Phys. Rev. Lett.
85,
2056–2061
(2000)
Search for Second and Third Generation Leptoquarks Including Production via Technicolor Interactions in pp̅ Collisions at √s = 1.8TeV
T. Affolder et al. (CDF Collaboration)
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T. Affolder21, H. Akimoto43, A. Akopian36, M. G. Albrow10, P. Amaral7, S. R. Amendolia32, D. Amidei24, K. Anikeev22, J. Antos1, G. Apollinari10, T. Arisawa43, T. Asakawa41, W. Ashmanskas7, M. Atac10, F. Azfar29, P. Azzi-Bacchetta30, N. Bacchetta30, M. W. Bailey26, S. Bailey14, P. de Barbaro35, A. Barbaro-Galtieri21, V. E. Barnes34, B. A. Barnett17, M. Barone12, G. Bauer22, F. Bedeschi32, S. Belforte40, G. Bellettini32, J. Bellinger44, D. Benjamin9, J. Bensinger4, A. Beretvas10, J. P. Berge10, J. Berryhill7, B. Bevensee31, A. Bhatti36, M. Binkley10, D. Bisello30, R. E. Blair2, C. Blocker4, K. Bloom24, B. Blumenfeld17, S. R. Blusk35, A. Bocci32, A. Bodek35, W. Bokhari31, G. Bolla34, Y. Bonushkin5, D. Bortoletto34, J. Boudreau33, A. Brandl26, S. van den Brink17, C. Bromberg25, M. Brozovic9, N. Bruner26, E. Buckley-Geer10, J. Budagov8, H. S. Budd35, K. Burkett14, G. Busetto30, A. Byon-Wagner10, K. L. Byrum2, P. Calafiura21, M. Campbell24, W. Carithers21, J. Carlson24, D. Carlsmith44, J. Cassada35, A. Castro30, D. Cauz40, A. Cerri32, A. W. Chan1, P. S. Chang1, P. T. Chang1, J. Chapman24, C. Chen31, Y. C. Chen1, M.-T. Cheng1, M. Chertok38, G. Chiarelli32, I. Chirikov-Zorin8, G. Chlachidze8, F. Chlebana10, L. Christofek16, M. L. Chu1, C. I. Ciobanu27, A. G. Clark13, A. Connolly21, J. Conway37, J. Cooper10, M. Cordelli12, J. Cranshaw39, D. Cronin-Hennessy9, R. Cropp23, R. Culbertson7, D. Dagenhart42, F. DeJongh10, S. Dell'Agnello12, M. Dell'Orso32, R. Demina10, L. Demortier36, M. Deninno3, P. F. Derwent10, T. Devlin37, J. R. Dittmann10, S. Donati32, J. Done38, T. Dorigo14, N. Eddy16, K. Einsweiler21, J. E. Elias10, E. Engels, Jr.33, W. Erdmann10, D. Errede16, S. Errede16, Q. Fan35, R. G. Feild45, C. Ferretti32, R. D. Field11, I. Fiori3, B. Flaugher10, G. W. Foster10, M. Franklin14, J. Freeman10, J. Friedman22, Y. Fukui20, S. Galeotti32, M. Gallinaro36, T. Gao31, M. Garcia-Sciveres21, A. F. Garfinkel34, P. Gatti30, C. Gay45, S. Geer10, D. W. Gerdes24, P. Giannetti32, P. Giromini12, V. Glagolev8, M. Gold26, J. Goldstein10, A. Gordon14, A. T. Goshaw9, Y. Gotra33, K. Goulianos36, C. Green34, L. Groer37, C. Grosso-Pilcher7, M. Guenther34, G. Guillian24, J. Guimaraes da Costa14, R. S. Guo1, R. M. Haas11, C. Haber21, E. Hafen22, S. R. Hahn10, C. Hall14, T. Handa15, R. Handler44, W. Hao39, F. Happacher12, K. Hara41, A. D. Hardman34, R. M. Harris10, F. Hartmann18, K. Hatakeyama36, J. Hauser5, J. Heinrich31, A. Heiss18, M. Herndon17, B. Hinrichsen23, K. D. Hoffman34, C. Holck31, R. Hollebeek31, L. Holloway16, R. Hughes27, J. Huston25, J. Huth14, H. Ikeda41, J. Incandela10, G. Introzzi32, J. Iwai43, Y. Iwata15, E. James24, H. Jensen10, M. Jones31, U. Joshi10, H. Kambara13, T. Kamon38, T. Kaneko41, K. Karr42, H. Kasha45, Y. Kato28, T. A. Keaffaber34, K. Kelley22, M. Kelly24, R. D. Kennedy10, R. Kephart10, D. Khazins9, T. Kikuchi41, B. Kilminster35, M. Kirby9, M. Kirk4, B. J. Kim19, D. H. Kim19, H. S. Kim16, M. J. Kim19, S. H. Kim41, Y. K. Kim21, L. Kirsch4, S. Klimenko11, P. Koehn27, A. Köngeter18, K. Kondo43, J. Konigsberg11, K. Kordas23, A. Korn22, A. Korytov11, E. Kovacs2, J. Kroll31, M. Kruse35, S. E. Kuhlmann2, K. Kurino15, T. Kuwabara41, A. T. Laasanen34, N. Lai7, S. Lami36, S. Lammel10, J. I. Lamoureux4, M. Lancaster21, G. Latino32, T. LeCompte2, A. M. Lee