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Neutral-current four-fermion production in e+e- interactions at LEP

  • P. Achard
  • , O. Adriani
  • , M. Aguilar-Benitez
  • , J. Alcaraz
  • , G. Alemanni
  • , J. Allaby
  • , A. Aloisio
  • , M. G. Alviggi
  • , H. Anderhub
  • , V. P. Andreev
  • , F. Anselmo
  • , A. Arefiev
  • , T. Azemoon
  • , T. Aziz
  • , P. Bagnaia
  • , A. Bajo
  • , G. Baksay
  • , L. Baksay
  • , S. V. Baldew
  • , S. Banerjee
  • Sw Banerjee, A. Barczyk, R. Barillère, P. Bartalini, M. Basile, N. Batalova, R. Battiston, A. Bay, F. Becattini, U. Becker, F. Behner, L. Bellucci, R. Berbeco, J. Berdugo, P. Berges, B. Bertucci, B. L. Betev, M. Biasini, M. Biglietti, A. Biland, J. J. Blaising, S. C. Blyth, G. J. Bobbink, A. Böhm, L. Boldizsar, B. Borgia, S. Bottai, D. Bourilkov, M. Bourquin, S. Braccini, J. G. Branson, F. Brochu, J. D. Burger, W. J. Burger, X. D. Cai, M. Capell, G. Cara Romeo, G. Carlino, A. Cartacci, J. Casaus, F. Cavallari, N. Cavallo, C. Cecchi, M. Cerrada, M. Chamizo, Y. H. Chang, M. Chemarin, A. Chen, G. Chen, G. M. Chen, H. F. Chen, H. S. Chen, G. Chiefari, L. Cifarelli, F. Cindolo, I. Clare, R. Clare, G. Coignet, N. Colino, S. Costantini, B. De La Cruz, S. Cucciarelli, R. De Asmundis, P. Déglon, J. Debreczeni, A. Degré, K. Dehmelt, K. Deiters, D. Della Volpe, E. Delmeire, P. Denes, F. DeNotaristefani, A. De Salvo, M. Diemoz, M. Dierckxsens, C. Dionisi, M. Dittmar, A. Doria, M. T. Dova, D. Duchesneau, M. Duda, B. Echenard, A. Eline, A. El Hage, H. El Mamouni, A. Engler, F. J. Eppling, P. Extermann, M. A. Falagan, S. Falciano, A. Favara, J. Fay, O. Fedin, M. Felcini, T. Ferguson, H. Fesefeldt, E. Fiandrini, J. H. Field, F. Filthaut, P. H. Fisher, W. Fisher, I. Fisk, G. Forconi, K. Freudenreich, C. Furetta, Yu Galaktionov, S. N. Ganguli, P. Garcia-Abia, M. Gataullin, S. Gentile, S. Giagu, Z. F. Gong, G. Grenier, O. Grimm, M. W. Gruenewald, M. Guida, V. K. Gupta, A. Gurtu, L. J. Gutay, D. Haas, D. Hatzifotiadou, T. Hebbeker, A. Hervé, J. Hirschfelder, H. Hofer, M. Hohlmann, G. Holzner, S. R. Hou, B. N. Jin, P. Jindal, L. W. Jones, P. De Jong, I. Josa-Mutuberría, M. Kaur, M. N. Kienzle-Focacci, J. K. Kim, J. Kirkby, W. Kittel, A. Klimentov, A. C. König, M. Kopal, V. Koutsenko, M. Kräber, R. W. Kraemer, A. Krüger, A. Kunin, P. Ladron De Guevara, I. Laktineh, G. Landi, M. Lebeau, A. Lebedev, P. Lebrun, P. Lecomte, P. Lecoq, P. Le Coultre, J. M. Le Goff, R. Leiste, M. Levtchenko, P. Levtchenko, C. Li, S. Likhoded, C. H. Lin, W. T. Lin, F. L. Linde, L. Lista, Z. A. Liu, W. Lohmann, E. Longo, Y. S. Lu, C. Luci, L. Luminari, W. Lustermann, W. G. Ma, L. Malgeri, A. Malinin, C. Maña, J. Mans, J. P. Martin, F. Marzano, K. Mazumdar, R. R. McNeil, S. Mele, L. Merola, M. Meschini, W. J. Metzger, A. Mihul, H. Milcent, G. Mirabelli, J. Mnich, G. B. Mohanty, G. S. Muanza, A. J.M. Muijs, B. Musicar, M. Musy, S. Nagy, S. Natale, M. Napolitano, F. Nessi-Tedaldi, H. Newman, A. Nisati, T. Novak, H. Nowak, R. Ofierzynski, G. Organtini, I. Pal, C. Palomares, P. Paolucci, R. Paramatti, G. Passaleva, S. Patricelli, T. Paul, M. Pauluzzi, C. Paus, F. Pauss, M. Pedace, S. Pensotti, D. Perret-Gallix, D. Piccolo, F. Pierella, M. Pioppi, P. A. Piroué, E. Pistolesi, V. Plyaskin, M. Pohl, V. Pojidaev, J. Pothier, D. Prokofiev, G. Rahal-Callot, M. A. Rahaman, P. Raics, N. Raja, R. Ramelli, P. G. Rancoita, R. Ranieri, A. Raspereza, P. Razis, D. Ren, M. Rescigno, S. Reucroft, S. Riemann, K. Riles, B. P. Roe, L. Romero, A. Rosca, C. Rosemann, C. Rosenbleck, S. Rosier-Lees, S. Roth, B. Roux, J. A. Rubio, G. Ruggiero, H. Rykaczewski, A. Sakharov, S. Saremi, S. Sarkar, J. Salicio, E. Sanchez, C. Schäfer, V. Schegelsky, H. Schopper, D. J. Schotanus, C. Sciacca, L. Servoli, S. Shevchenko, N. Shivarov, V. Shoutko, E. Shumilov, A. Shvorob, D. Son, C. Souga, P. Spillantini, M. Steuer, D. P. Stickland, B. Stoyanov, A. Straessner, K. Sudhakar, G. Sultanov, L. Z. Sun, S. Sushkov, H. Suter, J. D. Swain, Z. Szillasi, X. W. Tang, P. Tarjan, L. Tauscher, L. Taylor, B. Tellili, D. Teyssier, C. Timmermans, Samuel