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1. The H1 detector at HERA

Author: I. Abt, T. Ahmed, S. Aid, V. Andreev, B. Andrieu, R.D. Appuhn, C. Arnault, M. Arpagaus, A. Babaev, H. Bärwolff, J. Bán, E. Banas, P. Baranov, E. Barrelet, W. Bartel, M. Barth, U. Bassler, F. Basti, D.E. Baynham, J.-M. Baze, G.A. Beck, H.P. Beck, D. Bederede, H.-J. Behrend, C. Beigbeder, A. Belousov, Ch. Berger, H. Bergstein, R. Bernard, G. Bernardi, R. Bernet, R. Bernier, U. Berthon, G. Bertrand-Coremans, M. Besançon, R. Beyer, J.-C. Biasci, P. Biddulph, V. Bidoli, E. Binder, P. Binko, J.-C. Bizot, V. Blobel, F. Blouzon, H. Blume, K. Borras, V. Boudry, C. Bourdarios, F. Brasse, W. Braunschweig, D. Breton, H. Brettel, V. Brisson, D. Bruncko, C. Brune, U. Buchner, L. Büngener, J. Bürger, F.W. Büsser, A. Buniatian, S. Burke, P. Burmeister, A. Busata, G. Buschhorn, A.J. Campbell, T. Carli, F. Charles, M. Charlet, R. Chase, D. Clarke, A.B. Clegg, M. Colombo, V. Commichau, J.F. Connolly, U. Cornett, J.A. Coughlan, A. Courau, M.-C. Cousinou, Ch. Coutures, A. Coville, G. Cozzika, D.A. Cragg, L. Criegee, H.I. Cronström, N.H. Cunliffe, J. Cvach, A. Cyz, S. Dagoret, J.B. Dainton, M. Danilov, A.W.E. Dann, D. Darvill, W.D. Dau, J. David, M. David, R.J. Day, E. Deffur, B. Delcourt, L. Del Buono, F. Descamps, M. Devel, J.P. Dewulf, A. De Roeck, P. Dingus, K. Djidi, C. Dollfus, J.D. Dowell, H.B. Dreis, A. Drescher, U. Dretzler, J. Duboc, A. Ducorps, D. Düllmann, O. Dünger, H. Duhm, B. Dulny, F. Dupont, R. Ebbinghaus, M. Eberle, J. Ebert, T.R. Ebert, G. Eckerlin, B.W.H. Edwards, V. Efremenko, S. Egli, S. Eichenberger, R. Eichler, F. Eisele, E. Eisenhandler, N.N. Ellis, R.J. Ellison, E. Elsen, A. Epifantsev, M. Erdmann, W. Erdmann, G. Ernst, E. Evrard, G. Falley, L. Favart, A. Fedotov, D. Feeken, R. Felst, J. Feltesse, Z.Y. Feng, I.F. Fensome, J. Fent, J. Ferencei, F. Ferrarotto, K. Finke, K. Flamm, W. Flauger, M. Fleischer, M. Flieser, P.S. Flower, G. Flügge, A. Fomenko, B. Fominykh, M. Forbush, J. Formánek, J.M. Foster, G. Franke, E. Fretwurst, W. Fröchtenicht, P. Fuhrmann, E. Gabathuler, K. Gabathuler, K. Gadow, K. Gamerdinger, J. Garvey, J. Gayler, E. Gažo, A. Gellrich, M. Gennis, U. Gensch, H. Genzel, R. Gerhards, K. Geske, I. Giesgen, D. Gillespie, W. Glasgow, L. Godfrey, J. Godlewski, U. Goerlach, L. Goerlich, N. Gogitidze, M. Goldberg, A.M. Goodall, I. Gorelov, P. Goritchev, L. Gosset, C. Grab, H. Grässler, R. Grässler, T. Greenshaw, C. Gregory, H. Greif, M. Grewe, G. Grindhammer, A. Gruber, C. Gruber, S. Günther, J. Haack, M. Haguenauer, D. Haidt, L. Hajduk, D. Hammer, O. Hamon, M. Hampel, D. Handschuh, K. Hangarter, E.M. Hanlon, M. Hapke, U. Harder, J. Harjes, P. Hartz, P.E. Hatton, R. Haydar, W.J. Haynes, J. Heatherington, V. Hedberg, C.R. Hedgecock, G. Heinzelmann, R.C.W. Henderson, H. Henschel, R. Herma, I. Herynek, W. Hildesheim, P. Hill, D.L. Hill, C.D. Hilton, J. Hladký, K.C. Hoeger, R.B. Hopes, R. Horisberger, A. Hrisoho, J. Huber, Ph. Huet, H. Hufnagel, N. Huot, J.-F. Huppert, M. Ibbotson, D. Imbault, H. Itterbeck, M.-A. Jabiol, A. Jacholkowska, C. Jacobsson, M. Jaffré, T. Jansen, P. Jean, J. Jeanjean, L. Jönsson, K. Johannsen, D.P. Johnson, L. Johnson, P. Jovanovic, H. Jung, P.I.P. Kalmus, D. Kant, G. Kantel, S. Karstensen, S. Kasarian, R. Kaschowitz, P. Kasselmann, U. Kathage, H.H. Kaufmann, G. Kemmerling, I.R. Kenyon, S. Kermiche, C. Keuker, C. Kiesling, M. Klein, C. Kleinwort, G. Knies, W. Ko, T. Kobler, J. Koch, T. Köhler, J. Köhne, M. Kolander, H. Kolanoski, F. Kole, J. Koll, S.D. Kolya, B. Koppitz, V. Korbel, M. Korn, P. Kostka, S.K. Kotelnikov, M.W. Krasny, H. Krehbiel, F. Krivan, D. Krücker, U. Krüger, U. Krüner-Marquis, M. Kubantsev, J.P. Kubenka, T. Külper, H.-J. Küsel, H. Küster, M. Kuhlen, T. Kurča, J. Kurzhöfer, B. Kuznik, B. Laforge, F. Lamarche, R. Lander, M.P.J. Landon, W. Lange, R. Langkau, P. Lanius, J.-F. Laporte, L. Laptin, H. Laskus, A. Lebedev, M. Lemler, U. Lenhardt, A. Leuschner, C. Leverenz, S. Levonian, D. Lewin, Ch. Ley, A. Lindner, G. Lindström, F. Linsel, J. Lipinski, B. Liss, P. Loch, A.B. Lodge, H. Lohmander, G.C. Lopez, J.-P. Lottin, V. Lubimov, K. Ludwig, D. Lüers, N. Lugetski, B. Lundberg, K. Maeshima, N. Magnussen, E. Malinovski, S. Mani, P. Marage, J. Marks, R. Marshall, J. Martens, F. Martin, G. Martin, R. Martin, H.