Phys. Rev. D
65,
052007
(2002)
[26 pages]
Study of the heavy flavor content of jets produced in association with W bosons in pp̅ collisions at √s=1.8TeV
D. Acosta et al. (CDF Collaboration)
Show All Authors/Affiliations
Hide All Authors/Affiliations
D. Acosta12, T. Affolder23, H. Akimoto44, A. Akopian36, P. Amaral8, D. Ambrose31, D. Amidei25, K. Anikeev24, J. Antos1, G. Apollinari11, T. Arisawa44, A. Artikov9, T. Asakawa42, W. Ashmanskas8, F. Azfar29, P. Azzi-Bacchetta30, N. Bacchetta30, H. Bachacou23, S. Bailey16, P. de Barbaro35, A. Barbaro-Galtieri23, V. E. Barnes34, B. A. Barnett19, S. Baroiant5, M. Barone13, G. Bauer24, F. Bedeschi32, S. Belforte41, W. H. Bell15, G. Bellettini32, J. Bellinger45, D. Benjamin10, J. Bensinger4, A. Beretvas11, J. P. Berge11, J. Berryhill8, A. Bhatti36, M. Binkley11, D. Bisello30, M. Bishai11, R. E. Blair2, C. Blocker4, K. Bloom25, B. Blumenfeld19, S. R. Blusk35, A. Bocci36, A. Bodek35, G. Bolla34, Y. Bonushkin6, D. Bortoletto34, J. Boudreau33, A. Brandl27, S. van den Brink19, C. Bromberg26, M. Brozovic10, E. Brubaker23, N. Bruner27, E. Buckley-Geer11, J. Budagov9, H. S. Budd35, K. Burkett16, G. Busetto30, A. Byon-Wagner11, K. L. Byrum2, S. Cabrera10, P. Calafiura23, M. Campbell25, W. Carithers23, J. Carlson25, D. Carlsmith45, W. Caskey5, A. Castro3, D. Cauz41, A. Cerri32, J. Chapman25, C. Chen31, Y. C. Chen1, M. Chertok5, G. Chiarelli32, I. Chirikov-Zorin9, G. Chlachidze9, F. Chlebana11, L. Christofek18, Y. S. Chung35, A. G. Clark14, A. P. Colijn11, A. Connolly23, M. Cordelli13, J. Cranshaw39, R. Cropp40, D. Dagenhart43, S. D’Auria15, F. DeJongh11, S. Dell’Agnello13, M. Dell’Orso32, S. Demers36, L. Demortier36, M. Deninno3, P. F. Derwent11, J. R. Dittmann11, A. Dominguez23, S. Donati32, J. Done38, M. D’Onofrio32, T. Dorigo16, N. Eddy18, K. Einsweiler23, J. E. Elias11, E. Engels, Jr.33, R. Erbacher11, D. Errede18, S. Errede18, Q. Fan35, H.-C. Fang23, R. G. Feild46, J. P. Fernandez11, C. Ferretti32, R. D. Field12, I. Fiori3, B. Flaugher11, G. W. Foster11, M. Franklin16, J. Freeman11, J. Friedman24, Y. Fukui22, I. Furic24, S. Galeotti32, A. Gallas16,*, M. Gallinaro36, T. Gao31, A. F. Garfinkel34, P. Gatti30, C. Gay46, D. W. Gerdes25, P. Giannetti32, P. Giromini13, V. Glagolev9, D. Glenzinski11, M. Gold27, J. Goldstein11, I. Gorelov27, A. T. Goshaw10, Y. Gotra33, K. Goulianos36, C. Green34, G. Grim5, P. Gris11, C. Grosso-Pilcher8, M. Guenther34, G. Guillian25, J. Guimaraes da Costa16, R. M. Haas12, C. Haber23, S. R. Hahn11, C. Hall16, T. Handa17, R. Handler45, W. Hao39, F. Happacher13, K. Hara42, A. D. Hardman34, R. M. Harris11, F. Hartmann20, K. Hatakeyama36, J. Hauser6, J. Heinrich31, A. Heiss20, M. Herndon19, C. Hill5, A. Hocker35, K. D. Hoffman34, R. Hollebeek31, L. Holloway18, B. T. Huffman29, J. Huston26, J. Huth16, H. Ikeda42, J. Incandela11,†, G. Introzzi32, A. Ivanov35, J. Iwai44, Y. Iwata17, E. James25, M. Jones31, U. Joshi11, H. Kambara14, T. Kamon38, T. Kaneko42, K. Karr43, S. Kartal11, H. Kasha46, Y. Kato28, T. A. Keaffaber34, K. Kelley24, M. Kelly25, D. Khazins10, T. Kikuchi42, B. Kilminster35, B. J. Kim21, D. H. Kim21, H. S. Kim18, M. J. Kim21, S. B. Kim21, S. H. Kim42, Y. K. Kim23, M. Kirby10, M. Kirk4, L. Kirsch4, S. Klimenko12, K. Kondo44, J. Konigsberg12, A. Korn24, A. Korytov12, E. Kovacs2, J. Kroll31, M. Kruse10, S. E. Kuhlmann2, K. Kurino17, T. Kuwabara42, A. T. Laasanen34, N. Lai8, S. Lami36, S. Lammel11, J. Lancaster10, M. Lancaster23, R. Lander5, A. Lath37, G. Latino32, A. M. Lee, IV10, K. Lee39, S. Leone32, M. Lindgren6, J. B. Liu35, D. O. Litvintsev11, O. Lobban39, N. Lockyer31, J. Loken29, M. Loreti30, D. Lucchesi30, P. Lukens11, S. Lusin45, L. Lyons29, J. Lys23, R. Madrak16, K. Maeshima11, P. Maksimovic16, L. Malferrari3, M. Mangano32, M. Mariotti30, G. Martignon30, A. Martin46, J. A. J. Matthews27, J. Mayer40, P. Mazzanti3, K. S. McFarland35, P. McIntyre38, M. Menguzzato30, A. Menzione32, P. Merkel11, C. Mesropian36, A. Meyer11, T. Miao11, R. Miller26, J. S. Miller25, H. Minato42, S. Miscetti13, M. Mishina22, G. Mitselmakher12, N. Moggi3, E. Moore27, R. Moore25, Y. Morita22, T. Moulik34, M. Mulhearn24, A. Mukherjee11, T. Muller20, A. Munar32, P. Murat11, S. Murgia26, J. Nachtman6, V. Nagaslaev39, S. Nahn46, H. Nakada42, I. Nakano17, C. Nelson11, D. Neuberger20, C. Newman-Holmes11, C.-Y. P. Ngan24, H. Niu4, L. Nodulman2, A. Nomerotski12, S. H. Oh10, Y. D. Oh21, T. Ohmoto17, T. Ohsugi17, R. Oishi42, T. Okusawa28, J. Olsen45, W. Orejudos23, C. Pagliarone32, F. Palmonari32, R. Paoletti32, V. Papadimitriou39, A. Parri13, D. Partos4, J. Patrick11, G. Pauletta41, C. Paus24, D. Pellett5, L. Pescara30, T. J. Phillips10, G. Piacentino32, K. T. Pitts18, A. Pompos34, L. Pondrom45, G. Pope33, M. Popovic40, F. Prokoshin9, J. Proudfoot2, F. Ptohos13, O. Pukhov9, G. Punzi32, A. Rakitine24, F. Ratnikov37, D. Reher23, A. Reichold29, P. Renton29, A. Ribon30, W. Riegler16, F. Rimondi3, L. Ristori32, M. Riveline40, W. J. Robertson10, A. Robinson40, T. Rodrigo7, S. Rolli43, L. Rosenson24, R. Roser11, R. Rossin30, C. Rott34, A. Roy34, A. Ruiz7, A. Safonov5, R. St. Denis15, W. K. Sakumoto35, D. Saltzberg6, A. Sansoni13, L. Santi41, H. Sato42, P. Savard40, A. Savoy-Navarro11, P. Schlabach11, E. E. Schmidt11, M. P. Schmidt46, M. Schmitt16,*, L. Scodellaro30, A. Scott6, A. Scribano32, S. Segler11, S. Seidel27, Y. Seiya42, A. Semenov9, F. Semeria3, T. Shah24, M. D. Shapiro23, P. F. Shepard33, T. Shibayama42, M. Shimojima42, M. Shochet8, A. Sidoti30, J. Siegrist23, P. Sinervo40, P. Singh18, A. J. Slaughter46, K. Sliwa43, C. Smith19, F. D. Snider11, A. Solodsky36, J. Spalding11, T. Speer14, P. Sphicas24, F. Spinella32, M. Spiropulu8, L. Spiegel11, J. Steele45, A. Stefanini32, J. Strologas18, F. Strumia14, K. Sumorok24, T. Suzuki42, T. Takano28, R. Takashima17, K. Takikawa42, P. Tamburello10, M. Tanaka42, B. Tannenbaum6, M. Tecchio25, R. J. Tesarek11, K. Terashi36, S. Tether24, A. S. Thompson15, R. Thurman-Keup2, P. Tipton35, S. Tkaczyk11, D. Toback38, K. Tollefson35, A. Tollestrup11, D. Tonelli32, W. Trischuk40, J. F. de Troconiz16, J. Tseng24, D. Tsybychev11, N. Turini32, F. Ukegawa42, T. Vaiciulis35, J. Valls37, G. Velev11, G. Veramendi23, I. Vila7, R. Vilar7, M. von der Mey6, D. Vucinic24, R. G. Wagner2, R. L. Wagner11, N. B. Wallace37, Z. Wan37, C. Wang10, M. J. Wang1, S. M. Wang12, B. Ward15, S. Waschke15, T. Watanabe42, D. Waters29, T. Watts37, R. Webb38, H. Wenzel20, A. B. Wicklund2, E. Wicklund11, T. Wilkes5, H. H. Williams31, P. Wilson11, D. Winn25, S. Wolbers11, D. Wolinski25, J. Wolinski26, S. Wolinski25, S. Worm37, X. Wu14, J. Wyss32, W. Yao23, P. Yeh1, J. Yoh11, C. Yosef26, T. Yoshida28, I. Yu21, S. Yu31, Z. Yu46, A. Zanetti41, F. Zetti23, and S. Zucchelli3
