Differential three-jet cross section in e+e--annihilation and comparison with second-order predictions of QCD and abelian vector theory

W. Bartel, D. Cords, G. Dietrich, P. Dittmann, R. Eichler, R. Felst, D. Haidt, H. Krehbiel, K. Meier, B. Naroska, L. H. O'Neill, P. Steffen, E. Elsen, A. Petersen, P. Warming, G. Weber, G. Kramer, G. Schierholz, S. Bethke, J. HeintzeG. Heinzelmann, K. H. Hellenbrand, R. D. Heuer, J. von Krogh, P. Lennert, S. Kawabata, S. Komamiya, H. Matsumura, T. Nozaki, J. Olsson, H. Rieseberg, A. Wagner, A. Bell, F. Foster, G. Hughes, H. Wriedt, J. Allison, A. H. Ball, G. Bamford, R. Barlow, C. Bowdery, I. P. Duerdoth, I. Glendinning, F. K. Loebinger, A. A. Macbeth, H. McCann, H. E. Mills, P. G. Murphy, P. Rowe, K. Stephens, D. Clarke, M. C. Goddard, R. Marshall, G. F. Pearce, J. Kanzaki, T. Kobayashi, M. Koshiba, M. Minowa, M. Nozaki, S. Odaka, S. Orito, A. Sato, H. Takeda, Y. Totsuka, Y. Watanabe, S. Yamada, C. Yanagisawa

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Abstract

Differential three-jet cross sections have been measured in e+e--annihilation at an average CM energy of 33.8 GeV and were compared to first- and second-order predictions of QCD and of a QED-like abelian vector theory. QCD provides a good description of the observed distributions. The inclusion of second-order effects reduced the observed quark-gluon coupling strength by about 20% to αS = 0.16 ± 0.015 (stat.) ± 0.03 (syst.). The abelian vector theory is found to be incompatible with the data.

Original languageEnglish
Pages (from-to)239-244
Number of pages6
JournalPhysics Letters B
Volume119
Issue number1-3
DOIs
Publication statusPublished - 1982 Dec 16

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Bartel, W., Cords, D., Dietrich, G., Dittmann, P., Eichler, R., Felst, R., Haidt, D., Krehbiel, H., Meier, K., Naroska, B., O'Neill, L. H., Steffen, P., Elsen, E., Petersen, A., Warming, P., Weber, G., Kramer, G., Schierholz, G., Bethke, S., ... Yanagisawa, C. (1982). Differential three-jet cross section in e+e--annihilation and comparison with second-order predictions of QCD and abelian vector theory. Physics Letters B, 119(1-3), 239-244. https://doi.org/10.1016/0370-2693(82)90285-4