Topology of three-jet events in p[over ¯]p collisions at sqrt[s]=1.8 TeV

F. Abe, D. Amidei, G. Apollinari,M. Atac,P. Auchincloss, A. R. Baden, N. Bacchetta,M. W. Bailey,A. Bamberger,P. de Barbaro, B. A. Barnett, A. Barbaro-Galtieri, V. E. Barnes,T. Baumann, F. Bedeschi,S. Behrends, S. Belforte, G. Bellettini, J. Bellinger,D. Benjamin,J. Bensinger, A. Beretvas,J. P. Berge,S. Bertolucci,S. Bhadra,M. Binkley,R. Blair, C. Blocker,V. Bolognesi,A. W. Booth,C. Boswell,G. Brandenburg,D. Brown,E. Buckley-Geer,H. S. Budd,G. Busetto,A. Byon-Wagner, K. L. Byrum,C. Campagnari, M. Campbell,A. Caner,R. Carey,W. Carithers, D. Carlsmith,J. T. Carroll,R. Cashmore, A. Castro,F. Cervelli,K. Chadwick, G. Chiarelli,W. Chinowsky, S. Cihangir,A. G. Clark,D. Connor, M. Contreras,J. Cooper,M. Cordelli,D. Crane, M. Curatolo,C. Day,F. DeJongh,S. Dell'Agnello,M. Dell'Orso, L. Demortier,B. Denby,P. F. Derwent,T. Devlin,D. DiBitonto,M. Dickson,R. B. Drucker, K. Einsweiler,J. E. Elias,R. Ely,S. Eno, S. Errede, B. Esposito,B. Flaugher,G. W. Foster,M. Franklin, J. Freeman, H. Frisch,T. Fuess,Y. Fukui,Y. Funayama,A. F. Garfinkel,A. Gauthier,S. Geer,D. W. Gerdes, P. Giannetti, N. Giokaris,P. Giromini, L. Gladney,M. Gold, K. Goulianos,H. Grassmann,C. Grosso-Pilcher,C. Haber, S. R. Hahn,R. Handler, K. Hara,R. M. Harris, J. Hauser,C. Hawk,T. Hessing, R. Hollebeek,P. Hu,B. Hubbard, B. T. Huffman, R. Hughes,P. Hurst, J. Huth,H. Hylen,M. Incagli,T. Ino,H. Iso,H. Jensen, C. P. Jessop,R. P. Johnson, U. Joshi,R. W. Kadel, T. Kamon,S. Kanda, D. A. Kardelis,I. Karliner,E. Kearns,L. Keeble,R. Kephart,P. Kesten,R. M. Keup,H. Keutelian,D. Kim, S. Kim, L. Kirsch,K. Kondo, J. Konigsberg,E. Kovacs,S. E. Kuhlmann,E. Kuns, A. T. Laasanen,J. I. Lamoureux,S. Leone, J. Lewis, W. Li, T. M. Liss, P. Limon,N. Lockyer,C. B. Luchini,P. Lukens,P. Maas,M. Mangano,J. P. Marriner,M. Mariotti, R. Markeloff,L. A. Markosky,R. Mattingly,P. McIntyre, A. Menzione,T. Meyer,S. Mikamo, M. Miller,T. Mimashi,S. Miscetti,M. Mishina,S. Miyashita,Y. Morita, S. Moulding,J. Mueller, A. Mukherjee,L. F. Nakae, I. Nakano, C. Nelson, C. Newman-Holmes, J. S. T. Ng,M. Ninomiya, L. Nodulman,S. Ogawa, R. Paoletti,A. Para,E. Pare,S. Park,J. Patrick, T. J. Phillips,R. Plunkett,L. Pondrom,J. Proudfoot,F. Ptohos, G. Punzi,D. Quarrie,K. Ragan, G. Redlinger,J. Rhoades,M. Roach,F. Rimondi, L. Ristori, T. Rodrigo,T. Rohaly, A. Roodman,W. K. Sakumoto, A. Sansoni,R. D. Sard, A. Savoy-Navarro,V. Scarpine,P. Schlabach,E. E. Schmidt,O. Schneider,M. H. Schub, R. Schwitters, A. Scribano,S. Segler, Y. Seiya,M. Sekiguchi, M. Shapiro,N. M. Shaw,M. Sheaff,M. Schochet, J. Siegrist, P. Sinervo,J. Skarha, K. Sliwa,D. A. Smith,F. D. Snider,L. Song, M. Spahn,P. Sphicas,R. St. Denis,A. Stefanini,G. Sullivan,R. L. Swartz,M. Takano,F. Tartarelli,K. Takikawa, S. Tarem,D. Theriot,M. Timko,P. Tipton, S. Tkaczyk,A. Tollestrup,J. Tonnison, W. Trischuk, N. Turini,Y. Tsay, F. Ukegawa,D. Underwood,S. Vejcik,R. Vidal,R. G. Wagner,R. L. Wagner,N. Wainer,J. Walsh,T. Watts,R. Webb,C. Wendt,H. Wenzel,W. C. Wester,T. Westhusing,S. N. White,A. B. Wicklund,H. H. Williams,B. L. Winer,J. Wyss, A. Yagil,A. Yamashita,K. Yasuoka,G. P. Yeh, J. Yoh,M. Yokoyama, J. C. Yun, A. Zanetti,F. Zetti,S. Zucchelli

PHYSICAL REVIEW D(1992)

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摘要
The production and event topology of three-jet events produced in ppBAR collisions at square-root s = 1.8 TeV have been studied with the Collider Detector at Fermilab at the Tevatron Collider. The distributions of the three-jet angular variables (psi* and cos-theta*) and of the variables describing the energy sharing between jets (x3 and x4) are found to agree well with tree-level QCD calculations. These distributions are predicted to have different shapes for different initial-state subprocesses (quark-antiquark, quark-gluon, and gluon-gluon). The data are consistent with the small expected contribution from quark-antiquark initial states, in agreement with theoretical expectations.
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