Phys. Rev. D
65,
092002
(2002)
[22 pages]
Charged jet evolution and the underlying event in proton-antiproton collisions at 1.8 TeV
T. Affolder et al. (CDF Collaboration)
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T. Affolder1, H. Akimoto2, A. Akopian3, M. G. Albrow4, P. Amaral5, D. Amidei6, K. Anikeev7, J. Antos8, 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
Received 6 July 2001; published 22 April 2002
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.
© 2002 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.65.092002
DOI:
10.1103/PhysRevD.65.092002
PACS:
13.87.Ce, 12.38.Qk, 13.87.Fh
*Now at Northwestern University, Evanston, Illinois 60208. †Now at Carnegie Mellon University, Pittsburgh, Pennsylvania 15213.
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