-U. Martyn, J. Martyniak, V. Masbender, S. Masson, A. Mavroidis, S.J. Maxfield, S.J. McMahon, A. Mehta, K. Meier, J. Meissner, D. Mercer, T. Merz, C.A. Meyer, H. Meyer, J. Meyer, S. Mikocki, J.L. Mills, V. Milone, J. Möck, E. Monnier, B. Montés, F. Moreau, J. Moreels, B. Morgan, J.V. Morris, J.M. Morton, K. Müller, P. Murín, S.A. Murray, V. Nagovizin, B. Naroska, Th. Naumann, P. Nayman, A. Nepeipivo, P. Newman, D. Newman-Coburn, D. Newton, D. Neyret, H.K. Nguyen, F. Niebergall, C. Niebuhr, R. Nisius, T. Novák, H. Nováková, G. Nowak, G.W. Noyes, M. Nyberg, H. Oberlack, U. Obrock, J.E. Olsson, J. Olszowska, S. Orenstein, F. Ould-Saada, P. Pailler, S. Palanque, E. Panaro, A. Panitch, J.-Y. Parey, C. Pascaud, G.D. Patel, A. Patoux, C. Paulot, U. Pein, E. Peppel, E. Perez, P. Perrodo, A. Perus, S. Peters, J.-P. Pharabod, H.T. Phillips, J.P. Phillips, Ch. Pichler, A. Pieuchot, W. Pimpl, D. Pitzl, A. Porrovecchio, S. Prell, R. Prosi, H. Quehl, G. Rädel, F. Raupach, K. Rauschnabel, A. Reboux, P. Reimer, G. Reinmuth, S. Reinshagen, P. Ribarics, V. Riech, J. Riedlberger, H. Riege, S. Riess, M. Rietz, S.M. Robertson, P. Robmann, P. Röpnack, R. Roosen, K. Rosenbauer, A. Rostovtsev, C. Royon, A. Rudge, K. Rüter, M. Rudowicz, M. Ruffer, S. Rusakov, V. Rusinov, K. Rybicki, J. Sacton, N. Sahlmann, E. Sanchez, D.P.C. Sankey, M. Savitski, P. Schacht, S. Schiek, N. Schirm, S. Schleif, P. Schleper, W. von Schlippe, C. Schmidt, D. Schmidt, G. Schmidt, W. Schmitz, H. Schmücker, V. Schröder, J. Schütt, E. Schuhmann, M. Schulz, A. Schwind, W. Scobel, U. Seehausen, F. Sefkow, R. Sell, M. Seman, A. Semenov, P. Shatalov, V. Shekelyan, I. Sheviakov, H. Shooshtari, L.N. Shtarkov, G. Siegmon, U. Siewert, Y. Sirois, A. Sirous, I.O. Skillicorn, P. Škvařil, P. Smirnov, J.R. Smith, L. Smolik, D. Sole, Y. Soloviev, J. Špalek, H. Spitzer, R. von Staa, J. Staeck, P. Staroba, J. Šťastný, M. Steenbock, P. Štefan, P. Steffen, R. Steinberg, H. Steiner, B. Stella, K. Stephens, J. Stier, J. Stiewe, U. Stösslein, J. Strachota, U. Straumann, A. Strowbridge, W. Struczinski, J.P. Sutton, Z. Szkutnik, G. Tappern, S. Tapprogge, R.E. Taylor, V. Tchernyshov, V. Tchudakov, C. Thiebaux, K. Thiele, G. Thompson, R.J. Thompson, I. Tichomirov, C. Trenkel, W. Tribanek, K. Tröger, P. Truöl, M. Turiot, J. Turnau, J. Tutas, L. Urban, M. Urban, A. Usik, Š. Valkár, A. Valkárová, C. Vallée, G. Van Beek, M. Vanderkelen, L. Van Lancker, P. Van Mechelen, A. Vartapetian, Y. Vazdik, M. Vecko, P. Verrecchia, R. Vick, G. Villet, E. Vogel, K. Wacker, M. Wagener, I.W. Walker, A. Walther, G. Weber, D. Wegener, A. Wegner, P. Weissbach, H.P. Wellisch, L. West, D. White, S. Willard, M. Winde, G.-G. Winter, Th. Wolff, L.A. Womersley, A.E. Wright, E. Wünsch, N. Wulff, B.E. Wyborn, T.P. Yiou, J. Žáček, D. Zarbock, P. Závada, C. Zeitnitz, Z. Zhang, H. Ziaeepour, M. Zimmer, W. Zimmermann, F. Zomer, K. Zuber, Laboratoire de Physique Nucléaire et de Hautes Énergies ( LPNHE ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Université Paris Diderot - Paris 7 ( UPD7 ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire de l'Accélérateur Linéaire ( LAL ), Université Paris-Sud - Paris 11 ( UP11 ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), Centre de Physique des Particules de Marseille ( CPPM ), Centre National de la Recherche Scientifique ( CNRS ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Aix Marseille Université ( AMU ), H1, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Luminosity (scattering theory), Calorimeter (particle physics), Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Detector, HERA, 01 natural sciences, law.invention, Nuclear physics, Upgrade, Data acquisition, law, [ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex], 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, Collider, Instrumentation, Storage ring
Abstract: General aspects of the H1 detector at the electron-proton storage ring HERA as well as technical descriptions of the magnet, luminosity system, trigger, slow-control, data acquisition and off-line data handling are given. The three major components of the detector, the tracking, calorimeter and muon detectors, will be described in a forthcoming article. The present paper describes the detector that was used from 1992 to the end of 1994. After this a major upgrade of some components was undertaken. Some performance figures from luminosity runs at HERA during 1993 and 1994 are given.
