Charmonium Decays of Y(4260), psi(4160), and psi(4040).

/ Authors

T. Coan, Y. Gao, F. Liu, M. Artuso, S. Blusk, J. Butt, J. Li, N. Menaa, R. Mountain, S. Nisar

and 121 more authors

K. Randrianarivony, R. Redjimi, R. Sia, T. Skwarnicki, S. Stone, J. Wang, K. Zhang, S. Csorna, G. Bonvicini, D. Cinabro, M. Dubrovin, A. Lincoln, D. Asner, K. Edwards, R. A. Briere, I. Brock, I. Brock, J. Chen, T. Ferguson, G. Tatishvili, H. Vogel, M. E. Watkins, J. Rosner, N. Adam, J. Alexander, K. Berkelman, D. Cassel, J. Duboscq, K. Ecklund, R. Ehrlich, L. Fields, R. Galik, L. Gibbons, R. Gray, S. Gray, D. Hartill, B. Heltsley, D. Hertz, C. Jones, J. Kandaswamy, D. Kreinick, V. Kuznetsov, H. Mahlke-Krüger, T. Meyer, P. Onyisi, J. Patterson, D. Peterson, E. A. Phillips, J. Pivarski, D. Riley, A. Ryd, A. Sadoff, H. Schwarthoff, X. Shi, S. Stroiney, W. Sun, T. Wilksen, M. Weinberger, S. Athar, P. Avery, L. Breva-Newell, R. Patel, V. Potlia, H. Stoeck, J. Yelton, P. Rubin, C. Cawlfield, B. Eisenstein, I. Karliner, Doseok Kim, N. Lowrey, P. Naik, C. Sedlack, M. Selen, E. White, J. Wiss, M. Shepherd, D. Besson, T. Pedlar, D. Cronin-Hennessy, K. Gao, D. Gong, J. Hietala, Y. Kubota, T. Klein, B. Lang, R. Poling, A. Scott, A. Smith, S. Dobbs, Z. Metreveli, K. Seth, A. Tomaradze, P. Zweber, J. Ernst, H. Severini, S. Dytman, W. Love, V. Savinov, O. Aquines, Z. Li, A. Lopez, S. Mehrabyan, H. Mendez, J. Ramirez, G. Huang, D. Miller, V. Pavlunin, B. Sanghi, I. Shipsey, B. Xin, G. Adams, M. Anderson, J. Cummings, I. Dankó, J. Napolitano, Q. He, J. Insler, H. Muramatsu, C. S. Park, E. Thorndike

/ Abstract

Using data collected with the CLEO detector operating at the CESR e+e- collider at sqrt[s]=3.97-4.26 GeV, we investigate 15 charmonium decay modes of the psi(4040), psi(4160), and Y(4260) resonances. We confirm, at 11 sigma significance, the BABAR Y(4260)-->pi+pi- J/psi discovery, make the first observation of Y(4260)--> pi(0)pi(0) J/psi (5.1 sigma), and find the first evidence for Y(4260)-->K+K- J/psi(3.7 sigma). We measure e+e- cross sections at sqrt[s]=4.26 GeV as sigma(pi+pi- J/psi)=58(+12)(-10)+/-4 pb, sigma(pi(0)pi(0) J/psi)=23(+12)(-8)+/-1 pb, and sigma(K+K- J/psi)=9(+9)(-5)+/-1 pb, in which the uncertainties are statistical and systematic, respectively. Upper limits are placed on other decay rates from all three resonances.

Journal: Physical review letters

DOI: 10.1103/PhysRevLett.96.162003