IV9, K. Lee39, S. Leone32, J. D. Lewis10, M. Lindgren5, T. M. Liss16, J. B. Liu35, Y. C. Liu1, N. Lockyer31, J. Loken29, M. Loreti30, D. Lucchesi30, P. Lukens10, S. Lusin44, L. Lyons29, J. Lys21, R. Madrak14, K. Maeshima10, P. Maksimovic14, L. Malferrari3, M. Mangano32, M. Mariotti30, G. Martignon30, A. Martin45, J. A. J. Matthews26, J. Mayer23, P. Mazzanti3, K. S. McFarland35, P. McIntyre38, E. McKigney31, M. Menguzzato30, A. Menzione32, C. Mesropian36, T. Miao10, R. Miller25, J. S. Miller24, H. Minato41, S. Miscetti12, M. Mishina20, G. Mitselmakher11, N. Moggi3, E. Moore26, R. Moore24, Y. Morita20, A. Mukherjee10, T. Muller18, A. Munar32, P. Murat10, S. Murgia25, M. Musy40, J. Nachtman5, S. Nahn45, H. Nakada41, T. Nakaya7, I. Nakano15, C. Nelson10, D. Neuberger18, C. Newman-Holmes10, C.-Y. P. Ngan22, P. Nicolaidi40, H. Niu4, L. Nodulman2, A. Nomerotski11, S. H. Oh9, T. Ohmoto15, T. Ohsugi15, R. Oishi41, T. Okusawa28, J. Olsen44, W. Orejudos21, C. Pagliarone32, F. Palmonari32, R. Paoletti32, V. Papadimitriou39, S. P. Pappas45, D. Partos4, J. Patrick10, G. Pauletta40, M. Paulini21, C. Paus22, L. Pescara30, T. J. Phillips9, G. Piacentino32, K. T. Pitts16, R. Plunkett10, A. Pompos34, L. Pondrom44, G. Pope33, M. Popovic23, F. Prokoshin8, J. Proudfoot2, F. Ptohos12, O. Pukhov8, G. Punzi32, K. Ragan23, A. Rakitine22, D. Reher21, A. Reichold29, W. Riegler14, A. Ribon30, F. Rimondi3, L. Ristori32, W. J. Robertson9, A. Robinson23, T. Rodrigo6, S. Rolli42, L. Rosenson22, R. Roser10, R. Rossin30, W. K. Sakumoto35, D. Saltzberg5, A. Sansoni12, L. Santi40, H. Sato41, P. Savard23, P. Schlabach10, E. E. Schmidt10, M. P. Schmidt45, M. Schmitt14, L. Scodellaro30, A. Scott5, A. Scribano32, S. Segler10, S. Seidel26, Y. Seiya41, A. Semenov8, F. Semeria3, T. Shah22, M. D. Shapiro21, P. F. Shepard33, T. Shibayama41, M. Shimojima41, M. Shochet7, J. Siegrist21, G. Signorelli32, A. Sill39, P. Sinervo23, P. Singh16, A. J. Slaughter45, K. Sliwa42, C. Smith17, F. D. Snider10, A. Solodsky36, J. Spalding10, T. Speer13, P. Sphicas22, F. Spinella32, M. Spiropulu14, L. Spiegel10, J. Steele44, A. Stefanini32, J. Strologas16, F. Strumia13, D. Stuart10, K. Sumorok22, T. Suzuki41, T. Takano28, R. Takashima15, K. Takikawa41, P. Tamburello9, M. Tanaka41, B. Tannenbaum5, W. Taylor23, M. Tecchio24, P. K. Teng1, K. Terashi41, S. Tether22, D. Theriot10, R. Thurman-Keup2, P. Tipton35, S. Tkaczyk10, K. Tollefson35, A. Tollestrup10, H. Toyoda28, W. Trischuk23, J. F. de Troconiz14, J. Tseng22, N. Turini32, F. Ukegawa41, T. Vaiciulis35, J. Valls37, S. Vejcik III10, G. Velev10, R. Vidal10, R. Vilar6, I. Volobouev21, D. Vucinic22, R. G. Wagner2, R. L. Wagner10, J. Wahl7, N. B. Wallace37, A. M. Walsh37, C. Wang9, C. H. Wang1, M. J. Wang1, T. Watanabe41, D. Waters29, T. Watts37, R. Webb38, H. Wenzel18, W. C. Wester III10, A. B. Wicklund2, E. Wicklund10, H. H. Williams31, P. Wilson10, B. L. Winer27, D. Winn24, S. Wolbers10, D. Wolinski24, J. Wolinski25, S. Wolinski24, S. Worm26, X. Wu13, J. Wyss32, A. Yagil10, W. Yao21, G. P. Yeh10, P. Yeh1, J. Yoh10, C. Yosef25, T. Yoshida28, I. Yu19, S. Yu31, Z. Yu45, A. Zanetti40, F. Zetti21, and S. Zucchelli3 (CDF Collaboration)