Published: 1997

2. Search for Excited Fermions with the H1 Detector

Author: C. Adloff, S. Aid, M. Anderson, V. Andreev, B. Andrieu, C. Arndt, A. Babaev, J. Bähr, J. Bán, Y. Ban, P. Baranov, E. Barrelet, R. Barschke, W. Bartel, M. Barth, U. Bassler, M. Beck, H.P. Beck, H.-J. Behrend, A. Belousov, Ch. Berger, G. Bernardi, 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, W. Brückner, P. Bruel, D. Bruncko, C. Brune, R. Buchholz, L. Büngener, J. Bürger, F.W. Büsser, A. Buniatian, S. Burke, M.J. Burton, D. Calvet, A.J. Campbell, T. Carli, M. Charlet, D. Clarke, A.B. Clegg, B. Clerbaux, S. Cocks, J.G. Contreras, C. Cormack, J.A. Coughlan, A. Courau, M.-C. Cousinou, 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, A. De Roeck, E.A. De Wolf, M. Dirkmann, P. Dixon, P. Di Nezza, W. Dlugosz, C. Dollfus, K.T. Donovan, J.D. Dowell, H.B. Dreis, A. Droutskoi, O. Dünger, H. Duhm, J. Ebert, T.R. Ebert, G. Eckerlin, V. Efremenko, S. Egli, R. Eichler, F. Eisele, E. Eisenhandler, E. Elsen, M. Erdmann, W. Erdmann, A.B. Fahr, L. Favart, A. Fedotov, R. Felst, J. Feltesse, J. Ferencei, F. Ferrarotto, K. Flamm, M. Fleischer, M. Flieser, G. Flügge, A. Fomenko, J. Formánek, J.M. Foster, G. Franke, E. Fretwurst, E. Gabathuler, K. Gabathuler, F. Gaede, J. Garvey, J. Gayler, M. Gebauer, H. Genzel, R. Gerhards, A. Glazov, L. Goerlich, N. Gogitidze, M. Goldberg, D. Goldner, K. Golec-Biernat, B. Gonzalez-Pineiro, I. Gorelov, C. Grab, H. Grässler, T. Greenshaw, R.K. Griffiths, G. Grindhammer, A. Gruber, C. Gruber, T. Hadig, D. Haidt, L. Hajduk, T. Haller, M. Hampel, W.J. Haynes, B. Heinemann, G. Heinzelmann, R.C.W. Henderson, H. Henschel, I. Herynek, M.F. Hess, K. Hewitt, W. Hildesheim, K.H. Hiller, C.D. Hilton, J. Hladký, M. Höppner, D. Hoffmann, T. Holtom, R. Horisberger, V.L. Hudgson, M. Hütte, M. Ibbotson, H. Itterbeck, A. Jacholkowska, C. Jacobsson, M. Jaffre, J. Janoth, D.M. Jansen, T. Jansen, L. Jönsson, D.P. Johnson, H. Jung, P.I.P. Kalmus, M. Kander, D. Kant, R. Kaschowitz, U. Kathage, J. Katzy, H.H. Kaufmann, O. Kaufmann, M. Kausch, S. Kazarian, I.R. Kenyon, S. Kermiche, C. Keuker, C. Kiesling, M. Klein, C. Kleinwort, G. Knies, T. Köhler, J.H. Köhne, H. Kolanoski, S.D. Kolya, V. Korbel, P. Kostka, S.K. Kotelnikov, T. Krämerkämper, M.W. Krasny, H. Krehbiel, D. Krücker, H. Küster, M. Kuhlen, T. Kurča, J. Kurzhöfer, D. Lacour, B. Laforge, M.P.J. Landon, W. Lange, U. Langenegger, A. Lebedev, F. Lehner, S. Levonian, G. Lindström, M. Lindstroem, F. Linsel, J. Lipinski, B. List, G. Lobo, P. Loch, J.W. Lomas, G.C. Lopez, V. Lubimov, D. Lüke, L. Lytkin, N. Magnussen, E. Malinovski, R. Maraček, P. Marage, J. Marks, R. Marshall, J. Martens, G. Martin, R. Martin, H.-U. Martyn, J. Martyniak, T. Mavroidis, S.J. Maxfield, S.J. McMahon, A. Mehta, K. Meier, F. Metlica, 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. Müller, G. Müller, K. Müller, P. Murín, V. Nagovizin, R. Nahnhauer, B. Naroska, Th. Naumann, I. Négri, P.R. Newman, D. Newton, H.K. Nguyen, T.C. Nicholls, F. Niebergall, C. Niebuhr, Ch. Niedzballa, H. Niggli, G. Nowak, G.W. Noyes, T. Nunnemann, M. Nyberg-Werther, M. Oakden, H. Oberlack, 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, B. Povh, S. Prell, K. Rabbertz, G. Rädel, P. Reimer, S. Reinshagen, H. Rick, F. Riepenhausen, S. Riess, E. Rizvi, P. Robmann, H.E. Roloff, R. Roosen, K. Rosenbauer, A. Rostovtsev, F. Rouse, C. Royon, K. Rüter, S. Rusakov, K. Rybicki, D.P.C. Sankey, P. Schacht, S. Schiek, S. Schleif, P. Schleper, W. von Schlippe, D. Schmidt, G. Schmidt, L. Schoeffel, A. Schöning, V. Schröder, E. Schuhmann, B. Schwab, F. Sefkow, R. Sell, A. Semenov, V. Shekelyan, I. Sheviakov, L.N. Shtarkov, G. Siegmon, U. Siewert, Y. Sirois, I.O. Skillicorn, P. Smirnov, V. Solochenko, Y. Soloviev, A. Specka, J. Spiekermann, S. Spielman, H. Spitzer, F. Squinabol, P. Steffen, R. Steinberg, H. Steiner, J. Steinhart, B. Stella, A. Stellberger, 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, N. Tobien, R. Todenhagen, P. Truöl, G. Tsipolitis, J. Turnau, J. Tutas, E. Tzamariudaki, 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, B. Waugh, G. Weber, M. Weber, D. Wegener, A. Wegner, T. Wengler, M. Werner, L.R. West, T. Wilksen, S. Willard, M. Winde, G.