Observation of η′ decays to π+π-π0 and π+π-e+e-

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

Research output: Contribution to journalArticle

32 Scopus citations


Using ψ(2S)→π+π-J/ψ, J/ψ→γη′ events acquired with the CLEO-c detector at the CESR e+e- collider, we make the first observations of the decays η′→π+π-π0 and η′→π+π-e+e-, measuring absolute branching fractions (37-9+11±4)×10-4 and (25-9+12±5)×10-4, respectively. For η′→π+π-π0, this result probes the mechanism of isospin violation and the roles of π0/η/η′-mixing and final state rescattering in strong decays. We also set upper limits on branching fractions for η′ decays to π+π-μ+μ-, 2(π+π-), π+π-2π0, 2(π+π-)π0, 3(π+π-), and invisible final states.

Original languageEnglish (US)
Article number061801
JournalPhysical Review Letters
Issue number6
StatePublished - Feb 11 2009

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Observation of η′ decays to π+π-π0 and π+π-e+e-'. Together they form a unique fingerprint.

  • Cite this

    Naik, P., Rademacker, J., Asner, D. M., Edwards, K. W., Reed, J., Robichaud, A. N., Tatishvili, G., Briere, R. A., Vogel, H., Onyisi, P. U. E., Rosner, J. L., Alexander, J. P., Cassel, D. G., Duboscq, J. E., Ehrlich, R., Fields, L., Galik, R. S., Gibbons, L., Gray, R., ... Ecklund, K. M. (2009). Observation of η′ decays to π+π-π0 and π+π-e+e-. Physical Review Letters, 102(6), [061801]. https://doi.org/10.1103/PhysRevLett.102.061801