Determination of G{cyrillic}ee of the Υ(1 S) and Υ(2 S) resonances, and measurement of R at W=9.39 GeV

Z. Jakubowski, D. Antreasyan, H. W. Bartels, D. Besset, Ch Bieler, J. K. Bienlein, A. Bizzeti, E. D. Bloom, I. Brock, K. Brockmüller, R. Cabenda, A. Cartacci, M. Cavalli-Sforza, R. Clare, A. Compagnucci, G. Conforto, R. Cowan, D. Coyne, G. Drews, A. EnglerK. Fairfield, G. Folger, A. Fridman, J. Gaiser, D. Gelphman, G. Glaser, G. Godfrey, K. Graaf, F. H. Heimlich, F. H. Heinsius, R. Hofstadter, J. Irion, H. Janssen, K. Karch, S. Keh, T. Kiel, H. Kilian, I. Kirkbride, T. Kloiber, M. Kobel, W. Koch, A. C. König, K. Königsmann, R. W. Kraemer, S. Krüger, G. Landi, R. Lee, S. Leffler, R. Lekebusch, A. M. Litke, W. Lockmann, S. Lowe, B. Lurz, D. Marlow, H. Marsiske, W. Maschmann, P. McBride, H. Meyer, B. Muryn, F. Messing, W. J. Metzger, B. Monteleoni, R. Nernst, B. Niczyporuk, G. Nowak, C. Peck, C. Pegel, P. G. Pelfer, B. Pollock, C. Pols, F. C. Porter, D. Prindle, P. Ratoff, M. Reidenbach, B. Renger, C. Rippich, M. Scheer, P. Schmitt, J. Schotanus, J. Schütte, A. Schwarz, F. Selonke, D. Sievers, T. Skwarnicki, V. Stock, K. Strauch, U. Strohbusch, J. Tompkins, H. J. Trost, B. van Uitert, R. T. Van de Walle, H. Vogel, A. Voigt, U. Volland, K. Wachs, K. Wacker, W. Walk, H. Wegener, D. Williams, P. Zschorsch

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Abstract

Using the Crystal Ball detector operating at the DORIS II storage ring we have measured the leptonic partial widths G{cyrillic}ee of the Υ(1 S) and Υ(2 S) resonances. We find {Mathematical expression} and {Mathematical expression} The effect on G{cyrillic}ee of applying different prescriptions for radiative corrections is discussed. We also measure R, the ratio of non-resonant hadronic cross section to the Born cross section of μ pair production, at c.m. energy W=9.39 GeV to be R=3.48±0.04±0.16.

Original languageEnglish (US)
Pages (from-to)49-61
Number of pages13
JournalZeitschrift für Physik C Particles and Fields
Volume40
Issue number1
DOIs
StatePublished - Mar 1 1988
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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    Jakubowski, Z., Antreasyan, D., Bartels, H. W., Besset, D., Bieler, C., Bienlein, J. K., Bizzeti, A., Bloom, E. D., Brock, I., Brockmüller, K., Cabenda, R., Cartacci, A., Cavalli-Sforza, M., Clare, R., Compagnucci, A., Conforto, G., Cowan, R., Coyne, D., Drews, G., ... Zschorsch, P. (1988). Determination of G{cyrillic}ee of the Υ(1 S) and Υ(2 S) resonances, and measurement of R at W=9.39 GeV. Zeitschrift für Physik C Particles and Fields, 40(1), 49-61. https://doi.org/10.1007/BF01559717