An improved measurement of electroweak couplings from e+e-→e+e- and e+e-→μ+μ-

M. Althoff, W. Braunschweig, F. J. Kirschfink, K. Lübelsmeyer, H. U. Martyn, G. Peise, J. Rimkus, P. Rosskamp, H. G. Sander, D. Schmitz, H. Siebke, W. Wallraff, H. M. Fischer, H. Hartmann, W. Hillen, A. Jocksch, G. Knop, L. Köpke, H. Kolanoski, H. KückR. Wedemeyer, N. Wermes, M. Wollstadt, H. Burkhardt, Y. Eisenberg, K. Gather, H. Hultschig, P. Joos, W. Koch, U. Kötz, H. Kowalski, A. Ladage, B. Lohr, D. Lüke, P. Mättig, D. Notz, J. Pyrlik, D. R. Quarrie, M. Rushton, W. Schütte, D. Trines, G. Wolf, Ch Xiao, R. Fohrmann, E. Hilger, T. Kracht, H. L. Krasemann, P. Leu, E. Lohrmann, D. Pandoulas, G. Poelz, B. H. Wiik, R. Beuselinck, D. M. Binnie, A. J. Campbell, P. J. Dornan, B. Foster, D. A. Garbutt, C. Jenkins, T. D. Jones, W. G. Jones, J. McCardle, J. K. Sedgbeer, W. A.T. Wan Abdullah, K. W. Bell, M. G. Bowler, I. C. Brock, R. J. Cashmore, P. E.L. Clarke, R. Devenish, P. Grossmann, S. L. Llyod, G. L. Salmon, J. Thomas, T. R. Wyatt, C. Youngman, J. C. Hart, J. Harvey, D. K. Hasell, J. Proudfoot, D. H. Saxon, P. L. Woodworth, F. Barreiro, M. Dittmar, M. Holder, B. Neumann, E. Duchovni, U. Karshon, G. Mikenberg, R. Mir, D. Revel, E. Ronat, A. Shapira, G. Yekutieli, T. Barklow, A. Caldwell, M. Cherney, J. M. Izen, M. Mermikides, G. Rudolph, D. Strom, H. Venkataramania, E. Wicklund, Sau Lan Wu, G. Zobernig

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We present an analysis of electroweak leptonic couplings from high statistics experiments on Bhabha scattering and μ pair production at an energy of 34.5 GeV. The forward-backward charge asymmetry of the μ pairs was measured to be -0.098±0.023±0.005. The data were found to agree well with the standard theory of electroweak interaction giving sin2θW=0.27±0.07. The leptonic weak couplings were determined to be gv=0.000±0.170 and gA=-0.481±0.055. The data were also used to investigate a class of composite models for leptons.

Original languageEnglish (US)
Pages (from-to)13-21
Number of pages9
JournalZeitschrift für Physik C Particles and Fields
Issue number1
StatePublished - Mar 1984
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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