Observation of eta'c production in gammagamma fusion at CLEO. Academic Article uri icon

abstract

  • We report on the observation of the eta(')(c)(2(1)S0), the radial excitation of the eta(c)(1(1)S0) ground state of charmonium, in the two-photon fusion reaction gammagamma-->eta(')(c)-->K(0)(S)K+/-pi(-/+) in 13.6 fb(-1) of CLEO II/II.V data and 13.1 fb(-1) of CLEO III data. We obtain M(eta(')(c))=3642.9+/-3.1(stat)+/-1.5(syst) MeV and M(eta(c))=2981.8+/-1.3(stat)+/-1.5(syst) MeV. The corresponding values of hyperfine splittings between 1S0 and 3S1 states are DeltaM(hf)(1S)=115.1+/-2.0 MeV and DeltaM(hf)(2S)=43.1+/-3.4 MeV. Assuming that the eta(c) and eta(')(c) have equal branching fractions to K(S)Kpi, we obtain Gamma(gammagamma)(eta(')(c))=1.3+/-0.6 keV.

published proceedings

  • Phys Rev Lett

author list (cited authors)

  • Asner, D. M., Dytman, S. A., Mehrabyan, S., Mueller, J. A., Nam, S., Savinov, V., ... CLEO Collaboration.

citation count

  • 85

complete list of authors

  • Asner, DM||Dytman, SA||Mehrabyan, S||Mueller, JA||Nam, S||Savinov, V||Huang, GS||Miller, DH||Pavlunin, V||Sanghi, B||Shibata, EI||Shipsey, IPJ||Adams, GS||Chasse, M||Cummings, JP||Danko, I||Napolitano, J||Cronin-Hennessy, D||Park, CS||Park, W||Thayer, JB||Thorndike, EH||Coan, TE||Gao, YS||Liu, F||Stroynowski, R||Artuso, M||Boulahouache, C||Blusk, S||Butt, J||Dambasuren, E||Dorjkhaidav, O||Haynes, J||Menaa, N||Mountain, R||Muramatsu, H||Nandakumar, R||Redjimi, R||Sia, R||Skwarnicki, T||Stone, S||Wang, JC||Zhang, Kevin||Mahmood, AH||Csorna, SE||Bonvicini, G||Cinabro, D||Dubrovin, M||Bornheim, A||Lipeles, E||Pappas, SP||Shapiro, A||Weinstein, AJ||Mahapatra, R||Nelson, HN||Briere, RA||Chen, GP||Ferguson, T||Tatishvili, G||Vogel, H||Watkins, ME||Adam, NE||Alexander, JP||Berkelman, K||Boisvert, V||Cassel, DG||Duboscq, JE||Ecklund, KM||Ehrlich, R||Galik, RS||Gibbons, L||Gittelman, B||Gray, SW||Hartill, DL||Heltsley, BK||Hsu, L||Jones, CD||Kandaswamy, J||Kreinick, DL||Kuznetsov, VE||Magerkurth, A||Mahlke-Krüger, H||Meyer, TO||Patterson, JR||Pedlar, TK||Peterson, D||Pivarski, J||Riley, D||Sadoff, AJ||Schwarthoff, H||Shepherd, MR||Sun, WM||Thayer, JG||Urner, D||Wilksen, T||Weinberger, M||Athar, SB||Avery, P||Breva-Newell, L||Potlia, V||Stoeck, H||Yelton, J||Eisenstein, BI||Gollin, GD||Karliner, I||Lowrey, N||Naik, P||Sedlack, C||Selen, M||Thaler, JJ||Williams, J||Edwards, KW||Besson, D||Gao, KY||Gong, DT||Kubota, Y||Li, SZ||Poling, R||Scott, AW||Smith, A||Stepaniak, CJ||Urheim, J||Metreveli, Z||Seth, KK||Tomaradze, A||Zweber, P||Arms, K||Eckhart, E||Gan, KK||Gwon, C||Severini, H||Skubic, P

publication date

  • April 2004