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Physics Letters B
Volume 321, Issue 3, 27 January 1994, Pages 283-294
 
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doi:10.1016/0370-2693(94)90478-2    How to Cite or Link Using DOI (Opens New Window)
Copyright © 1994 Published by Elsevier Science B.V. All rights reserved.

A study of four-fermion processes at LEP

L3 Collaboration, A. Adamaq, O. Adrianio, M. Aguilar-Benitezx, S. Ahleni, J. Alcarazp, A. Aloisioaa, G. Alversonj, M. G. Alviggiaa, G. Ambrosiaf, Q. Anq, H. Anderhubat, A. L. Andersonn, V. P. Andreevaj, T. Angelescuj, L. Antonovan, D. Antreasyang, P. Arcex, A. Arefievz, A. Atamanchukaj, T. Azemoonc, T. Azizh, P. V. K. S. Babaq, P. Bagnaiaai, J. A. Bakkenah, R. C. Ballc, S. Banerjeeh, K. Baniczaq, J. Baoe, R. Barillèrep, L. Baroneai, A. Baschirottoy, R. Battistonaf, A. Bayr, F. Becattinio, U. Beckerat, n, F. Behnerat, J. Behrensat, Gy. L. Bencze, J. Berdugox, P. Bergesn, B. Bertucciaf, B. L. Betevat, an, M. Biasiniaf, A. Bilandat, G. M. Bileiaf, R. Bizzarriai, J. J. Blaisingd, G. J. Bobbinkb, p, R. Bocka, A. Böhma, B. Borgiaai, M. Bosettiy, D. Bourilkovac, M. Bourquinr, D. Boutignyp, B. Bouwensb, E. Brambillaaa, J. G. Bransonak, I. C. Brockag, M. Brooksv, A. Bujakaq, J. D. Burgern, W. J. Burgerr, J. Busenitzap, A. Buytenhuijsac, X. D. Caiq, M. Capelln, M. Cariaaf, G. Carlinoaa, A. M. Cartaccio, R. Castelloy, M. Cerradax, F. Cesaroniai, Y. H. Changn, U. K. Chaturvediq, M. Chemarinw, A. Chenav, C. Chenf, G. Chenf, G. M. Chenf, H. F. Chens, H. S. Chenf, M. Chenn, W. Y. Chenav, G. Chiefariaa, C. Y. Chiene, M. T. Choiao, S. Chungn, C. Civininio, I. Claren, R. Claren, T. E. Coanv, H. O. Cohnad, G. Coignetd, N. Colinop, A. Conting, S. Costantiniai, F. Cotorobaij, X. T. Cuiq, X. Y. Cuiq, T. S. Dain, R. D'Alessandroo, R. de Asmundisaa, A. Degréd, K. Deitersar, E. Dénes, P. Denesah, F. DeNotaristefaniai, M. Dhinaat, D. DiBitontoap, M. Diemozai, H. R. Dimitrovan, C. Dionisiai, M. Dittmarat, L. Djambazovat, M. T. Dovaq, E. Dragoaa, D. Duchesneaur, P. Duinkerb, I. Durana, , S. Easoaf, H. El Mamouniw, A. Englerag, F. J. Epplingn, F. C. Ernéb, P. Extermannr, R. Fabbrettiar, M. Fabrear, S. Falcianoai, S. J. Fanam, O. Fackleru, J. Fayw, M. Felcinip, T. Fergusonag, D. Fernandezx, G. Fernandezx, F. Ferroniai, H. Fesefeldta, E. Fiandriniaf, J. H. Fieldr, F. Filthautac, P. H. 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a I. Physikalisches Institut, RWTH, 52056 Aachen FRG; III. Physikalisches Institut, RWTH, 52056, Aachen, FRG b National Institute for High Energy Physics, NIKHEF, NL-1009 DB, Amsterdam, The Netherlands c University of Michigan, Ann Arbor, MI 48109, USA d Laboratoire d'Annecy-le-Vieux de Physique des Particules, LAPP, IN2P3-CNRS, BP 110, F-74941, Annecy-le-Vieux CEDEX, France e Johns Hopkins University, Baltimore, MD 21218, USA f Institute of High Energy Physics, IHEP, 100039, Beijing, China g INFN-Sezione di Bologna, I-40126, Bologna, Italy h Tata Institute of Fundamental Research, Bombay 400 005, India i Boston University, Boston, MA 02215, USA j Northeastern University, Boston, MA 02115, USA j Institute of Atomic Physics and University of Bucharest, R-76900, Bucharest, Romania Central Research Institute for Physics of the Hungarian Academy of Sciences, H-1525, Budapest 