Phys. Rev. D
71,
032002
(2005)
[12 pages]
Comparison of three-jet events in pp̅ collisions at √s=1.8 TeV to predictions from a next-to-leading order QCD calculation
D. Acosta et al.
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D. Acosta14, T. Affolder7, M. G. Albrow13, D. Ambrose36, D. Amidei27, K. Anikeev26, J. Antos1, G. Apollinari13, T. Arisawa50, A. Artikov11, W. Ashmanskas2, F. Azfar34, P. Azzi-Bacchetta35, N. Bacchetta35, H. Bachacou24, W. Badgett13, A. Barbaro-Galtieri24, V. E. Barnes39, B. A. Barnett21, S. Baroiant5, M. Barone15, G. Bauer26, F. Bedeschi37, S. Behari21, S. Belforte47, W. H. Bell17, G. Bellettini37, J. Bellinger51, D. Benjamin12, A. Beretvas13, A. Bhatti41, M. Binkley13, D. Bisello35, M. Bishai13, R. E. Blair2, C. Blocker4, K. Bloom27, B. Blumenfeld21, A. Bocci41, A. Bodek40, G. Bolla39, A. Bolshov26, D. Bortoletto39, J. Boudreau38, C. Bromberg28, E. Brubaker24, J. Budagov11, H. S. Budd40, K. Burkett13, G. Busetto35, K. L. Byrum2, S. Cabrera12, M. Campbell27, W. Carithers24, D. Carlsmith51, A. Castro3, D. Cauz47, A. Cerri24, L. Cerrito20, J. Chapman27, C. Chen36, Y. C. Chen1, M. Chertok5, G. Chiarelli37, G. Chlachidze13, F. Chlebana13, M. L. Chu1, J. Y. Chung32, W.-H. Chung51, Y. S. Chung40, C. I. Ciobanu20, A. G. Clark16, M. Coca40, A. Connolly24, M. Convery41, J. Conway43, M. Cordelli15, J. Cranshaw45, R. Culbertson13, D. Dagenhart4, S. D’Auria17, P. de Barbaro40, S. De Cecco42, S. Dell’Agnello15, M. Dell’Orso37, S. Demers40, L. Demortier41, M. Deninno3, D. De Pedis42, P. F. Derwent13, C. Dionisi42, J. R. Dittmann13, A. Dominguez24, S. Donati37, M. D’Onofrio16, T. Dorigo35, N. Eddy20, R. Erbacher13, D. Errede20, S. Errede20, R. Eusebi40, S. Farrington17, R. G. Feild52, J. P. Fernandez39, C. Ferretti27, R. D. Field14, I. Fiori37, B. Flaugher13, L. R. Flores-Castillo38, G. W. Foster13, M. Franklin18, J. Friedman26, I. Furic26, M. Gallinaro41, A. F. Garfinkel39, C. Gay52, D. W. Gerdes27, E. Gerstein9, S. Giagu42, P. Giannetti37, K. Giolo39, M. Giordani47, P. Giromini15, V. Glagolev11, D. Glenzinski13, M. Gold30, N. Goldschmidt27, J. Goldstein34, G. Gomez8, M. Goncharov44, I. Gorelov30, A. T. Goshaw12, Y. Gotra38, K. Goulianos41, A. Gresele3, C. Grosso-Pilcher10, M. Guenther39, J. Guimaraes da Costa18, C. Haber24, S. R. Hahn13, E. Halkiadakis40, R. Handler51, F. Happacher15, K. Hara48, R. M. Harris13, F. Hartmann22, K. Hatakeyama41, J. Hauser6, J. Heinrich36, M. Hennecke22, M. Herndon21, C. Hill7, A. Hocker40, K. D. Hoffman10, S. Hou1, B. T. Huffman34, R. Hughes32, J. Huston28, J. Incandela7, G. Introzzi37, M. Iori42, C. Issever7, A. Ivanov40, Y. Iwata19, B. Iyutin26, E. James13, M. Jones39, T. Kamon44, J. Kang27, M. Karagoz Unel31, S. Kartal13, H. Kasha52, Y. Kato33, R. D. Kennedy13, R. Kephart13, B. Kilminster40, D. H. Kim23, H. S. Kim20, M. J. Kim9, S. B. Kim23, S. H. Kim48, T. H. Kim26, Y. K. Kim10, M. Kirby12, L. Kirsch4, S. Klimenko14, P. Koehn32, K. Kondo50, J. Konigsberg14, A. Korn26, A. Korytov14, J. Kroll36, M. Kruse12, V. Krutelyov44, S. E. Kuhlmann2, N. Kuznetsova13, A. T. Laasanen39, S. Lami41, S. Lammel13, J. Lancaster12, M. Lancaster25, R. Lander5, K. Lannon32, A. Lath43, G. Latino30, T. LeCompte2, Y. Le21, J. Lee40, S. W. Lee44, N. Leonardo26, S. Leone