Discovery of Three-Jet Events and a Test of Quantum Chromodynamics at PETRA

Discovery of Three-Jet Events and a Test of Quantum Chromodynamics at PETRA D. P. Barber, U. Becker, H. Benda, A. Boehm, J. G. Branson, J. Bron, D. Buikman, J. Burger, C. C. Chang, H. S. Chen, M. Chen, C. P. Cheng, Y. S. Chu, R. Clare, P. Duinker, G. Y. Fang, H. Fesefeldt, D. Fong, M. Fukushima, J. C. Guo, A. Hariri, G. Herten, M. C. Ho, H. K. Hsu, T. T. Hsu, R. W. Kadel, W. Krenz, Z. Li, Q. Z. Li, M. Lu, D. Luckey, D. A. Ma, C. M. Ma. , G. G. G. Massaro, T. Matsuda, H. Newman, J. Paradiso, F. P. Poschmann, J. P. Revol, M. Rohde, H. Rykaczewski, K. Sinram, H. W. Tang, L. G. Tang, Samuel C. C. Ting, K. I. Tung, F. Vannucci, X. R. Wang, P. S. Wei, M. White, G. H. Wu, T. W. Wu, J. P. Xi, P. C. Yare;, X. H. Yu, N. L. Zhang, and R. Y. Zhu lII. Physikalisches Institut Technische IIochschule, Aachen, ~est Germany, and Deutsches E/ektxonen-Synchrotron (DESK), Hamburg, West Germany, and Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, Massachusetts, and National Instituut voor Kemfysica en Hoge Ene-rgiefysica (NIKHEF), Sectie H, Amsterdam, The Netherlands, and Institute of High Energy Physics, Chinese Academy of Science, Peking, People's Republic of China (Received 31 August 1979)