-G. Winter, C. Wittek, M. Wobisch, E. Wünsch, J. Žáček, D. Zarbock, Z. Zhang, A. Zhokin, P. Zini, F. Zomer, J. Zsembery, K. Zuber, M. zurNedden, Levy, Jean-Michel, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: Quark, Nuclear and High Energy Physics, Particle physics, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics::Instrumentation and Detectors, FOS: Physical sciences, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, law.invention, High Energy Physics - Experiment (hep-ex), law, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, Collider, Physics, Gauge boson, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Electroweak interaction, HERA, Fermion, Excited state, High Energy Physics::Experiment, Neutrino
Abstract: We present a search for excited electrons, neutrinos and quarks using the H1 detector at the $ep$ collider HERA, based on data taken in 1994 with an integrated luminosity of 2.75 pb$^{-1}$. Radiative decays of excited quarks and neutrinos have been investigated as well as decays of excited electrons into all possible electroweak gauge bosons. No evidence for new particle production is found and exclusion limits are derived., Comment: 20 pages, latex, 6 Figures
Published: 1997

3. Low Q$^{2}$ Jet Production at HERA and Virtual Photon Structure

Author: C. Adloff, S. Aid, M. Anderson, V. Andreev, B. Andrieu, V. Arkadov, C. Arndt, I. Ayyaz, A. Babaev, J. Bähr, J. Bán, P. Baranov, E. Barrelet, R. Barschke, W. Bartel, U. Bassler, M. Beck, H.-J. Behrend, C. Beier, A. Belousov, Ch. Berger, G. Bernardi, G. Bertrand-Coremans, R. Beyer, P. Biddulph, J.C. Bizot, K. Borras, F. Botterweck, V. Boudry, S. Bourov, A. Braemer, W. Braunschweig, V. Brisson, D.P. Brown, W. Brückner, P. Bruel, D. Bruncko, C. Brune, J. Bürger, F.W. Büsser, A. Buniatian, S. Burke, G. Buschhorn, D. Calvet, A.J. Campbell, T. Carli, M. Charlet, D. Clarke, B. Clerbaux, S. Cocks, J.G. Contreras, C. Cormack, J.A. Coughlan, M.-C. Cousinou, B.E. Cox, G. Cozzika, D.G. Cussans, J. Cvach, S. Dagoret, J.B. Dainton, W.D. Dau, K. Daum, M. David, A. De Roeck, E.A. De Wolf, B. Delcourt, M. Dirkmann, P. Dixon, W. Dlugosz, K.T. Donovan, J.D. Dowell, A. Droutskoi, J. Ebert, T.R. Ebert, G. Eckerlin, V. Efremenko, S. Egli, R. Eichler, F. Eisele, E. Eisenhandler, E. Elsen, M. Erdmann, A.B. Fahr, L. Favart, A. Fedotov, R. Felst, J. Feltesse, J. Ferencei, F. Ferrarotto, K. Flamm, M. Fleischer, M. Flieser, G. Flügge, A. Fomenko, J. Formánek, J.M. Foster, G. Franke, E. Gabathuler, K. Gabathuler, F. Gaede, J. Garvey, J. Gayler, M. Gebauer, R. Gerhards, A. Glazov, L. Goerlich, N. Gogitidze, M. Goldberg, B. Gonzalez-Pineiro, I. Gorelov, C. Grab, H. Grässler, T. Greenshaw, R.K. Griffiths, G. Grindhammer, A. Gruber, C. Gruber, T. Hadig, D. Haidt, L. Hajduk, T. Haller, M. Hampel, W.J. Haynes, B. Heinemann, G. Heinzelmann, R.C.W. Henderson, S. Hengstmann, H. Henschel, I. Herynek, M.F. Hess, K. Hewitt, K.H. Hiller, C.D. Hilton, J. Hladký, M. Höppner, D. Hoffmann, T. Holtom, R. Horisberger, V.L. Hudgson, M. Hütte, M. Ibbotson, Ç. İşsever, H. Itterbeck, M. Jacquet, M. Jaffre, J. Janoth, D.M. Jansen, L. Jönsson, D.P. Johnson, H. Jung, P.I.P. Kalmus, M. Kander, D. Kant, U. Kathage, J. Katzy, H.H. Kaufmann, O. Kaufmann, M. Kausch, S. Kazarian, I.R. Kenyon, S. Kermiche, C. Keuker, C. Kiesling, M. Klein, C. Kleinwort, G. Knies, J.H. Köhne, H. Kolanoski, S.D. Kolya, V. Korbel, P. Kostka, S.K. Kotelnikov, T. Krämerkämper, M.W. Krasny, H. Krehbiel, D. Krücker, A. Küpper, H. Küster, M. Kuhlen, T. Kurča, B. Laforge, R. Lahmann, M.P.J. Landon, W. Lange, U. Langenegger, A. Lebedev, F. Lehner, V. Lemaitre, S. Levonian, M. Lindstroem, J. Lipinski, B. List, G. Lobo, G.C. Lopez, V. Lubimov, D. Lüke, L. Lytkin, N. Magnussen, H. Mahlke-Krüger, E. Malinovski, R. Maraček, P. Marage, J. Marks, R. Marshall, J. Martens, G. Martin, R. Martin, H.