Experimental studies on multijet production in e+e- annihilation at PETRA energies

W. Bartel, L. Becker, R. Felst, D. Haidt, G. Knies, H. Krehbiel, P. Laurikainen, N. Magnussen, R. Meinke, B. Naroska, J. Olsson, D. Schmidt, G. Dietrich, T. Greenshaw, J. Hagemann, G. Heinzelmann, H. Kado, C. Kleinwort, M. Kuhlen, A. PetersenR. Ramcke, U. Schneekloth, G. Weber, K. Ambrus, S. Bethke, A. Dieckmann, E. Elsen, J. Heintze, K. H. Hellenbrand, S. Komamiya, J. von Krogh, H. Rieseberg, H. v. d. Schmitt, L. Smolik, J. Spitzer, A. Wagner, M. Zimmer, C. K. Bowdery, A. J. Finch, F. Foster, G. Hughes, J. M. Nye, J. Allison, R. J. Barlow, J. Chrin, I. P. Duerdoth, F. K. Loebinger, A. A. Macbeth, H. E. Mills, P. G. Murphy, K. Stephens, P. Warming, R. G. Glasser, P. Hill, J. A.J. Skard, S. R. Wagner, G. T. Zorn, S. L. Cartwright, D. Clarke, R. Marshall, R. P. Middleton, K. Kawagoe, T. Mashimo, T. Takeshita, S. Yamada

研究成果: Article

432 引用 (Scopus)

抜粋

Hadronic jet production by e+e--annihilation has been studied in the energy range of 14.0-46.7 GeV. The data have been analysed in terms of a cluster algorithm and other topological quantities. The results are compared with 2nd order QCD calculations which incorporate models for the fragmentation of quarks and gluons into hadrons. At the higher energies we observe more spherical and 4-jet like events than predicted by these calculations. We cannot achieve a simultaneous description of the observed 3- and 4-jet production by adjusting the strong coupling constant αs or the fragmentation parameters of the 2nd order QCD models. The observed excess of spherical events can partially be explained by the production of multi-parton events expected from higher order QCD contributions. Consequences of the presented results for the value of αs, determined in previous analyses, are discussed. QCD parton shower models, including soft gluon interference, are able to describe the observed number of spherical events.

元の言語English
ページ(範囲)23-31
ページ数9
ジャーナルZeitschrift für Physik C Particles and Fields
33
発行部数1
DOI
出版物ステータスPublished - 1986 3
外部発表Yes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Bartel, W., Becker, L., Felst, R., Haidt, D., Knies, G., Krehbiel, H., Laurikainen, P., Magnussen, N., Meinke, R., Naroska, B., Olsson, J., Schmidt, D., Dietrich, G., Greenshaw, T., Hagemann, J., Heinzelmann, G., Kado, H., Kleinwort, C., Kuhlen, M., ... Yamada, S. (1986). Experimental studies on multijet production in e+e- annihilation at PETRA energies. Zeitschrift für Physik C Particles and Fields, 33(1), 23-31. https://doi.org/10.1007/BF01410449