Υ dipion transitions at energies near the Υ(4S) Article

Glenn, S, Kwon, Y, Lyon, AL et al. (1999). Υ dipion transitions at energies near the Υ(4S) . PHYSICAL REVIEW D, 59(5), 1-8. 10.1103/PhysRevD.59.052003

cited authors

  • Glenn, S; Kwon, Y; Lyon, AL; Roberts, S; Thorndike, EH; Jessop, CP; Lingel, K; Marsiske, H; Perl, ML; Savinov, V; Ugolini, D; Zhou, X; Coan, TE; Fadeyev, V; Korolkov, I; Maravin, Y; Narsky, I; Stroynowski, R; Ye, J; Wlodek, T; Artuso, M; Dambasuren, E; Kopp, S; Moneti, GC; Mountain, R; Schuh, S; Skwarnicki, T; Stone, S; Titov, A; Viehhauser, G; Wang, JC; Bartelt, J; Csorna, SE; McLean, KW; Marka, S; Xu, Z; Godang, R; Kinoshita, K; Lai, IC; Pomianowski, P; Schrenk, S; Bonvicini, G; Cinabro, D; Greene, R; Perera, LP; Zhou, GJ; Chan, S; Eigen, G; Lipeles, E; Miller, JS; Schmidtler, M; Shapiro, A; Sun, WM; Urheim, J; Weinstein, AJ; Würthwein, F; Jaffe, DE; Masek, G; Paar, HP; Potter, EM; Prell, S; Sharma, V; Asner, DM; Gronberg, J; Hill, TS; Lange, DJ; Morrison, RJ; Nelson, HN; Nelson, TK; Roberts, D; Behrens, BH; Ford, WT; Gritsan, A; Krieg, H; Roy, J; Smith, JG; Alexander, JP; Baker, R; Bebek, C; Berger, BE; Berkelman, K; Boisvert, V; Cassel, DG; Crowcroft, DS; Dickson, M; Von Dombrowski, S; Drell, PS; Ecklund, KM; Ehrlich, R; Foland, AD; Gaidarev, P; Galik, RS; Gibbons, L; Gittelman, B; Gray, SW; Hartill, DL; Heltsley, BK; Hopman, PI; Kandaswamy, J; Kreinick, DL

authors

abstract

  • Using a 4.19 fb-1 data sample collected with the CLEO II detector at the Cornell Electron Storage Ring, we have searched for dipion transitions between pairs of Y resonances at center of mass energies Ec.m. = 10.58 GeV and Ec.m. = 10.52GeV. We obtain the 90% confidence level upper limits B(Υ(4S) →Υ (2S) π+π-)<3.9×10-4 and B(Υ(4S)→Υ(1S)π+π -)<1.2×10-4. We also observe the transitions Υ(2S)→Υ(1S)π+π-, Υ(3S)→Υ(2S)π+π-, and Υ(2S)→Υ(1S)π+π-, from which we measure the cross sections for the radiative processes e+e-→Υ(2S)γ and e+e-→Υ(2S)γ. We obtain σee→Υ(3S)γ = (17.8±3.0±1.7)pb and ee→Υ(2S)γ = (15.5±1.3±1.4) pb at Ec.m. = 10.58 GeV, and ee→Υ(3S)γ = (27.3 ±5.0±2.6) pb and ee→Υ(2S)γ = (16.3±1.8±1.5) pb at Ec.m. = 10.52 GeV, which we compare with theoretical predictions. ©1999 The American Physical Society.

publication date

  • March 1, 1999

published in

Digital Object Identifier (DOI)

start page

  • 1

end page

  • 8

volume

  • 59

issue

  • 5