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Charged jet evolution and the underlying event in proton-antiproton collisions at 1.8 TeV

T. Affolder1, H. Akimoto2, A. Akopian3, M. G. Albrow4, P. Amaral5, D. Amidei6, K. Anikeev7, J. Antos8, G. Apollinari4 et al. (CDF Collaboration)

G. Apollinari4, T. Arisawa2, A. Artikov9, T. Asakawa10, W. Ashmanskas5, F. Azfar11, P. Azzi-Bacchetta12, N. Bacchetta12, H. Bachacou1, S. Bailey13, P. de Barbaro14, A. Barbaro-Galtieri1, V. E. Barnes15, B. A. Barnett16, S. Baroiant17, M. Barone18, G. Bauer7, F. Bedeschi19, S. Belforte20, W. H. Bell21, G. Bellettini19, J. Bellinger22, D. Benjamin23, J. Bensinger24, A. Beretvas4, J. P. Berge4, J. Berryhill5, A. Bhatti3, M. Binkley4, D. Bisello12, M. Bishai4, R. E. Blair25, C. Blocker24, K. Bloom6, B. Blumenfeld16, S. R. Blusk14, A. Bocci3, A. Bodek14, W. Bokhari26, G. Bolla15, Y. Bonushkin27, D. Bortoletto15, J. Boudreau28, A. Brandl29, S. van den Brink16, C. Bromberg30, M. Brozovic23, E. Brubaker1, N. Bruner29, E. Buckley-Geer4, J. Budagov9, H. S. Budd14, K. Burkett13, G. Busetto12, A. Byon-Wagner4, K. L. Byrum25, S. Cabrera23, P. Calafiura1, M. Campbell6, W. Carithers1, J. Carlson6, D. Carlsmith22, W. Caskey17, A. Castro31, D. Cauz20, A. Cerri19, A. W. Chan8, P. S. Chang8, P. T. Chang8, J. Chapman6, C. Chen26, Y. C. Chen8, M. -T. Cheng8, M. Chertok17, G. Chiarelli19, I. Chirikov-Zorin9, G. Chlachidze9, F. Chlebana4, L. Christofek32, M. L. Chu8, Y. S. Chung14, C. I. Ciobanu33, A. G. Clark34, A. Connolly1, J. Conway35, M. Cordelli18, J. Cranshaw36, R. Cropp37, R. Culbertson4, D. Dagenhart38, S. D’Auria21, F. DeJongh4, S. Dell’Agnello18, M. Dell’Orso19, L. Demortier3, M. Deninno31, P. F. Derwent4, T. Devlin35, J. R. Dittmann4, A. Dominguez1, S. Donati19, J. Done39, M. D’Onofrio19, T. Dorigo13, N. Eddy32, K. Einsweiler1, J. E. Elias4, E. Engels, Jr.28, R. Erbacher4, D. Errede32, S. Errede32, Q. Fan14, R. G. Feild40, J. P. Fernandez4, C. Ferretti19, R. D. Field41, I. Fiori31, B. Flaugher4, G. W. Foster4, M. Franklin13, J. Freeman4, J. Friedman7, Y. Fukui42, I. Furic7, S. Galeotti19, A. Gallas13,*, M. Gallinaro3, T. Gao26, M. Garcia-Sciveres1, A. F. Garfinkel15, P. Gatti12, C. Gay40, D. W. Gerdes6, P. Giannetti19, V. Glagolev9, D. Glenzinski4, M. Gold29, J. Goldstein4, I. Gorelov29, A. T. Goshaw23, Y. Gotra28, K. Goulianos3, C. Green15, G. Grim17, P. Gris4, L. Groer35, C. Grosso-Pilcher5, M. Guenther15, G. Guillian6, J. Guimaraes da Costa13, R. M. Haas41, C. Haber1, S. R. Hahn4, C. Hall13, T. Handa44, R. Handler22, W. Hao36, F. Happacher18, K. Hara10, A. D. Hardman15, R. M. Harris4, F. Hartmann44, K. Hatakeyama3, J. Hauser27, J. Heinrich26, A. Heiss44, M. Herndon16, C. Hill17, K. D. Hoffman15, C. Holck26, R. Hollebeek26, L. Holloway32, R. Hughes33, J. Huston30, J. Huth13, H. Ikeda10, J. Incandela4, G. Introzzi19, J. Iwai2, Y. Iwata43, E. James6, M. Jones26, U. Joshi4, H. Kambara34, T. Kamon39, T. Kaneko10, K. Karr38, H. Kasha40, Y. Kato45, T. A. Keaffaber15, K. Kelley7, M. Kelly6, R. D. Kennedy4, R. Kephart4, D. Khazins23, T. Kikuchi10, B. Kilminster14, B. J. Kim46, D. H. Kim46, H. S. Kim32, M. J. Kim46, S. B. Kim46, S. H. Kim10, Y. K. Kim1, M. Kirby23, M. Kirk24, L. Kirsch24, S. Klimenko41, P. Koehn33, K. Kondo2, J. Konigsberg41, A. Korn7, A. Korytov41, E. Kovacs25, J. Kroll26, M. Kruse23, S. E. Kuhlmann25, K. Kurino43, T. Kuwabara10, A. T. Laasanen15, N. Lai5, S. Lami3, S. Lammel4, J. Lancaster23, M. Lancaster1, R. Lander17, A. Lath35, G. Latino19, T. LeCompte25, A. M. Lee, IV23, K. Lee36, S. Leone19, J. D. Lewis4, M. Lindgren27, T. M. Liss32, J. B. Liu14, Y. C. Liu8, D. O. Litvintsev4, O. Lobban36, N. Lockyer26, J. Loken11, M. Loreti12, D. Lucchesi12, P. Lukens4, S. Lusin22, L. Lyons11, J. Lys1, R. Madrak13, K. Maeshima4, P. Maksimovic13, L. Malferrari31, M. Mangano19, M. Mariotti12, G. Martignon12, A. Martin40, J. A. J. Matthews29, J. Mayer37, P. Mazzanti31, K. S. McFarland14, P. McIntyre39, E. McKigney26, M. Menguzzato12, A. Menzione19, C. Mesropian3, A. Meyer4, T. Miao4, R. Miller30, J. S. Miller6, H. Minato10, S. Miscetti18, M. Mishina42, G. Mitselmakher41, N. Moggi31, E. Moore29, R. Moore6, Y. Morita42, T. Moulik15, M. Mulhearn7, A. Mukherjee4, T. Muller44, A. Munar19, P. Murat4, S. Murgia30, J. Nachtman27, V. Nagaslaev36, S. Nahn40, H. Nakada10, I. Nakano43, C. Nelson4, T. Nelson4, C. Neu33, D. Neuberger44, C. Newman-Holmes4, C.-Y. P. Ngan7, H. Niu24, L. Nodulman25, A. Nomerotski41, S. H. Oh23, Y. D. Oh46, T. Ohmoto43, T. Ohsugi43, R. Oishi10, T. Okusawa45, J. Olsen22, W. Orejudos1, C. Pagliarone19, F. Palmonari19, R. Paoletti19, V. Papadimitriou36, D. Partos24, J. Patrick4, G. Pauletta20, M. Paulini1,†, C. Paus7, D. Pellett17, L. Pescara12, T. J. Phillips23, G. Piacentino19, K. T. Pitts32, A. Pompos15, L. Pondrom22, G. Pope28, M. Popovic37, F. Prokoshin9, J. Proudfoot25, F. Ptohos18, O. Pukhov9, G. Punzi19, A. Rakitine7, F. Ratnikov35, D. Reher1, A. Reichold11, A. Ribon12, W. Riegler13, F. Rimondi31, L. Ristori19, M. Riveline37, W. J. Robertson23, A. Robinson37, T. Rodrigo47, S. Rolli38, L. Rosenson7, R. Roser4, R. Rossin12, C. Rott15, A. Roy15, A. Ruiz47, A. Safonov17, R. St. Denis21, W. K. Sakumoto14, D. Saltzberg27, C. Sanchez33, A. Sansoni18, L. Santi20, H. Sato10, P. Savard37, P. Schlabach4, E. E. Schmidt4, M. P. Schmidt40, M. Schmitt13,*, L. Scodellaro12, A. Scott27, A. Scribano19, S. Segler4, S. Seidel29, Y. Seiya10, A. Semenov9, F. Semeria31, T. Shah7, M. D. Shapiro1, P. F. Shepard28, T. Shibayama10, M. Shimojima10, M. Shochet5, A. Sidoti12, J. Siegrist1, A. Sill36, P. Sinervo37, P. Singh32, A. J. Slaughter40, K. Sliwa38, C. Smith16, F. D. Snider4, A. Solodsky3, J. Spalding4, T. Speer34, P. Sphicas7, F. Spinella19, M. Spiropulu13, L. Spiegel4, J. Steele22, A. Stefanini19, J. Strologas32, F. Strumia34, D. Stuart4, K. Sumorok7, T. Suzuki10, T. Takano45, R. Takashima43, K. Takikawa10, P. Tamburello23, M. Tanaka10, B. Tannenbaum27, M. Tecchio6, R. Tesarek4, P. K. Teng8, K. Terashi3, S. Tether7, A. S. Thompson21, R. Thurman-Keup25, P. Tipton14, S. Tkaczyk4, D. Toback39, K. Tollefson14, A. Tollestrup4, D. Tonelli19, H. Toyoda45, W. Trischuk37, J. F. de Troconiz13, J. Tseng7, N. Turini19, F. Ukegawa10, T. Vaiciulis14, J. Valls35, S. Vejcik, III4, G. Velev4, G. Veramendi1, R. Vidal4, I. Vila47, R. Vilar47, I. Volobouev1, M. von der Mey27, D. Vucinic7, R. G. Wagner25, R. L. Wagner4, N. B. Wallace35, Z. Wan35, C. Wang23, M. J. Wang8, B. Ward21, S. Waschke21, T. Watanabe10, D. Waters11, T. Watts35, R. Webb39, H. Wenzel44, W. C. Wester, III4, A. B. Wicklund25, E. Wicklund4, T. Wilkes17, H. H. Williams26, P. Wilson4, B. L. Winer33, D. Winn6, S. Wolbers4, D. Wolinski6, J. Wolinski30, S. Wolinski6, S. Worm29, X. Wu34, J. Wyss19, W. Yao1, G. P. Yeh4, P. Yeh8, J. Yoh4, C. Yosef30, T. Yoshida45, I. Yu46, S. Yu26, Z. Yu40, A. Zanetti20, F. Zetti1, and S. Zucchelli31 (CDF Collaboration)