C.C. Ting, S. M. Ting, S. C. Tonwar, J. Tóth, C. Tully, K. L. Tung, J. Ulbricht, E. Valente, R. T. Van De Walle, R. Vasquez, V. Veszpremi, G. Vesztergombi, I. Vetlitsky, G. Viertel, S. Villa, M. Vivargent, S. Vlachos, I. Vodopianov, H. Vogel, H. Vogt, I. Vorobiev, A. A. Vorobyov, M. Wadhwa, Q. Wang, X. L. Wang, Z. M. Wang, M. Weber, S. Wynhoff, L. Xia, Z. Z. Xu, J. Yamamoto, B. Z. Yang, C. G. Yang, H. J. Yang, M. Yang, S. C. Yeh, An Zalite, Yu Zalite, Z. P. Zhang, J. Zhao, G. Y. Zhu, R. Y. Zhu, H. L. Zhuang, A. Zichichi, B. Zimmermann, M. Zöller
  • University of Geneva
  • University of Florence
  • CIEMAT
  • University of Lausanne
  • CERN
  • National Institute for Nuclear Physics
  • Swiss Federal Institute of Technology Zurich
  • Louisiana State University
  • Petersburg Nuclear Physics InstituteGatchina
  • University of Bologna
  • Alikhanov Institute for Theoretical and Experimental Physics
  • University of Michigan, Ann Arbor
  • Tata Institute of Fundamental Research
  • University of Rome La Sapienza
  • Florida Institute of Technology
  • University of Amsterdam
  • IN2P3-CNRS
  • Paul Scherrer Institute
  • Purdue University
  • University of Perugia
  • Massachusetts Institute of Technology
  • Carnegie Mellon University
  • RWTH Aachen University
  • Hungarian Academy of Sciences
  • University of California at San Diego
  • University of Basilicata
  • National Central University
  • Universite Claude Bernard Lyon 1
  • CAS - Institute of High Energy Physics
  • University of Science and Technology of China
  • University of Salerno
  • University of California at Riverside
  • Princeton University
  • Northeastern University
  • California Institute of Technology
  • Radboud University Nijmegen
  • University College Dublin
  • University of Basel
  • Panjab University
  • Kyungpook National University
  • German Electron Synchrotron
  • University of Bucharest
  • Institute for Nuclear Research
  • University of Cyprus
  • University of Hamburg
  • Bulgarian Academy of Sciences
  • National Tsing Hua University
  • ICSC - World Laboratory

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Neutral-current four-fermion production, e+e -→ff̄f′f̄′, is studied in 0.7 fb -1 of data collected with the L3 detector at LEP at centre-of-mass energies s=183-209 GeV. Four final states are considered: qq̄νν̄ , qq̄ℓ+ℓ-, ℓ+ℓ-ℓ′+ℓ′- and ℓ+ℓ-νν̄, where ℓ denotes either an electron or a muon. Their cross sections are measured and found to agree with the Standard Model predictions. In addition, the e+e-→Zγ *→ff̄f′f̄′ process is studied and its total cross section at the average centre-of-mass energy 〈s〉=196.6 GeV is found to be 0.29±0.05±0.03 pb, where the first uncertainty is statistical and the second systematic, in agreement with the Standard Model prediction of 0.22 pb. Finally, the mass spectra of the qq̄ℓ+ℓ- final states are analysed to search for the possible production of a new neutral heavy particle, for which no evidence is found.

Original languageEnglish
Pages (from-to)159-173
Number of pages15
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume616
Issue number3-4
DOIs
StatePublished - Jun 16 2005

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