114, Hungary m Harvard University, Cambridge, MA 02139, USA n Massachusetts Institute of Technology, Cambridge, MA 02139, USA o INFN Sezione di Firenze and University of Florence, I-50125, Florence, Italy p European Laboratory for Particle Physics, CERN, CH-1211, Geneva 23, Switzerland q World Laboratory, FBLJA Project, CH-1211, Geneva 23, Switzerland r University of Geneva, CH-1211, Geneva 4, Switzerland s Chinese University of Science and Technology, USTC, Hefei, Anhui 230 029, China t University of Lausanne, CH-1015, Lausanne, Switzerland u Lawrence Livermore National Laboratory, Livermore, CA 94550, USA v Los Alamos National Laboratory, Los Alamos, NM 87544, USA w Institut de Physique Nucléaire de Lyon, IN2P3-CNRS, Université Claude Bernard, F-69622, Villeurbanne Cedex, France x Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas, CIEMAT, E-28040, Madrid, Spain y INFN-Sezione de Milano, I-20133, Milan, Italy z Institute of Theoretical and Experimental Physics, ITEP, Moscow, Russia aa INFN-Sezione di Napoli and University of Naples, I-80125, Naples, Italy ab Department of Natural Sciences, University of Cyprus, Nicosia, Cyprus ac University of Nymegen and NIKHEF, NL-6525 ED, Nymegen, The Netherlands ad Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA ae California Institute of Technology, Pasadena, CA 91125, USA af INFN-Sezione di Perugia and Universitá Degli Studi di Perugia, I-06100, Perugia, Italy ag Carnegie Mellon University, Pittsburgh, PA 15213, USA ah Princeton University, Princeton, NJ 08544, USA ai INFN-Sezione di Roma and University of Rome, “La Sapienza”, I-00185, Rome, Italy aj Nuclear Physics Institute, St. Petersburg, Russia ak University of California, San Diego, CA 92093, USA aℓ Dept. de Fisica de Particulas Elementales, Univ. de Santiago, E-15706 Santiago de Compostela, Spain am Shanghai Institute of Ceramics, SIC, Shanghai, China an Bulgarian Academy of Sciences, Institute of Mechatronics, BU-1113, Sofia, Bulgaria ao Center for High Energy Physics, Korea Advanced Inst. of Sciences and Technology, 305-701, Taejon, Republic of Korea ap University of Alabama, Tuscaloosa, AL 35486, USA aq Purdue University, West Lafayette, IN 47907, USA ar Paul Scherrer Institut, PSI, CH-5232, Villigen, Switzerland as DESY-Institut für Hochenergiephysik, 15738, Zeuthen, FRG at Eidgenössische Technische Hochschule, ETH Zürich, CH-8093, Zürich, Switzerland au University of Hamburg, 22761, Hamburg, FRG av High Energy Physics Group, Taiwan, China

Received 26 November 1993. 
Editor: K. Winter 
Available online 29 October 2002.

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Abstract

We have studied the four-fermion processes ee → eeee, eeμμ, eeττ, μμμμ, μμττ, eeqq and μμqq with the L3 detector at LEP. For an integrated luminosity of 36 pb, corresponding to 960 000 hadronic Z decays, we find a total of 67 candidate events. The rate and kinematical distributions are found to be consistent with first order Monte Carlo calculations based on the Standard Model. No significant structure is seen in the dilepton invariant or recoil mass spectra.

Article Outline

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Physics Letters B
Volume 321, Issue 3, 27 January 1994, Pages 283-294
 
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