Skip to main navigation Skip to search Skip to main content

A search for leptoquarks at HERA

  • S. Aid
  • , V. Andreev
  • , B. Andrieu
  • , R. D. Appuhn
  • , M. Arpagaus
  • , A. Babaev
  • , J. Bähr
  • , J. Bán
  • , Y. Ban
  • , R. Baranov
  • , E. Barrelet
  • , R. Barschke
  • , W. Bartel
  • , M. Barth
  • , U. Bassler
  • , H. P. Beck
  • , H. J. Behrend
  • , A. Belousov
  • , C. Berger
  • , G. Bernardi
  • R. Bernet, G. Bertrand-Coremans, M. Besançon, R. Beyer, P. Biddulph, P. Bispham, J. C. Bizot, V. Blobel, K. Borras, F. Botterweck, V. Boudry, A. Braemer, W. Braunschweig, V. Brisson, D. Bruncko, C. Brune, R. Buchholz, L. Büngener, J. Bürger, F. W. Büsser, A. Buniatian, S. Burke, M. J. Burton, G. Buschhorn, A. J. Campbell, T. Carli, F. Charles, M. Charlet, D. Clarke, A. B. Clegg, B. Clerbaux, S. Cocks, J. G. Contreras, C. Cormack, J. A. Coughlan, A. Courau, M. C. Cousinou, C. Coutures, G. Cozzika, L. Criegee, D. G. Cussans, J. Cvach, S. Dagoret, J. B. Dainton, W. D. Dau, K. Daum, M. David, C. L. Davis, B. Delcourt, L. Del Buono, A. de Roeck, E. A. de Wolf, M. Dirkmann, P. Dixon, P. di Nezza, W. Dlugosz, C. Dollfus, J. D. Dowell, H. B. Dreis, A. Droutskoi, J. Duboc, D. Düllmann, O. Dünger, H. Duhrn, J. Ebert, T. R. Ebert, G. Eckerlin, V. Efremenko, S. Egli, R. Eichler, F. Eisele, E. Eisenhandler, R. J. Ellison, E. Elsen, M. Erdmann, W. Erdmann, E. Evrard, A. B. Fahr, L. Favart, A. Fedotov, D. Feeken, R. Feist, J. Feltesse, J. Ferencei, F. Ferrarotto, K. Flamm, M. Fleischer, M. Flieser, G. Flügge, A. Fomenko, B. Fominykh, M. Forbush, J. Formánek, J. M. Foster, G. Franke, E. Fretwurst, E. Gabathuler, K. Gabathuler, F. Gaede, J. Garvey, J. Gayler, M. Gebauer, A. Gellrich, H. Genzel, R. Gerhards, A. Glazov, U. Goerlach, L. Goerlich, N. Gogitidze, M. Goldberg, D. Goldner, K. Golec-Biernat, B. Gonzalez-Pineiro, I. Gorelov, C. Grab, H. Grassier, R. Grassier, T. Greenshaw, R. Griffiths, G. Grindhammer, A. Gruber, C. Gruber, J. Haack, D. Haidt, L. Hajduk, O. Hamon, M. Hampel, M. Hapke, W. J. Haynes, G. Heinzelmann, R. C.W. Henderson, H. Henschel, I. Herynek, M. F. Hess, W. Hildesheim, K. H. Hilled, C. D. Hilton, J. Hladký, K. C. Hoeger, M. Höppner, D. Hoffmann, T. Holtom, R. Horisberger, V. L. Hudgson, M. Hütte, H. Hufnagel, M. Ibbotson, H. Itterbeck, M. A. Jabiol, A. JachoIkowska, C. Jacobsson, M. Jaffre, J. Janoth, T. Jansen, L. Jönsson, K. Johannsen, D. P. Johnson, L. Johnson, H. Jung, P. I.P. Kalmus, M. Kander, D. Kant, R. Kaschowitz, U. Kathage, J. Katzy, H. H. Kaufmann, S. Kazarian, I. R. Kenyon, S. Kermiche, C. Keuker, C. Kiesling, M. Klein, C. Klein wort, G. Knies, W. Ko, T. Köhler, J. H. Köhne, H. Kolanoski, F. Kole, S. D. Kolya, V. Korbel, M. Korn, P. Kostka, S. K. Kotelnikov, T. Krämerkämper, M. W. Krasny, H. Krehbiel, D. Krücker, U. Krüger, U. Krüner-Marquis, H. Küster, M. Kuhlen, T. Kurča, J. Kurzhöfer, D. Lacour, B. Laforge, F. Lamarche, R. Lander, M. P.J. Landon, W. Lange, U. Langenegger, P. Lanius, J. F. Laporte, A. Lebedev, F. Lehner, C. Leverenz, S. Levonian, C. Ley, G. Lindström, M. Lindstroem, J. Link, F. Linsel, J. Lipinski, B. List, G. Lobo, P. Loch, H. Lohmander, J. W. Lomas, G. C. Lopez, V. Lubimov, D. Lüke, N. Magnussen, E. Malinovski, S. Mani, R. Maraček, P. Marage, J. Marks, R. Marshall, J. Martens, G. Martin, R. Martin, H. U. Martyn, J. Martyniak, S. Masson, T. Mavroidis, S. J. Maxfield, S. J. McMahon, A. Mehta, K. Meier, T. Merz, A. Meyer, A. Meyer, H. Meyer, J. Meyer, P. O. Meyer, A. Migliori, S. Mikocki, D. Milstead, J. Moeck, F. Moreau, J. V. Morris, E. Mroczko, D. Miiller, G. Müller, K. Müller, P. Murin, V. Nagovizin, R. Nahnhauer, B. Naroska, T. Naumann, PR