-U. Martyn, J. Martyniak, T. Mavroidis, S.J. Maxfield, S.J. McMahon, A. Mehta, K. Meier, P. Merkel, F. Metlica, 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. Müller, K. Müller, P. Murı́n, V. Nagovizin, R. Nahnhauer, B. Naroska, Th. Naumann, I. Négri, P.R. Newman, D. Newton, H.K. Nguyen, T.C. Nicholls, F. Niebergall, C. Niebuhr, Ch. Niedzballa, H. Niggli, G. Nowak, T. Nunnemann, H. Oberlack, J.E. Olsson, D. Ozerov, P. Palmen, E. Panaro, A. Panitch, C. Pascaud, S. Passaggio, G.D. Patel, H. Pawletta, E. Peppel, E. Perez, J.P. Phillips, A. Pieuchot, D. Pitzl, R. Pöschl, G. Pope, B. Povh, K. Rabbertz, P. Reimer, H. Rick, S. Riess, E. Rizvi, P. Robmann, R. Roosen, K. Rosenbauer, A. Rostovtsev, F. Rouse, C. Royon, K. Rüter, S. Rusakov, K. Rybicki, D.P.C. Sankey, P. Schacht, J. Scheins, S. Schiek, S. Schleif, P. Schleper, W. von Schlippe, D. Schmidt, G. Schmidt, L. Schoeffel, A. Schöning, V. Schröder, E. Schuhmann, H.-C. Schultz-Coulon, B. Schwab, F. Sefkow, A. Semenov, V. Shekelyan, I. Sheviakov, L.N. Shtarkov, G. Siegmon, U. Siewert, Y. Sirois, I.O. Skillicorn, T. Sloan, P. Smirnov, M. Smith, V. Solochenko, Y. Soloviev, A. Specka, J. Spiekermann, S. Spielman, H. Spitzer, F. Squinabol, P. Steffen, R. Steinberg, J. Steinhart, B. Stella, A. Stellberger, J. Stiewe, K. Stolze, U. Straumann, W. Struczinski, J.P. Sutton, M. Swart, S. Tapprogge, M. Taševský, V. Tchernyshov, S. Tchetchelnitski, J. Theissen, G. Thompson, P.D. Thompson, N. Tobien, R. Todenhagen, P. Truöl, J. Zálešák, G. Tsipolitis, J. Turnau, E. Tzamariudaki, P. Uelkes, A. Usik, S. Valkár, A. Valkárová, C. Vallée, P. Van Esch, P. Van Mechelen, D. Vandenplas, Y. Vazdik, P. Verrecchia, G. Villet, K. Wacker, A. Wagener, M. Wagener, R. Wallny, T. Walter, B. Waugh, G. Weber, M. Weber, D. Wegener, A. Wegner, T. Wengler, M. Werner, L.R. West, S. Wiesand, T. Wilksen, S. Willard, M. Winde, G.-G. Winter, C. Wittek, M. Wobisch, H. Wollatz, E. Wünsch, J. Žáček, D. Zarbock, Z. Zhang, A. Zhokin, P. Zini, F. Zomer, J. Zsembery, M. ZurNedden, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Levy, Jean-Michel, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and H1 Collaboration
Subjects: Physics, Quantum chromodynamics, Nuclear and High Energy Physics, Particle physics, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], 010308 nuclear & particles physics, Scattering, FOS: Physical sciences, Virtual particle, HERA, Jet (particle physics), 01 natural sciences, law.invention, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Transverse plane, law, Pseudorapidity, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, Collider, Nuclear Experiment
Abstract: The transition between photoproduction and deep-inelastic scattering is investigated in jet production at the HERA ep collider, using data collected by the H1 experiment. Measurements of the differential inclusive jet cross-sections dsigep/dEt* and dsigmep/deta*, where Et* and eta* are the transverse energy and the pseudorapidity of the jets in the virtual photon-proton centre of mass frame, are presented for 0 < Q2 < 49 GeV2 and 0.3 < y < 0.6. The interpretation of the results in terms of the structure of the virtual photon is discussed. The data are best described by QCD calculations which include a partonic structure of the virtual photon that evolves with Q2., 20 pages, 5 Figures
Published: 1997

