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Article
Peer Reviewed

Measurement of γγ widths of charmonium states

Chen, W-Y;
McIlwain, RL;
Miller, DH;
Ng, CR;
Schaffner, SF;
Shibata, EI;
Yao, W-M;
Sparks, K;
Thorndike, EH;
Wang, C-H;
Alam, MS;
Kim, IJ;
Li, WC;
Lou, XC;
Sun, CR;
Wang, P-N;
Zoeller, MI;
Bortoletto, D;
Goldberg, M;
Horwitz, N;
Jain, V;
Mestayer, MD;
Moneti, GC;
Sharma, V;
Shipsey, IPJ;
Skwarnicki, T;
Thulasidas, M;
Csorna, SE;
Letson, T;
Alexander, J;
Artuso, M;
Bebek, C;
Berkelman, K;
Cassel, DG;
Cheu, E;
Coffman, DM;
Crawford, G;
DeWire, JW;
Dell, PS;
Ehrlich, R;
Galik, RS;
Gittlman, B;
Gray, SW;
Halling, AM;
Hartill, DL;
Heltsley, BK;
Kandaswamy, J;
Katayama, N;
Kreinick, DL;
Lewis, JD;
Mistry, NB;
Mueller, J;
Namjoshi, R;
Nandi, S;
Nordberg, E;
O'Grady, C;
Peterson, D;
Pisharody, M;
Riley, D;
Sapper, M;
Silverman, A;
Stone, S;
Worden, H;
Worris, M;
Sadoff, AJ;
Avery, P;
Besson, D;
Garren, L;
Yelton, J;
Bowcock, T;
Kinoshita, K;
Pipkin, FM;
Procario, M;
Wilson, Richard;
Wolinski, J;
Xiao, D;
Ammar, R;
Baringer, P;
Coppage, D;
Haas, P;
Lam, Ha;
Jawahery, A;
Park, CH;
Kubota, Y;
Nelson, JK;
Perticone, D;
Poling, R;
Fulton, R;
Hempstead, M;
Jensen, T;
Johnson, DR;
Kagan, H;
Kass, R;
Morrow, F;
Whitmore, J;
Wilson, P

LBL Publications (1990)

Using the CLEO detector at the Cornell Electron Storage Ring, we have searched for two-photon production of charmonium in four-track final states. We have measured Γγγ(ηc)=5.9+2.1-1.8±1.9 keV, and we have obtained 95% CL upper limits of Γγγ(Xc0)<6.2 keV and Γγγ(Xc2)<1.0 keV. © 1990.