Observation of psi(3770) --> pi pi J/psi and measurement of Gamma ee[psi(2S)]. Academic Article uri icon

abstract

  • We observe signals for the decays psi(3770) --> XJ/psi from data acquired with the CLEO detector operating at the CESR e+ e- collider with square root of s = 3773 MeV. We measure the following branching fractions Beta(psi(3770) --> XJ/psi and significances: (189 +/- 20 +/- 20) x 10(-5) (11.6sigma) for X = pi+ pi-, (80 +/- 25 +/- 16) x 10(-5) (3.4sigma) for X = pi0 pi0, and (87 +/- 33 +/- 22) x 10(-5) (3.5sigma) for X = eta, where the errors are statistical and systematic, respectively. The radiative return process e+ e- --> gamma psi(2S) populates the same event sample and is used to measure Gamma ee[psi(2S)] = (2.54 +/- 0.03 +/- 0.11) keV.

published proceedings

  • Phys Rev Lett

author list (cited authors)

  • Adam, N. E., Alexander, J. P., Berkelman, K., Cassel, D. G., Crede, V., Duboscq, J. E., ... CLEO Collaboration.

complete list of authors

  • Adam, NE||Alexander, JP||Berkelman, K||Cassel, DG||Crede, V||Duboscq, JE||Ecklund, KM||Ehrlich, R||Fields, L||Galik, RS||Gibbons, L||Gittelman, B||Gray, R||Gray, SW||Hartill, DL||Heltsley, BK||Hertz, D||Jones, CD||Kandaswamy, J||Kreinick, DL||Kuznetsov, VE||Mahlke-Kr├╝ger, H||Meyer, TO||Onyisi, PUE||Patterson, JR||Peterson, D||Phillips, EA||Pivarski, J||Riley, D||Ryd, A||Sadoff, AJ||Schwarthoff, H||Shi, X||Shepherd, MR||Stroiney, S||Sun, WM||Urner, D||Wilksen, T||Weaver, KM||Weinberger, M||Athar, SB||Avery, P||Breva-Newell, L||Patel, R||Potlia, V||Stoeck, H||Yelton, J||Rubin, P||Cawlfield, C||Eisenstein, BI||Gollin, GD||Karliner, I||Kim, D||Lowrey, N||Naik, P||Sedlack, C||Selen, M||White, EJ||Williams, J||Wiss, J||Asner, DM||Edwards, KW||Besson, D||Pedlar, TK||Cronin-Hennessy, D||Gao, KY||Gong, DT||Hietala, J||Kubota, Y||Klein, T||Lang, BW||Li, SZ||Poling, R||Scott, AW||Smith, A||Dobbs, S||Metreveli, Z||Seth, KK||Tomaradze, A||Zweber, P||Ernst, J||Severini, H||Dytman, SA||Love, W||Mehrabyan, S||Mueller, JA||S

publication date

  • January 1, 2018 11:11 AM