Measurement of the muon pair asymmetry in e+e- annihilation at {Mathematical expression}

Ch Berger*, H. Genzel, W. Lackas, J. Pielorz, F. Raupach, W. Wagner, L. H. Flølo, A. Klovning, E. Lillestöl, J. M. Olsen, J. Bürger, L. Criegee, Ch Dehne, A. Deuter, A. Eskreys, G. Franke, M. Gaspero, Ch Gerke, U. Jacobs, G. KniesB. Lewendel, U. Maurus, J. Meyer, U. Michelsen, K. H. Pape, B. Stella, U. Timm, P. Waloschek, G. G. Winter, S. T. Xue, M. Zachara, W. Zimmermann, P. J. Bussey, S. L. Cartwright, J. B. Dainton, B. T. King, C. Raine, J. M. Scarr, I. O. Skillicorn, K. M. Smith, J. C. Thomson, O. Achterberg, V. Blobel, D. Burkart, K. Diehlmann, H. Kapitza, B. Koppitz, M. Krüger, W. Lührsen, M. Poppe, H. Spitzer, R. van Staa, C. Y. Chang, R. G. Glasser, R. G. Kellogg, S. J. Maxfield, R. O. Polvado, B. Sechi-Zorn, J. A. Skard, A. Skuja, A. J. Tylka, G. E. Welch, G. T. Zorn, F. Almeida, A. Bäcker, F. Barreiro, S. Brandt, K. Derikum, C. Grupen, H. J. Meyer, H. Müller, B. Neumann, M. Rost, K. Stupperich, G. Zech, G. Alexander, G. Bella, Y. Gnat, J. Grunhaus, H. J. Daum, H. Junge, K. Kraski, C. Maxeiner, H. Maxeiner, H. Meyer, D. Schmidt

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


The reaction e+e-→μ+μ- has been studied with the PLUTO detector at the c.m. energy of 34.7 GeV, based on an integrated luminosity of 46 pb-1. The total cross section agrees with QED predictions, and the corresponding lower limits for the Λ+ and Λ- QED cutoff parameters are 267 and 126 GeV respectively (95% c.l.). A forward-backward asymmetry parameter A=-(13.4±3.1±<1)% is observed, which is in agreement with the standard model, as well as with other PETRA results obtained at the same energy.

Original languageEnglish
Pages (from-to)53-57
Number of pages5
JournalEuropean Physical Journal C
Issue number1
StatePublished - Mar 1983


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