4. The tracking calorimeter and muon detectors of the H1 experiment at Hera

Author: L. N. Shtarkov, A. Panitch, G. Tappern, R. Nisius, Armen Vartapetian, P. S. Flower, R. Bernet, D. White, K. C. Hoeger, B. Morgan, H. Bergstein, S. D. Kolya, Th. Naumann, U. Bassler, J. Žáček, A. B. Lodge, P. Jovanovic, F. Linsel, J. P Dewulf, H. Novakova, K. Gabathuler, A. Buniatian, D. Wegener, W.J. Haynes, J. R. Smith, R. Herma, S. Schiek, H. Duhm, V. Milone, E. Gažo, J. Mock, Tim Greenshaw, A. Sirous, N.H. Cunliffe, F. Blouzon, Vincent Hedberg, G. Knies, A. Wegner, Paul Richard Newman, Grzegorz Nowak, Emmanuel Monnier, C. Jacobsson, L. R. West, S. Kermiche, Michael Schulz, J. M. Foster, P. Štefan, J-P. Meyer, W. von Schlippe, Leif J. Jönsson, E. Deffur, M. Lemler, T. Köhler, M. W. Krasny, Vladimir Andreev, J. Heatherington, H. Ziaeepour, E. Panaro, J. Kurzhöfer, T. Merz, M. Ibbotson, J. Duboc, B. Stella, D. Hammer, S. Kasarian, Leith Godfrey, P. Ribarics, V. Nagovizin, A. W. E. Dann, L. Laptin, S. Mani, R. Felst, J. Haack, G. Martin, S. Levonian, K. Stephens, H. P. Beck, J.M. Morton, P. Kostka, H. Greif, R. Eichler, I. O. Skillicorn, J.P. Lottin, H. Lohmander, Derek L. G. Hill, V. Efremenko, S. Eichenberger, H. B. Dreis, J. P. Kubenka, U. Gensch, J. H. Köhne, J. Huber, R. Kaschowitz, R. Bernier, D. Newton, K. Zuber, A. Lebedev, Stephen Burke, M. Eberle, J. Staeck, E. Peppel, D. Handschuh, M. Wagener, W. Hildesheim, J. Ferencei, Roland Horisberger, M. Colombo, M. Rietz, S. Aid, K. Flamm, D. Imbault, M. David, Murrough Landon, R.L. Chase, A. E. Wright, H. Krehbiel, A. Valkárová, A. Mavroidis, G. Kemmerling, V. Tchudakov, G. W. Noyes, G. Siegmon, A. Pieuchot, S. Mikocki, M. Seman, K. Rüter, S. Riess, F. Zomer, A. M. Goodall, H. T. Blume, F. Charles, R. Beyer, L. Del Buono, I. Sheviakov, E. Malinovski, M. Kuhlen, U. Dretzler, K. Hangarter, U. Kathage, E. Eisenhandler, D. Haidt, D. Breton, J. Moreels, J. Cvach, K. Thiele, C. Niebuhr, C. Gregory, S. Egli, P. Lanius, K. Gadow, A. Reboux, P. I. P. Kalmus, B. Laforge, Mikhail Danilov, D. Lewin, H. Steiner, Th. Wolff, R. Roosen, D. Kant, F. Moreau, J. Hladký, J. D. Dowell, Zhen Zhang, Y. Soloviev, H. Itterbeck, S. Peters, P. Van Mechelen, M. Charlet, M. Rudowicz, G. Heinzelmann, P E. Hatton, I. Abt, F. Ould-Saada, G. Buschhorn, H. I. Cronström, Z.Y. Feng, U. Lenhardt, U. Harder, V. Tchernyshov, H.-J. Küsel, P. Hill, Steve McMahon, Kerstin Borras, U. Krüger, J.F. Huppert, M. Kolander, Carl R. Brune, M. Barth, E. Gabathuler, J. David, J. Bán, F. Descamps, M. Fleischer, T. R. Ebert, A. Semenov, H. Shooshtari, A. Jacholkowska, J. Martyniak, S. Dagoret, C. A. Meyer, R. J. Thompson, Yves Sirois, H. U. Martyn, A. Busata, A. Fedotov, Günter Flügge, U. Seehausen, T. P. Yiou, U. Krüner-Marquis, M. Vecko, J. C. Biasci, I. W. Walker, I. R. Kenyon, T. Novák, D. Mercer, F. Sefkow, H. Spitzer, A. Gruber, H. Küster, G. Kantel, N. Lugetski, G. Bertrand-Coremans, M. C. Cousinou, K. Johannsen, M. Urban, V I. Shekelyan, R. Haydar, B. Fominykh, A. Leuschner, Christoph Grab, Nicolas Ellis, A. Rudge, P. Fuhrmann, J. Lipinski, C. Zeitnitz, E. Wünsch, K. Wacker, R. Steinberg, A. Nepeipivo, Christophe Royon, M. Korn, K. Ludwig, B. Liss, G. Falley, S. Masson, E. Barrelet, Dave Sankey, P. Burmeister, P. Dingus, F. Krivan, A. Usik, Ch. Ley, J. Feltesse, L. Criegee, G. Franke, A. De Roeck, F. Brasse, L. Goerlich, D. Gillespie, Richard E. Taylor, Michel Devel, B. Naroska, T. Jansen, Emmanuelle Perez, Winston Ko, G. Weber, Björn Lundberg, P. Hartz, V. Masbender, M. Kubantsev, J.F. Connolly, Max Klein, R. J. Ellison, L. Urban, U. Straumann, F. Dupont, C. Pascaud, G. D. Patel, H. Meyer, R. von Staa, S. Rusakov, L. Van Lancker, Dusan Bruncko, P. Nayman, W. Pimpl, Ch. Berger, F. Ferrarotto, H. Henschel, A. Gellrich, U. Berthon, F. Lamarche, T. Kurča, G. Rädel, J. Schütt, A. Drescher, N. Magnussen, Guenter