Newman, D. Newton, D. Neyret, H. K. Nguyen, T. C. Nicholls, F. Niebergall, C. Niebuhr, C. Niedzballa, H. Niggli, R. Nisius, G. Nowak, G. W. Noyes, M. Nyberg-Werther, M. Oakden, H. Oberlack, U. Obrock, J. E. Olsson, D. Ozerov, P. Palmen, E. Panaro, A. Panitch, C. Pascaud, G. D. Patel, H. Pawletta, E. Peppel, E. Perez, J. P. Phillips, A. Pieuchot, D. Pitzl, G. Pope, S. Prell, R. Prosi, K. Rabbertz, G. Rädel, F. Raupach, P. Reimer, S. Reinshagen, H. Rick, V. Riech, J. Riedlberger, F. Riepenhausen, S. Riess, M. Rietz, E. Rizvi, S. M. Robertson, P. Robmann, H. E. Roloff, R. Roosen, K. Rosenbauer, A. Rostovtsev, F. Rouse, C. Royon, K. Rüter, S. Rusakov, K. Rybicki, N. Sahlmann, D. P.C. Sankey, P. Schacht, S. Schiek, S. Schleif, P. Schleper, W. von Schlippe, D. Schmidt, G. Schmidt, A. Schöning, V. Schroder, E. Schuhmann, B. Schwab, F. Sefkow, M. Seidel, R. Sell, A. Semenov, V. Shekelyan, I. Sheviakov, L. N. Shtarkov, G. Siegmon, U. Siewert, Y. Sirois, I. O. Skillicorn, P. Smirnov, J. R. Smith, V. Solochenko, Y. Soloviev, A. Specka, J. Spiekermann, S. Spielman, H. Spitzer, F. Squinabol, R. Starosta, M. Steenbock, P. Steffen, R. Steinberg, H. Sterner, B. Stella, J. Stier, J. Stiewe, U. Stößlein, K. Stolze, U. Straumann, W. Struczinski, J. P. Sutton, S. Tapprogge, M. Taševský, V. Tchernyshov, S. Tchetchelnitski, J. Theissen, C. Thiebaux, G. Thompson, P. Truöl, J. Turnau, J. Tutas, P. Uelkes, A. Usik, S. Valkár, A. Valkárová, C. Vallée, D. Vandenplas, P. van Esch, P. van Mechelen, Y. Vazdik, P. Verrecchia, G. Villet, K. Wacker, A. Wagener, M. Wagener, A. Walther, B. Waugh, G. Weber, M. Weber, D. Wegener, A. Wegner, H. P. Wellisch, L. R. West, T. Wilksen, S. Willard, M. Winde, G. G. Winter, C. Wittek, E. Wünsch, T. P. Yiou, J. Žáček, D. Zarbock, Z. Zhang, A. Zhokin, M. Zimmer, F. Zomer, J. Zsembery, K. Zuber, M. zurNedden
  • Universität Hamburg
  • P.N. Lebedev Physical Institute of the Russian Academy of Sciences
  • c/o DESY
  • Institut ßr Teilchenphysik
  • ETH Zurich
  • Institute for Theoretical and Experimental Physics
  • DESY
  • Institute of Experimental Physics Slovak Academy of Sciences
  • Laboratoire de l'Accélérateur Linéaire
  • Universités Paris VI and VII
  • Inter-University Institute for High Energies ULB-VUB
  • Physik-Institut der Universität Zürich
  • Institut Pierre Simon Laplace, CNRS and CEA
  • Physics Department
  • University of Manchester
  • Institut für Physik
  • University of Dortmund
  • University of Heidelberg
  • RWTH Aachen University
  • Institut ftir Hochenergiephysik
  • Yerevan Physics Institute
  • School of Physics and Chemistry
  • Lancaster University
  • Max-Planck-Institut für Physik
  • CCLRC Rutherford Appleton Laboratory
  • Department of Physics
  • University of Liverpool
  • Aix-Marseille Université
  • Institute of Physics of the Czech Academy of Sciences
  • Institut für Reine und Angewandte Kernphysik
  • Christian-Albrechts-University Kiel
  • Bergische Universität Gesamthochschule Wuppertal
  • Dipartimento di Fisica
  • Physics Department and IIRPA
  • University of California, Davis
  • Nuclear Center
  • Charles University
  • School of Physics and Space Research
  • University of Birmingham
  • Queen Mary University of London
  • Paul Scherrer Institut
  • Institute for Nuclear Physics
  • Department of Physics
  • Lund University
  • Institut für Physik
  • Humboldt-Universität zu Berlin
  • Department of Physics and Astronomy
  • University of Glasgow

