Photon transitions in ψ(2S) decays to χ cJ(1P) and η c(1S)

S. B. Athar, P. Avery, L. Breva-Newell, R. Patel, V. Potlia, H. Stoeck, J. Yelton, P. Rubin, C. Cawlfield, B. I. Eisenstein, G. D. Gollin, I. Karliner, D. Kim, N. Lowrey, P. Naik, C. Sedlack, M. Selen, J. J. Thaler, J. Williams, J. WissK. W. Edwards, D. Besson, K. Y. Gao, D. T. Gong, Y. Kubota, B. W. Lang, S. Z. Li, R. Poling, A. W. Scott, A. Smith, C. J. Stepaniak, J. Urheim, Z. Metreveli, K. K. Seth, A. Tomaradze, P. Zweber, J. Ernst, A. H. Mahmood, H. Severini, D. M. Asner, S. A. Dytman, S. Mehrabyan, J. A. Mueller, V. Savinov, Z. Li, A. Lopez, H. Mendez, J. Ramirez, G. S. Huang, D. H. Miller, V. Pavlunin, B. Sanghi, E. I. Shibata, I. P.J. Shipsey, G. S. Adams, M. Chasse, M. Cravey, J. P. Cummings, I. Danko, J. Napolitano, D. Cronin-Hennessy, C. S. Park, W. Park, J. B. Thayer, E. H. Thorndike, T. E. Coan, Y. S. Gao, F. Liu, M. Artuso, C. Boulahouache, S. Blusk, J. Butt, E. Dambasuren, O. Dorjkhaidav, N. Menaa, R. Mountain, H. Muramatsu, R. Nandakumar, R. Redjimi, R. Sia, T. Skwarnicki, S. Stone, J. C. Wang, K. Zhang, S. E. Csorna, G. Bonvicini, D. Cinabro, M. Dubrovin, R. A. Briere, G. P. Chen, T. Ferguson, G. Tatishvili, H. Vogel, M. E. Watkins, N. E. Adam, J. P. Alexander, K. Berkelman, D. G. Cassel, J. E. Duboscq, K. M. Ecklund, R. Ehrlich, L. Fields, R. S. Galik, L. Gibbons, B. Gittelman, R. Gray, S. W. Gray, D. L. Hartill, B. K. Heltsley, D. Hertz, L. Hsu, C. D. Jones, J. Kandaswamy, D. L. Kreinick, V. E. Kuznetsov, H. Mahlke-Krüger, T. O. Meyer, P. U.E. Onyisi, J. R. Patterson, D. Peterson, J. Pivarski, D. Riley, J. L. Rosner, A. Ryd, A. J. Sadoff, H. Schwarthoff, M. R. Shepherd, W. M. Sun, J. G. Thayer, D. Urner, T. Wilksen, M. Weinberger

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Abstract

We have studied the inclusive photon spectrum in ψ(2S) decays using the CLEO III detector. We present the most precise measurements of electric dipole (E1) photon transition rates for ψ(25) → γχ eJ(1P) (J = 0, 1, 2). We also confirm the hindered magnetic dipole (M1) transition, ψ(2S) → γη c(1S). However, the direct M1 transition ψ(2S) → γη c(2S) observed by the Crystal Ball as a narrow peak at a photon energy of 91 McV is not found in our data.

Original languageEnglish (US)
Article number112002
Pages (from-to)112002-1-112002-6
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume70
Issue number11
DOIs
StatePublished - Dec 1 2004

ASJC Scopus subject areas

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

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    Athar, S. B., Avery, P., Breva-Newell, L., Patel, R., Potlia, V., Stoeck, H., Yelton, J., Rubin, P., Cawlfield, C., Eisenstein, B. I., Gollin, G. D., Karliner, I., Kim, D., Lowrey, N., Naik, P., Sedlack, C., Selen, M., Thaler, J. J., Williams, J., ... Weinberger, M. (2004). Photon transitions in ψ(2S) decays to χ cJ(1P) and η c(1S). Physical Review D - Particles, Fields, Gravitation and Cosmology, 70(11), 112002-1-112002-6. [112002]. https://doi.org/10.1103/PhysRevD.70.112002