Charmonium decays to γπ0, γη, and γη′

T. K. Pedlar, J. Xavier, D. Cronin-Hennessy, K. Y. Gao, J. Hietala, T. Klein, R. Poling, P. Zweber, S. Dobbs, Z. Metreveli, K. K. Seth, B. J Y Tan, A. Tomaradze, J. Libby, L. Martin, A. Powell, C. Thomas, G. Wilkinson, H. Mendez, J. Y. GeD. H. Miller, I. P J Shipsey, B. Xin, G. S. Adams, D. Hu, B. Moziak, J. Napolitano, K. M. Ecklund, Q. He, J. Insler, H. Muramatsu, C. S. Park, E. H. Thorndike, F. Yang, Marina Artuso, Steven Roy Blusk, S. Khalil, R. Mountain, K. Randrianarivony, Tomasz Skwarnicki, Sheldon Stone, J. C. Wang, L. M. Zhang, G. Bonvicini, D. Cinabro, M. Dubrovin, A. Lincoln, M. J. Smith, P. Zhou, J. Zhu, P. Naik, J. Rademacker, D. M. Asner, K. W. Edwards, J. Reed, A. N. Robichaud, G. Tatishvili, E. J. White, R. A. Briere, H. Vogel, P. U E Onyisi, J. L. Rosner, J. P. Alexander, D. G. Cassel, R. Ehrlich, L. Fields, R. S. Galik, L. Gibbons, R. Gray, S. W. Gray, D. L. Hartill, B. K. Heltsley, D. Hertz, J. M. Hunt, J. Kandaswamy, D. L. Kreinick, V. E. Kuznetsov, J. Ledoux, H. Mahlke-Krüger, J. R. Patterson, D. Peterson, D. Riley, A. Ryd, A. J. Sadoff, X. Shi, S. Stroiney, W. M. Sun, T. Wilksen, J. Yelton, P. Rubin, N. Lowrey, S. Mehrabyan, M. Selen, J. Wiss, M. Kornicer, R. E. Mitchell, M. R. Shepherd, C. Tarbert, D. Besson

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Abstract

Using data acquired with the CLEO-c detector at the CESR e+e- collider, we measure branching fractions for J/ψ, ψ(2S), and ψ(3770) decays to γπ0, γη, and γη′. Defining Rn B[ψ(nS)→γη]/B[ψ(nS)→γη′], we obtain R1=(21.1±0.9)% and, unexpectedly, an order of magnitude smaller limit, R2<1.8% at 90% C.L. We also use J/ψ→γη′ events to determine branching fractions of improved precision for the five most copious η′ decay modes.

Original languageEnglish (US)
Article number111101
JournalPhysical Review D
Volume79
Issue number11
DOIs
StatePublished - Jun 5 2009

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Pedlar, T. K., Xavier, J., Cronin-Hennessy, D., Gao, K. Y., Hietala, J., Klein, T., Poling, R., Zweber, P., Dobbs, S., Metreveli, Z., Seth, K. K., Tan, B. J. Y., Tomaradze, A., Libby, J., Martin, L., Powell, A., Thomas, C., Wilkinson, G., Mendez, H., ... Besson, D. (2009). Charmonium decays to γπ0, γη, and γη′. Physical Review D, 79(11), [111101]. https://doi.org/10.1103/PhysRevD.79.111101