Research output: Contribution to journal › Article › peer-review

49 Citations (Scopus)

Abstract

A search for leptoquarks at HERA was performed in H1 using 1994 e+p data corresponding to an integrated luminosity of about 3 pb-1. Single lepioquarks were searched for in direct positron-quark fusion processes taking into account possible decays into lepton-quark pairs of either the first, the second, or the third generation. No significant deviation from the Standard Model predictions is found in the various final states studied and mass dependent exclusion limits are derived on the Yukawa couplings of the leptoquarks. Compared with earlier results from an analysis of e-p data, exclusion limits are considerably improved for leptoquarks which could be produced via e+-valence quark fusion. For leptoquarks with lepton flavour conserving couplings, masses up to 275 GeV (depending on the leptoquark type) are excluded for coupling values larger than √4παcm. For leptoquarks with lepton flavour violating couplings, masses up to 225 GeV are excluded for couplings with leptons of the second or third generation larger than √4παem. Fourteen possible combinations of couplings are studied and stringent exclusion limits comparable or better than any existing direct or indirect limits are obtained for each leptoquark type.

Original languageEnglish
Pages (from-to)173-185
Number of pages13
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume369
Issue number2
DOIs
Publication statusPublished - 22 Feb 1996

Fingerprint

Dive into the research topics of 'A search for leptoquarks at HERA'. Together they form a unique fingerprint.

Cite this