Y dipion transitions at energies near the Y(4S)

S. Glenn, Y. Kwon, A. L. Lyon, S. Roberts, E. H. Thorndike, C. P. Jessop, K. Lingel, H. Marsiske, M. L. Perl, V. Savinov, D. Ugolini, X. Zhou, T. E. Coan, V. Fadeyev, I. Korolkov, Y. Maravin, I. Narsky, R. Stroynowski, J. Ye, T. WlodekMarina Artuso, E. Dambasuren, S. Kopp, G. C. Moneti, R. Mountain, S. Schuh, Tomasz Skwarnicki, Sheldon Stone, A. Titov, G. Viehhauser, J. C. Wang, J. Bartelt, S. E. Csorna, K. W. McLean, S. Marka, Z. Xu, R. Godang, K. Kinoshita, I. C. Lai, P. Pomianowski, S. Schrenk, G. Bonvicini, D. Cinabro, R. Greene, L. P. Perera, G. J. Zhou, S. Chan, G. Eigen, E. Lipeles, J. S. Miller, M. Schmidtler, A. Shapiro, W. M. Sun, J. Urheim, A. J. Weinstein, F. Würthwein, D. E. Jaffe, G. Masek, H. P. Paar, E. M. Potter, S. Prell, V. Sharma, D. M. Asner, J. Gronberg, T. S. Hill, D. J. Lange, R. J. Morrison, H. N. Nelson, T. K. Nelson, D. Roberts, B. H. Behrens, W. T. Ford, A. Gritsan, H. Krieg, Krieg J. Roy, J. G. Smith, J. P. Alexander, R. Baker, C. Bebek, B. E. Berger, K. Berkelman, V. Boisvert, D. G. Cassel, D. S. Crowcroft, M. Dickson, S. Von Dombrowski, P. S. Drell, K. M. Ecklund, R. Ehrlich, A. D. Foland, P. Gaidarev, R. S. Galik, L. Gibbons, B. Gittelman, S. W. Gray, D. L. Hartill, B. K. Heltsley, P. I. Hopman, J. Kandaswamy

Research output: Contribution to journalArticle

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(Y(4S) →Y(2S)π+π-)<3.9×10-4 and B(Y(4S)→Y(1S)π+π-)<1.2×10 -4. We also observe the transitions Y(3S)→Y(1S)π+π-, Y(3S)→Y(2S)π+π-, and Y(2S)→Y(1S)π+π-, from which we measure the cross sections for the radiative processes e+e-→Y(3S)γ and e+e-→Y(2S)γ. We obtain σee→Y(3S)γ = (17.8±3.0±1.7) pb and σee→Y(2S)γ=(15.5±1.3±1.4) pb at Ec.m. = 10.58 GeV, and σee→Y(3S)γ=(27.3±5.0±2.6) pb and σee→Y(2S)γ=(16.3±1.8±1.5) pb at Ec.m. = 10.52 GeV, which we compare with theoretical predictions.

Original languageEnglish (US)
Article number052003
JournalPhysical Review D
Volume59
Issue number5
StatePublished - 1999

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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  • Cite this

    Glenn, S., Kwon, Y., Lyon, A. L., Roberts, S., Thorndike, E. H., Jessop, C. P., Lingel, K., Marsiske, H., Perl, M. L., Savinov, V., Ugolini, D., Zhou, X., Coan, T. E., Fadeyev, V., Korolkov, I., Maravin, Y., Narsky, I., Stroynowski, R., Ye, J., ... Kandaswamy, J. (1999). Y dipion transitions at energies near the Y(4S). Physical Review D, 59(5), [052003].