  • 1Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94720
  • 2Waseda University, Tokyo 169, Japan
  • 3Rockefeller University, New York, New York 10021
  • 4Fermi National Accelerator Laboratory, Batavia, Illinois 60510
  • 5Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637
  • 6University of Michigan, Ann Arbor, Michigan 48109
  • 7Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
  • 8Institute of Physics, Academia Sinica, Taipei, Taiwan 11529, Republic of China
  • 9Joint Institute for Nuclear Research, RU-141980 Dubna, Russia
  • 10University of Tsukuba, Tsukuba, Ibaraki 305, Japan
  • 11University of Oxford, Oxford OX1 3RH, United Kingdom
  • 12Universita di Padova, Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 Padova, Italy
  • 13Harvard University, Cambridge, Massachusetts 02138
  • 14University of Rochester, Rochester, New York 14627
  • 15Purdue University, West Lafayette, Indiana 47907
  • 16The Johns Hopkins University, Baltimore, Maryland 21218
  • 17University of California at Davis, Davis, California 95616
  • 18Laboratori Nazionali di Frascati, Istituto Nazionale di Fisica Nucleare, I-00044 Frascati, Italy
  • 19Istituto Nazionale di Fisica Nucleare, University and Scuola Normale Superiore of Pisa, I-56100 Pisa, Italy
  • 20Istituto Nazionale di Fisica Nucleare, University of Trieste/Udine, Italy
  • 21Glasgow University, Glasgow G12 8QQ, United Kingdom
  • 22University of Wisconsin, Madison, Wisconsin 53706
  • 23Duke University, Durham, North Carolina 27708
  • 24Brandeis University, Waltham, Massachusetts 02254
  • 25Argonne National Laboratory, Argonne, Illinois 60439
  • 26University of Pennsylvania, Philadelphia, Pennsylvania 19104
  • 27University of California at Los Angeles, Los Angeles, California 90024
  • 28University of Pittsburgh, Pittsburgh, Pennsylvania 15260
  • 29University of New Mexico, Albuquerque, New Mexico 87131
  • 30Michigan State University, East Lansing, Michigan 48824
  • 31Istituto Nazionale di Fisica Nucleare, University of Bologna, I-40127 Bologna, Italy
  • 32University of Illinois, Urbana, Illinois 61801
  • 33The Ohio State University, Columbus, Ohio 43210
  • 34University of Geneva, CH-1211 Geneva 4, Switzerland
  • 35Rutgers University, Piscataway, New Jersey 08855
  • 36Texas Tech University, Lubbock, Texas 79409
  • 37Institute of Particle Physics, University of Toronto, Toronto, Canada M5S 1A7
  • 38Tufts University, Medford, Massachusetts 02155
  • 39Texas A&M University, College Station, Texas 77843
  • 40Yale University, New Haven, Connecticut 06520
  • 41University of Florida, Gainesville, Florida 32611
  • 42High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305, Japan
  • 43Hiroshima University, Higashi-Hiroshima 724, Japan
  • 44Institut für Experimentelle Kernphysik, Universität Karlsruhe, 76128 Karlsruhe, Germany
  • 45Osaka City University, Osaka 588, Japan
  • 46Center for High Energy Physics, Kyungpook National University, Taegu 702-701, Korea, Seoul National University, Seoul 151-742, Korea, and SungKyunKwan University, Suwon 440-746, Korea
  • 47Instituto de Fisica de Cantabria, CSIC–University of Cantabria, 39005 Santander, Spain

