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Comparison of three-jet events in $p \bar{p}$ collisions at $\sqrt{s} = 1.8$ TeV to predictions from a next-to-leading order QCD calculation

D. Acosta¹⁴, T. Affolder⁷, M. G. Albrow¹³, D. Ambrose³⁶, D. Amidei²⁷, K. Anikeev²⁶, J. Antos¹, G. Apollinari¹³, T. Arisawa⁵⁰ et al.

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. Thomas^30,*, 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.

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Phys. Rev. D 71, 032002 – Published 4 February, 2005

DOI: https://doi.org/10.1103/PhysRevD.71.032002

Abstract

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 $86 {p b}^{- 1}$ , were recorded by the CDF Experiment for $p \bar{p}$ collisions at $\sqrt{s} = 1.8$ 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 $466 \pm 3 (s t a t .)_{- 70}^{+ 207} (s y s t .)$ 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.

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Comparison of three-jet events in $p \bar{p}$ collisions at $\sqrt{s} = 1.8$ TeV to predictions from a next-to-leading order QCD calculation

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Comparison of three-jet events in pp¯ collisions at s=1.8 TeV to predictions from a next-to-leading order QCD calculation

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Comparison of three-jet events in $p \bar{p}$ collisions at $\sqrt{s} = 1.8$ TeV to predictions from a next-to-leading order QCD calculation