Upper Limits for the Production of Light Short-Lived Neutral Particles in Radiative ϒ decay
1986; American Physical Society; Volume: 56; Issue: 25 Linguagem: Inglês
10.1103/physrevlett.56.2676
ISSN1092-0145
AutoresT. J. V. Bowcock, R. T. Giles, J. Hassard, K. Kinoshita, F. M. Pipkin, Richard Wilson, T. Gentile, Peter J. Haas, M. Hempstead, T. Jensen, H. Kagan, R. Kass, S. Behrends, Jan M. Guida, J. A. Guida, F. Morrow, R. Poling, C. Rosenfeld, E. H. Thorndike, P. Tipton, J. Green, F. Sannes, R. Stone, M. S. Alam, N. Katayama, I. J. Kim, C. R. Sun, V. Tanikella, D. Bortoletto, A. Chen, L. Garren, M. Goldberg, N. Horwitz, A. Jawahery, P. Lubrano, G. C. Moneti, S. E. Csorna, M. D. Mestayer, R. S. Panvini, G. B. Word, A. Bean, G. J. Bobbink, I. Brock, A. Engler, T. Ferguson, R.W. Kraemer, C. Rippich, R.B. Sutton, H. Vogel, C. Bebek, K. Berkelman, E. Blücher, 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. F. Read, D. Riley, A. Silverman, P. C. Stein, S. Stone, Xia Yi, A. J. Sadoff, P. Avery, D. Besson,
Tópico(s)Particle Detector Development and Performance
ResumoWe have searched for the exclusive decay of the $\ensuremath{\Upsilon}(1S)$ into a photon and a short-lived spin-0 particle, $a$, decaying into ${e}^{+}{e}^{\ensuremath{-}}$, using the CLEO detector at the Cornell Electron Storage Ring. Upper limits for the product branching ratio $B(\ensuremath{\Upsilon}(1S)\ensuremath{\rightarrow}\ensuremath{\gamma}a)B(a\ensuremath{\rightarrow}{e}^{+}{e}^{\ensuremath{-}})$ are established for a range of masses, $2{m}_{e}<{m}_{a}<2{m}_{\ensuremath{\mu}}$.
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