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

• Published in: Physical review letters 2006-04, Vol.96 (16), p.162003-162003, Article 162003
• Main Authors: Coan, T E, Gao, Y S, Liu, F, Artuso, M, Blusk, S, Butt, J, Li, J, Menaa, N, Mountain, R, Nisar, S, Randrianarivony, K, Redjimi, R, Sia, R, Skwarnicki, T, Stone, S, Wang, J C, Zhang, K, Csorna, S E, Bonvicini, G, Cinabro, D, Dubrovin, M, Lincoln, A, Asner, D M, Edwards, K W, Briere, R A, Brock, I, Chen, J, Ferguson, T, Tatishvili, G, Vogel, H, Watkins, M E, Rosner, J L, Adam, N E, Alexander, J P, Berkelman, K, Cassel, D G, Duboscq, J E, Ecklund, K M, Ehrlich, R, Fields, L, Galik, R S, Gibbons, L, Gray, R, Gray, S W, Hartill, D L, Heltsley, B K, Hertz, D, Jones, C D, Kandaswamy, J, Kreinick, D L, Kuznetsov, V E, Mahlke-Krüger, H, Meyer, T O, Onyisi, P U E, Patterson, J R, Peterson, D, Phillips, E A, Pivarski, J, Riley, D, Ryd, A, Sadoff, A J, Schwarthoff, H, Shi, X, Stroiney, S, Sun, W M, Wilksen, T, Weinberger, M, Athar, S B, Avery, P, Breva-Newell, L, Patel, R, Potlia, V, Stoeck, H, Yelton, J, Rubin, P, Cawlfield, C, Eisenstein, B I, Karliner, I, Kim, D, Lowrey, N, Naik, P, Sedlack, C, Selen, M, White, E J, Wiss, J, Shepherd, M R, Besson, D, Pedlar, T K, Cronin-Hennessy, D, Gao, K Y, Gong, D T, Hietala, J, Kubota, Y, Klein, T, Lang, B W, Poling, R, Scott, A W, Smith, A, Dobbs, S, Metreveli, Z
• Format: Article
• Language: English
• ISSN: 0031-9007; 1079-7114
• DOI: 10.1103/PhysRevLett.96.162003

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.