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 Los Angeles, Los Angeles, California 90024
6Instituto de Fisica de Cantabria, University of Cantabria, 39005 Santander, Spain
7Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637
8Joint Institute for Nuclear Research, RU-141980 Dubna, Russia
9Duke University, Durham, North Carolina 27708
10Fermi National Accelerator Laboratory, Batavia, Illinois 60510
11University of Florida, Gainesville, Florida 32611
12Laboratori Nazionali di Frascati, Istituto Nazionale di Fisica Nucleare, I-00044 Frascati, Italy
13University of Geneva, CH-1211 Geneva 4, Switzerland
14Harvard University, Cambridge, Massachusetts 02138
15Hiroshima University, Higashi-Hiroshima 724, Japan
16University of Illinois, Urbana, Illinois 61801
17The Johns Hopkins University, Baltimore, Maryland 21218
18Institut für Experimentelle Kernphysik, Universität Karlsruhe, 76128 Karlsruhe, Germany
19Korean Hadron Collider Laboratory, Kyungpook National University, Taegu 702-701, Korea, Seoul National University, Seoul 151-742, Korea, and SungKyunKwan University, Suwon 440-746, Korea
20High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305, Japan
21Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94720
22Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
23Institute of Particle Physics, McGill University, Montreal H3A 2T8, Canada and University of Toronto, Toronto M5S 1A7, Canada
24University of Michigan, Ann Arbor, Michigan 48109
25Michigan State University, East Lansing, Michigan 48824
26University of New Mexico, Albuquerque, New Mexico 87131
27The Ohio State University, Columbus, Ohio 43210
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
40Istituto Nazionale di Fisica Nucleare, University of Trieste/Udine, Italy
41University of Tsukuba, Tsukuba, Ibaraki 305, Japan
42Tufts University, Medford, Massachusetts 02155
43Waseda University, Tokyo 169, Japan
44University of Wisconsin, Madison, Wisconsin 53706
45Yale University, New Haven, Connecticut 06520
Received 3 April 2000; published in the issue dated 4 September 2000
We report the results of a search for second and third generation leptoquarks using 88pb-1 of data recorded by the Collider Detector at Fermilab. Color triplet technipions, which play the role of scalar leptoquarks, are investigated due to their potential production in decays of strongly coupled color octet technirhos. Events with a signature of two heavy flavor jets and missing energy may indicate the decay of a second (third) generation leptoquark to a charm (bottom) quark and a neutrino. As the data are found to be consistent with standard model expectations, mass limits are determined.
© 2000 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.85.2056
DOI:
10.1103/PhysRevLett.85.2056
PACS:
13.85.Rm, 12.60.Nz, 14.80.-j
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