A measurement of the total cross section and a study of inclusive muon production for the process e+e-→ hadrons in the energy range between 39.79 GeV and 46.78 GeV

W. Bartel, L. Becker, D. Cords, R. Eichler, R. Felst, D. Haidt, H. Junge, G. Knies, H. Krehbiel, P. Laurikainen, K. Meier, R. Meinke, B. Naroska, J. Olsson, D. Schmidt, P. Steffen, G. Dietrich, J. Hagemann, G. Heinzelmann, H. KadoK. Kawagoe, C. Kleinwort, M. Kuhlen, A. Petersen, R. Ramcke, U. Schneekloth, G. Weber, K. Ambrus, S. Bethke, A. Dieckmann, E. Elsen, J. Heintze, K. H. Hellenbrand, S. Komamiya, J. Von Krogh, P. Lennert, H. Matsumura, H. Rieseberg, J. Spitzer, A. Wagner, C. K. Bowdery, A. J. Finch, F. Foster, G. Hughes, J. M. Nye, J. Allison, A. H. Ball, R. J. Barlow, J. Chrin, I. P. Duerdoth, T. Greenshaw, P. Hill, F. K. Loebinger, A. A. Macbeth, H. McCann, H. E. Mills, P. G. Murphy, K. Stephens, P. Warming, R. G. Glasser, J. A.J. Skard, S. R. Wagner, G. T. Zorn, S. L. Cartwright, D. Clarke, R. Marshall, R. P. Middleton, T. Kawamoto, T. Kobayashi, T. Mashimo, M. Minowa, H. Takeda, T. Takeshita, S. Yamada

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The total cross section and the inclusive muon cross section for the process e+e-→ hadrons have been measured in the center of mass energy range between 39.79 and 46.78 GeV. The ratio R shows no significant structure. It has an average value of 4.13±0.08±0.14. An upper limit is set on the production of narrow resonances. Limits are obtained for pair-produced heavy quarks. The data are compared with the standard electroweak interaction model including QCD corrections taking into account the five known types of quarks. Upper limits are given for a possible structure of quarks and for effects of color octet leptons.

Original languageEnglish
Pages (from-to)337-342
Number of pages6
JournalPhysics Letters B
Issue number4-5
Publication statusPublished - Oct 10 1985
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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