  • *Now at Northwestern University, Evanston, Illinois 60208.
  • †Now at Carnegie Mellon University, Pittsburgh, Pennsylvania 15213.
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Phys. Rev. D 65, 092002 – Published 22 April, 2002

DOI: https://doi.org/10.1103/PhysRevD.65.092002

Abstract

The growth and development of “charged particle jets” produced in proton-antiproton collisions at 1.8 TeV  are studied over a transverse momentum range from 0.5 GeV/c to 50 GeV/c. A variety of leading (highest transverse momentum) charged jet observables are compared with the QCD Monte Carlo models HERWIG, ISAJET, and PYTHIA. The models describe fairly well the multiplicity distribution of charged particles within the leading charged jet, the size of the leading charged jet, the radial distribution of charged particles and transverse momentum around the leading charged jet direction, and the momentum distribution of charged particles within the leading charged jet. The direction of the leading “charged particle jet” in each event is used to define three regions of η−φ space. The “toward” region contains the leading “charged particle jet,” while the “away” region, on the average, contains the away-side jet. The “transverse” region is perpendicular to the plane of the hard 2-to-2 scattering and is very sensitive to the “underlying event” component of the QCD Monte Carlo models. HERWIG, ISAJET, and PYTHIA with their default parameters do not describe correctly all the properties of the “transverse” region.

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References (8)

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Outline

Information

Phys. Rev. D 65, 092002– Published 22 April, 2002
  • Received 6 July 2001

© 2002 American Physical Society

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