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, M. Artuso, S. Blusk, S. Khalil, R. Mountain, K. Randrianarivony, T. Skwarnicki, S. 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

Research output: Contribution to journalArticle

36 Scopus citations

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 - Particles, Fields, Gravitation and Cosmology
Volume79
Issue number11
DOIs
StatePublished - Jun 5 2009

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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    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 - Particles, Fields, Gravitation and Cosmology, 79(11), [111101]. https://doi.org/10.1103/PhysRevD.79.111101