracuse, New York 13244, USA
18Wayne State University, Detroit, Michigan 48202, USA
19Carleton University, Ottawa, Ontario, Canada K1S 5B6
20Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
21Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA
22Cornell University, Ithaca, New York 14853, USA
23University of Florida, Gainesville, Florida 32611, USA
Received 21 December 2006; published 9 February 2007
We present a measurement of the branching fraction of invisible Υ(1S) decays, using 1.2 fb-1 of data collected at the Υ(2S) resonance with the CLEO III detector at CESR. After subtracting expected backgrounds from events that pass selection criteria for invisible Υ(1S) decay in Υ(2S)→π+π-Υ(1S), we deduce a 90% C.L. upper limit of B[Υ(1S)→invisible]<0.39%.
© 2007 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.75.031104
DOI:
10.1103/PhysRevD.75.031104
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