Comparison Of The Particle Flow In Qqbarg And Qqbar-Gamma Events In E+E- Annihilation

H. Aihara,M. Alston-Garnjost,R. Avery, A. Barbaro-Galtieri,A. Barker,A. Barnes,B. Barnett,D. Bauer,H. Bengtsson,D. Bintinger,G. Bobbink,T. Bolognese, A. Bross,C. Buchanan,A. Buijs,M. Cain,D. Caldwell,A. Clark,G. Cowan,D. Crane,O. Dahl,K. Derby,J. Eastman,P. Eberhard,A. Eisner,R. Enomoto,F. Erné,T. Fujii,J. Gary, W. Gorn,J. Hauptman,W. Hofmann,J. Huth,J. Hylen,T. Kamae,H. Kaye,K. Kees,R. Kenney,L. Kerth,Winston Ko,R. Koda,R. Kofler,K. Kwong, R. Lander,W. Langeveld,J. Layter,F. Linde,C. Lindsey,S. Loken,A. Lu,X. Lu,G. Lynch,R. Madaras,K. Maeshima,B. Magnuson,J. Marx,K. Maruyama,G. Masek,L. Mathis,J. Matthews,S. Maxfield,S. Melnikoff,E. Miller,W. Moses,R. McNeil, P. Nemethy,D. Nygren,P. Oddone, H. Paar,D. Park, D. Pellet,M. Pripstein,M. Ronan,R. Ross,F. Rouse,K. Schwitkis,J. Sens,G. Shapiro,M. Shapiro,B. Shen,W. Slater,J. Smith,J. Steinman,M. Stevenson,D. Stork,M. Strauss,M. Sullivan, T. Takahashi,J. Thompson,N. Toge,R. van Tyen,B. van Uitert,G. VanDalen,R. van Daalen Wetters,W. Vernon, W. Wagner,E. Wang, Y. Wang, M. Wayne,W. Wenzel,J. White,M. Williams,Z. Wolf,H. Yamamoto,M. Yamauchi,S. Yellin,C. Zeitlin,W. Zhang

PHYSICAL REVIEW LETTERS（1986）

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摘要

We compare the particle flow in the event plane of three-jet qq-barg (quark-antiquark-gluon) events with the particle flow in radiative annihilation events qq-bar..gamma.. (quark-antiquark-photon) for similar kinematic configurations. In the angular region between quark and antiquark jet, we find a significant decrease in particle density for qq-barg as compared to qq-bar..gamma... This effect is predicted in QCD as a result of destructive interference between soft-gluon radiation from quark, antiquark, and hard gluon.

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