37, J. D. Lewis13, K. Li52, C. S. Lin13, M. Lindgren6, T. M. Liss20, D. O. Litvintsev13, T. Liu13, N. S. Lockyer36, A. Loginov29, M. Loreti35, D. Lucchesi35, P. Lukens13, L. Lyons34, J. Lys24, R. Madrak18, K. Maeshima13, P. Maksimovic21, L. Malferrari3, G. Manca34, M. Mangano37, M. Mariotti35, A. Martin52, M. Martin21, V. Martin31, M. Martínez13, P. Mazzanti3, K. S. McFarland40, P. McIntyre44, M. Menguzzato35, A. Menzione37, P. Merkel13, C. Mesropian41, A. Meyer13, T. Miao13, J. S. Miller27, R. Miller28, S. Miscetti15, G. Mitselmakher14, N. Moggi3, R. Moore13, T. Moulik39, A. Mukherjee13, M. Mulhearn26, T. Muller22, A. Munar36, P. Murat13, J. Nachtman13, S. Nahn52, I. Nakano19, R. Napora21, C. Nelson13, T. Nelson13, C. Neu32, M. S. Neubauer26, C. Newman-Holmes13, F. Niell27, T. Nigmanov38, L. Nodulman2, S. H. Oh12, Y. D. Oh23, T. Ohsugi19, T. Okusawa33, W. Orejudos24, C. Pagliarone37, F. Palmonari37, R. Paoletti37, V. Papadimitriou45, J. Patrick13, G. Pauletta47, M. Paulini9, T. Pauly34, C. Paus26, D. Pellett5, A. Penzo47, T. J. Phillips12, G. Piacentino37, J. Piedra8, K. T. Pitts20, A. Pompoš39, L. Pondrom51, G. Pope38, O. Poukhov11, T. Pratt34, F. Prokoshin11, J. Proudfoot2, F. Ptohos15, G. Punzi37, J. Rademacker34, A. Rakitine26, F. Ratnikov43, H. Ray27, A. Reichold34, P. Renton34, M. Rescigno42, F. Rimondi3, L. Ristori37, W. J. Robertson12, T. Rodrigo8, S. Rolli49, L. Rosenson26, R. Roser13, R. Rossin35, C. Rott39, A. Roy39, A. Ruiz8, D. Ryan49, A. Safonov5, R. St. Denis17, W. K. Sakumoto40, D. Saltzberg6, C. Sanchez32, A. Sansoni15, L. Santi47, S. Sarkar42, P. Savard46, A. Savoy-Navarro13, P. Schlabach13, E. E. Schmidt13, M. P. Schmidt52, M. Schmitt31, L. Scodellaro35, A. Scribano37, A. Sedov39, S. Seidel30, Y. Seiya48, A. Semenov11, F. Semeria3, M. D. Shapiro24, P. F. Shepard38, T. Shibayama48, M. Shimojima48, M. Shochet10, A. Sidoti35, A. Sill45, P. Sinervo46, A. J. Slaughter52, K. Sliwa49, F. D. Snider13, R. Snihur25, M. Spezziga45, L. Spiegel13, F. Spinella37, M. Spiropulu7, A. Stefanini37, J. Strologas30, D. Stuart7, A. Sukhanov14, K. Sumorok26, T. Suzuki48, R. Takashima19, K. Takikawa48, M. Tanaka2, M. Tecchio27, P. K. Teng1, K. Terashi41, R. J. Tesarek13, S. Tether26, J. Thom13, T. L. Thomas30,*, A. S. Thompson17, E. Thomson32, P. Tipton40, S. Tkaczyk13, D. Toback44, K. Tollefson28, D. Tonelli37, M. Tönnesmann28, H. Toyoda33, W. Trischuk46, J. Tseng26, D. Tsybychev14, N. Turini37, F. Ukegawa48, T. Unverhau17, T. Vaiciulis40, A. Varganov27, E. Vataga37, S. Vejcik, III13, G. Velev13, G. Veramendi24, R. Vidal13, I. Vila8, R. Vilar8, I. Volobouev24, M. von der Mey6, R. G. Wagner2, R. L. Wagner13, W. Wagner22, Z. Wan43, C. Wang12, M. J. Wang1, S. M. Wang14, B. Ward17, S. Waschke17, D. Waters25, T. Watts43, M. Weber24, W. C. Wester, III13, B. Whitehouse49, A. B. Wicklund2, E. Wicklund13, H. H. Williams36, P. Wilson13, B. L. Winer32, S. Wolbers13, M. Wolter49, S. Worm43, X. Wu16, F. Würthwein26, U. K. Yang10, W. Yao24, G. P. Yeh13, K. Yi21, J. Yoh13, T. Yoshida33, I. Yu23, S. Yu36, J. C. Yun13, L. Zanello42, A. Zanetti47, F. Zetti24, and S. Zucchelli3
1Institute of Physics, Academia Sinica, Taipei, Taiwan 11529, Republic of China
2Argonne National Laboratory, Argonne, Illinois 60439, U.S.A.