Eckerlin, R. Vick, D.P. Johnson, M. Jaffre, J. E. Olsson, P. Jean, L. Gosset, H. Genzel, W. Fröchtenicht, S. A. Murray, W. Bartel, B. Koppitz, M. Hampel, B. Kuznik, J. Formánek, N. Sahlmann, E. Schuhmann, H. Brettel, P. A. Smirnov, K. Meier, C. Beigbeder, Ph. Huet, K. Tröger, C. Trenkel, G. Reinmuth, Wolfgang Scobel, D. Darvill, P. Biddulph, P. Binko, R. Ebbinghaus, J. Koch, L. Büngener, Ch. Pichler, D. Bederede, J. Martens, H. Laskus, M. Flieser, Kaori Maeshima, F. Kole, Martin Erdmann, Eckhart Fretwurst, J. Stier, J. V. Morris, D. A. Cragg, D. Newman-Coburn, Hermann Kolanoski, Jan Godlewski, M. A. Jabiol, G. Villet, S. Schleif, U. Obrock, J. Marks, F. Niebergall, V. Korbel, Pierre Marage, G. Schmidt, Y. Vazdik, D. Clarke, G. A. Beck, J. Garvey, F. W. Büsser, R B. Hopes, John A Coughlan, A. Coville, R. C. W. Henderson, U. Cornett, C. Vallée, Elzbieta Banas, Rosario Martín, P. Goritchev, A. Epifantsev, H. Quehl, A. M. Fomenko, U. Pein, K. Gamerdinger, Horst Oberlack, Vladimir Rusinov, L. Smolik, H. K. Nguyen, I. Herynek, P. Perrodo, Pavel Shatalov, W. Tribanek, J. Tutas, R. D. Appuhn, W. Braunschweig, M. Forbush, I. V. Gorelov, K. Müller, A. Schwind, R. Sell, S. Tapprogge, W.D. Dau, M. Vanderkelen, D. Lüers, J. D. Burger, Petr Zavada, P. Weissbach, E. Elsen, R. Prosi, Pavel Murin, V. Brisson, H. Grässler, Pavel Staroba, C. Arnault, B. Dulny, A. Courau, J. B. Dainton, C. Paulot, J. Spalek, I. Tichomirov, L.A. Womersley, Claire Bourdarios, R. Grässler, Ch. Coutures, W. Struczinski, Stephen Maxfield, J L. Mills, P. Verrecchia, P. Škvařil, C R. Hedgecock, D. Neyret, N. Huot, U. Siewert, R. L. Lander, H. Bärwolff, J. Stiewe, S. Palanque, A. Rostovtsev, Claus Kleinwort, J. Fent, M. Gennis, B W H. Edwards, V. Schröder, G. Van Beek, A. B. Clegg, Andrew Mehta, J. Riedlberger, H. H. Kaufmann, N. Gogitidze, M. Zimmer, C. Gruber, A. Patoux, M. Nyberg, J. Harjes, S. M. Robertson, A. Walther, W. Flauger, Jean-Francois Laporte, Laurent Favart, Z. Szkutnik, J. Turnau, M. Ruffer, G. Ernst, S. Orenstein, W. Zimmermann, B E. Wyborn, M. Steenbock, I. Giesgen, C. Dollfus, R. Bernard, P. Pailler, J. Ebert, B. Andrieu, A. Strowbridge, H. Hufnagel, Daniel Pitzl, K. Geske, J. Koll, Frank Raupach, K. Finke, S. Günther, S. K. Kotelnikov, L. Hajduk, N. Wulff, A. Perus, Ulrich Goerlach, P. Kasselmann, E. Evrard, Peter Loch, J. Gayler, C.D. Hilton, U. Buchner, G. Lindström, M. Turiot, A. Porrovecchio, B. Delcourt, U. Stösslein, M. Grewe, B. Montes, C. Leverenz, R. Marshall, Dirk Krücker, O. Hamon, V. Bidoli, P. Baranov, D.E. Baynham, V. Commichau, G. Cozzika, Peter Schleper, P. Röpnack, F. Eisele, A. Lindner, J. Janoth, Marc Besancon, A.S. Belousov, J.P. Phillips, Stefan Valkar, P. Truöl, F. Basti, H T. Phillips, Volker Blobel, C. Keuker, Hannes Jung, D. Schmidt, K. Rosenbauer, M. Haguenauer, Peter Schacht, G. C. Lopez, Rudolf Langkau, W. Schmitz, M. Savitski, E. Vogel, Gregorio Bernardi, V. Boudry, Anton Babaev, C. Thiebaux, A. Ducorps, J. Strachota, Jean Sacton, G. Thompson, A. Cyz, H. Riege, D. Düllmann, H. J. Behrend, J.C. Bizot, M. Goldberg, Peter Robmann, J. Šťastný, V. Riech, O. Dünger, M. Hapke, R. Gerhards, P. E. Reimer, Alan Campbell, E. M. Hanlon, J. Jeanjean, G. G. Winter, G. Grindhammer, P. Steffen, Jolanta Olszowska, D. Zarbock, H. P. Wellisch, T. Carli, K. Rauschnabel, Wolfgang Lange, E. Binder, E. Sanchez, D. Sole, S. Prell, I F. Fensome, S. Reinshagen, C. Kiesling, T. Kobler, R J. Day, K. Djiki, T. Külper, S. Karstensen, N. Schirm, M. Arpagaus, K. Rybicki, C. Schmidt, J. P. Sutton, W. Glasgow, Wolfram Erdmann, T. Ahmed, J. Meissner, D. Feeken, J.Y. Parey, S. Willard, H. Schmücker, M. Winde, J. P. Pharabod, L. Johnson, J.M. Baze, F. Martin, V. Lubimov, A. Hrisoho, Kerec, Hélène, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Laboratoire de l'Accélérateur Linéaire ( LAL ), Université Paris-Sud - Paris 11 ( UP11 ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), Centre de Physique des Particules de Marseille ( CPPM ), Centre National de la Recherche Scientifique ( CNRS ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Aix Marseille Université ( AMU ), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Elementary Particle Physics, and Vrije Universiteit Brussel