1Institute of Physics, Academia Sinica, Taipei, Taiwan 11529, Republic of China 2Argonne National Laboratory, Argonne, Illinois 60439 3Istituto Nazionale di Fisica Nucleare, University of Bologna, I-40127 Bologna, Italy 4Brandeis University, Waltham, Massachusetts 02254 5University of California at Davis, Davis, California 95616 6University of California at Los Angeles, Los Angeles, California 90024 7Instituto de Fisica de Cantabria, CSIC–University of Cantabria, 39005 Santander, Spain 8Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637 9Joint Institute for Nuclear Research, RU-141980 Dubna, Russia 10Duke University, Durham, North Carolina 27708 11Fermi National Accelerator Laboratory, Batavia, Illinois 60510 12University of Florida, Gainesville, Florida 32611 13Laboratori Nazionali di Frascati, Istituto Nazionale di Fisica Nucleare, I-00044 Frascati, Italy 14University of Geneva, CH-1211 Geneva 4, Switzerland 15Glasgow University, Glasgow G12 8QQ, United Kingdom 16Harvard University, Cambridge, Massachusetts 02138 17Hiroshima University, Higashi-Hiroshima 724, Japan 18University of Illinois, Urbana, Illinois 61801 19The Johns Hopkins University, Baltimore, Maryland 21218 20Institut für Experimentelle Kernphysik, Universität Karlsruhe, 76128 Karlsruhe, Germany 21Center for High Energy Physics, Kyungpook National University, Taegu 702-701, Korea,Seoul National University, Seoul 151-742, Korea,SungKyunKwan University, Suwon 440-746, Korea 22High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305, Japan 23Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94720 24Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 25University of Michigan, Ann Arbor, Michigan 48109 26Michigan State University, East Lansing, Michigan 48824 27University of New Mexico, Albuquerque, New Mexico 87131 28Osaka City University, Osaka 588, Japan 29University of Oxford, Oxford OX1 3RH, United Kingdom 30Universita di Padova, Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 Padova, Italy 31University of Pennsylvania, Philadelphia, Pennsylvania 19104 32Istituto Nazionale di Fisica Nucleare, University and Scuola Normale Superiore of Pisa, I-56100 Pisa, Italy 33University of Pittsburgh, Pittsburgh, Pennsylvania 15260 34Purdue University, West Lafayette, Indiana 47907 35University of Rochester, Rochester, New York 14627 36Rockefeller University, New York, New York 10021 37Rutgers University, Piscataway, New Jersey 08855 38Texas A&M University, College Station, Texas 77843 39Texas Tech University, Lubbock, Texas 79409 40Institute of Particle Physics, University of Toronto, Toronto M5S 1A7, Canada 41Istituto Nazionale di Fisica Nucleare, University of Trieste/Udine, Italy 42University of Tsukuba, Tsukuba, Ibaraki 305, Japan 43Tufts University, Medford, Massachusetts 02155 44Waseda University, Tokyo 169, Japan 45University of Wisconsin, Madison, Wisconsin 53706 46Yale University, New Haven, Connecticut 06520
Received 14 September 2001; published 7 February 2002
We present a detailed examination of the heavy flavor content of the W+jet data sample collected with the Collider Detector at Fermilab during the 1992–1995 collider run at the Fermilab Tevatron. Jets containing heavy flavor quarks are selected via the identification of secondary vertices or semileptonic decays of b and c quarks. There is generally good agreement between the rates of secondary vertices and soft leptons in the data and in the standard model simulation including single and pair production of top quarks. An exception is the number of events in which a single jet has both a soft lepton and a secondary vertex tag. In W+2,3 jet data, we find 13 such events where we expected 4.4±0.6 events. The kinematic properties of this small sample of events are statistically difficult to reconcile with the simulation of standard model processes.
© 2002 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.65.052007
DOI:
10.1103/PhysRevD.65.052007
PACS:
13.85.Qk, 13.20.He, 13.38.Be
*Present address: Northwestern University, Evanston, Illinois 60208. †Present address: University of California, Santa Barbara, CA 93106.
|
|