Phys. Rev. Lett.
56,
2676–2679
(1986)
Upper Limits for the Production of Light Short-Lived Neutral Particles in Radiative ϒ decay
T. Bowcock et al.
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T. Bowcock, R. T. Giles, J. Hassard*, K. Kinoshita, F. M. Pipkin, and Richard Wilson
Harvard University, Cambridge, Massachusetts 02138
T. Gentile, P. Haas, M. Hempstead, T. Jensen, H. Kagan, and R. Kass
Ohio State University, Columbus, Ohio 43210
S. Behrends, Jan M. Guida, Joan A. Guida, F. Morrow, R. Poling, C. Rosenfeld†, E. H. Thorndike, and P. Tipton
University of Rochester, Rochester, New York 14627
J. Green, F. Sannes, and R. Stone
Rutgers University, New Brunswick, New Jersey 08854
M. S. Alam, N. Katayama, I. J. Kim, C. R. Sun, and V. Tanikella
State University of New York at Albany, Albany, New York 12222
D. Bortoletto, A. Chen, L. Garren, M. Goldberg, N. Horwitz, A. Jawahery, P. Lubrano, and G. C. Moneti
Syracuse University, Syracuse, New York 13210
S. E. Csorna, M. D. Mestayer, R. S. Panvini, and G. B. Word
Vanderbilt University, Nashville, Tennessee 37235
A. Bean, G. J. Bobbink, I. Brock, A. Engler, T. Ferguson, R. Kraemer, C. Rippich, R. Sutton, and H. Vogel
Carnegie-Mellon University, Pittsburgh, Pennsylvania 15213
C. Bebek, K. Berkelman, E. Blucher, D. G. Cassel, T. Copie, R. DeSalvo, J. W. DeWire, R. Ehrlich, R. S. Galik, M. G. D. Gilchriese, B. Gittelman, S. W. Gray, A. M. Halling, D. L. Hartill, B. K. Heltsley, S. Holzner, M. Ito, J. Kandaswamy, R. Kowalewski, D. L. Kreinick, Y. Kubota, N. B. Mistry, J. Mueller, R. Namjoshi, E. Nordberg, M. Ogg, D. Peterson, D. Perticone, M. Pisharody, K. Read, D. Riley, A. Silverman, P. C. Stein, S. Stone, and Xia Yi‡
Cornell University, Ithaca, New York 14853
A. J. Sadoff
Ithaca College, Ithaca, New York 14850
P. Avery and D. Besson
University of Florida, Gainesville, Florida 31611
Received 28 February 1986; published in the issue dated 23 June 1986
We have searched for the exclusive decay of the ϒ(1S) into a photon and a short-lived spin-0 particle, a, decaying into e+e-, using the CLEO detector at the Cornell Electron Storage Ring. Upper limits for the product branching ratio B(ϒ(1S)→γa)B(a→e+e-) are established for a range of masses, 2me<ma<2mμ.
© 1986 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.56.2676
DOI:
10.1103/PhysRevLett.56.2676
*Present address: Department of Physics, Imperial College, Blackett Laboratory, Prince Consort Rd., London SW7 2AZ, U.K. †Present address: Department of Physics and Astronomy, Louisiana State University, Baton Rouge, La. 70803. ‡Present address: Department of Physics, Carnegie-Mellon University, Pittsburgh, Pa. 15213.
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