3Istituto Nazionale di Fisica Nucleare, University of Bologna, I-40127 Bologna, Italy
4Brandeis University, Waltham, Massachusetts 02254, U.S.A.
5University of California at Davis, Davis, California 95616, U.S.A.
6University of California at Los Angeles, Los Angeles, California 90024, U.S.A.
7University of California at Santa Barbara, Santa Barbara, California 93106, U.S.A.
8Instituto de Fisica de Cantabria, CSIC-University of Cantabria, 39005 Santander, Spain
9Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, U.S.A.
10Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, U.S.A.
11Joint Institute for Nuclear Research, RU-141980 Dubna, Russia
12Duke University, Durham, North Carolina 27708, U.S.A.
13Fermi National Accelerator Laboratory, Batavia, Illinois 60510, U.S.A.
14University of Florida, Gainesville, Florida 32611, U.S.A.
15Laboratori Nazionali di Frascati, Istituto Nazionale di Fisica Nucleare, I-00044 Frascati, Italy
16University of Geneva, CH-1211 Geneva 4, Switzerland
17Glasgow University, Glasgow G12 8QQ, United Kingdom
18Harvard University, Cambridge, Massachusetts 02138, U.S.A.
19Hiroshima University, Higashi-Hiroshima 724, Japan
20University of Illinois, Urbana, Illinois 61801, U.S.A.
21The Johns Hopkins University, Baltimore, Maryland 21218, U.S.A.
22Institut für Experimentelle Kernphysik, Universität Karlsruhe, 76128 Karlsruhe, Germany
23Center for High Energy Physics: Kyungpook National University, Taegu 702-701; Seoul National University, Seoul 151-742; and SungKyunKwan University, Suwon 440-746; Korea
24Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94720, U.S.A.
25University College London, London WC1E 6BT, United Kingdom
26Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, U.S.A.
27University of Michigan, Ann Arbor, Michigan 48109, U.S.A.
28Michigan State University, East Lansing, Michigan 48824, U.S.A.
29Institution for Theoretical and Experimental Physics, ITEP, Moscow 117259, Russia
30University of New Mexico, Albuquerque, New Mexico 87131, U.S.A.
31Northwestern University, Evanston, Illinois 60208, U.S.A.
32The Ohio State University, Columbus, Ohio 43210, U.S.A.
33Osaka City University, Osaka 588, Japan
34University of Oxford, Oxford OX1 3RH, United Kingdom
35Universita di Padova, Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 Padova, Italy
36University of Pennsylvania, Philadelphia, Pennsylvania 19104, U.S.A.
37Istituto Nazionale di Fisica Nucleare, University and Scuola Normale Superiore of Pisa, I-56100 Pisa, Italy
38University of Pittsburgh, Pittsburgh, Pennsylvania 15260, U.S.A.
39Purdue University, West Lafayette, Indiana 47907
40University of Rochester, Rochester, New York 14627, U.S.A.
41Rockefeller University, New York, New York 10021, U.S.A.
42Instituto Nazionale de Fisica Nucleare, Sezione di Roma, University di Roma I, “La Sapienza,” I-00185 Roma, Italy
43Rutgers University, Piscataway, New Jersey 08855, U.S.A.
44Texas A&M University, College Station, Texas 77843, U.S.A.
45Texas Tech University, Lubbock, Texas 79409, U.S.A.
46Institute of Particle Physics, University of Toronto, Toronto M5S 1A7, Canada
47Istituto Nazionale di Fisica Nucleare, University of Trieste/Udine, Italy
48University of Tsukuba, Tsukuba, Ibaraki 305, Japan
49Tufts University, Medford, Massachusetts 02155, U.S.A.
50Waseda University, Tokyo 169, Japan
51University of Wisconsin, Madison, Wisconsin 53706, U.S.A.
52Yale University, New Haven, Connecticut 06520, U.S.A.
Received 15 September 2004; published 4 February 2005
The properties of three-jet events with total transverse energy greater than 320 GeV and individual jet energy greater than 20 GeV have been analyzed and compared to absolute predictions from a next-to-leading order (NLO) perturbative QCD calculation. These data, of integrated luminosity 86 pb-1, were recorded by the CDF Experiment for pp̅ collisions at √s=1.8 TeV. This study tests a model of higher order QCD processes that result in gluon emission and may give some indication of the magnitude of the contribution of processes higher than NLO. The total cross section is measured to be 466±3(stat.)-70+207(syst.) pb. The differential cross section is furthermore measured for all kinematically accessible regions of the Dalitz plane, including those for which the theoretical prediction is unreliable. While the measured cross section is consistent with the theoretical prediction in magnitude, the two differ somewhat in shape in the Dalitz plane.
© 2005 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.71.032002
DOI:
10.1103/PhysRevD.71.032002
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