Subjects: Physics, Nuclear and High Energy Physics, Luminosity (scattering theory), Calorimeter (particle physics), [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Detector, HERA, Tracking (particle physics), 7. Clean energy, 01 natural sciences, Nuclear physics, [ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex], 0103 physical sciences, Calibration, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, Instrumentation, Storage ring, Muon detector
Abstract: Technical aspects of the three major components of the H1 detector at the electron-proton storage ring HERA are described. This paper covers the detector status up to the end of 1994 when a major upgrading of some of its elements was undertaken. A description of the other elements of the detector and some performance figures from luminosity runs at HERA during 1993 and 1994 are given in a paper previously published in this journal.
Published: 1997

5. Measurement of Charged Particle Transverse Momentum Spectra in Deep Inelastic Scattering

Author: C. Adloff, S. Aid, M. Anderson, V. Andreev, B. Andrieu, A. Babaev, J. Bähr, J. Bán, Y. Ban, P. Baranov, E. Barrelet, R. Barschke, W. Bartel, M. Barth, U. Bassler, H.P. Beck, M. Beck, H.-J. Behrend, A. Belousov, Ch. Berger, G. Bernardi, 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, W. Brückner, P. Bruel, D. Bruncko, C. Brune, R. Buchholz, L. Büngener, J. Bürger, F.W. Büsser, A. Buniatian, S. Burke, M.J. Burton, D. Calvet, A.T. Campbell, T. Carli, M. Charlet, D. Clarke, A.B. Clegg, B. Clerbaux, S. Cocks, J.G. Contreras, C. Cormack, J.A. Coughlan, A. Courau, M.-C. Cousinou, 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, A. De Roeck, E.A. De Wolf, M. Dirkmann, P. Dixon, P. Di Nezza, W. Dlugosz, C. Dollfus, K.T. Donovan, J.D. Dowell, H.B. Dreis, A. Droutskoi, O. Dünger, H. Duhm, J. Ebert, T.R. Ebert, G. Eckerlin, V. Efremenko, S. Egli, R. Eichler, F. Eisele, E. Eisenhandler, E. Elsen, M. Erdmann, W. Erdmann, A.B. Fahr, L. Favart, A. Fedotov, R. Felst, J. Feltesse, J. Ferencei, F. Ferrarotto, K. Flamm, M. Fleischer, M. Flieser, G. Flügge, A. Fomenko, J. Formánek, J.M. Foster, G. Franke, E. Fretwurst, E. Gabathuler, K. Gabathuler, F. Gaede, J. Garvey, J. Gayler, M. Gebauer, H. Genzel, R. Gerhards, A. Glazov, L. Goerlich, N. Gogitidze, M. Goldberg, D. Goldner, K. Golec-Biernat, B. Gonzalez-Pineiro, I. Gorelov, C. Grab, H. Grässler, T. Greenshaw, R.K. Griffiths, G. Grindhammer, A. Gruber, C. Gruber, T. Hadig, D. Haidt, L. Hajduk, T. Haller, M. Hampel, W.J. Haynes, B. Heinemann, G. Heinzelmann, R.C.W. Henderson, H. Henschel, I. Herynek, M.F. Hess, K. Hewitt, W. Hildesheim, K.H. Hiller, C.D. Hilton, J. Hladký, M. Höppner, D. Hoffmann, T. Holtom, R. Horisberger, V.L. Hudgson, M. Hütte, M. Ibbotson, H. Itterbeck, A. Jacholkowska, C. Jacobsson, M. Jaffre, J. Janoth, D.M. Jansen, T. Jansen, L. Jönson, D.P. Johnson, H. Jung, P.I.P. Kalmus, M. Kander, D. Kant, R. Kaschowitz, U. Kathage, J. Katzy, H.H. Kaufmann, O. Kaufmann, M. Kausch, S. Kazarian, I.R. Kenyon, S. Kermiche, C. Keuker, C. Kiesling, M. Klein, C. Kleinwort, G. Knies, T. Köhler, J.H. Köhne, H. Kolanoski, S.D. Kolya, V. Korbel, P. Kostka, S.K. Kotelnikov, T. Krämerkämper, M.W. Krasny, H. Krehbiel, D. Krücker, H. Küster, M. Kuhlen, T. Kurča, J. Kurzhöfer, D. Lacour, B. Laforge, M.P.J. Landon, W. Lange, U. Langenegger, A. Lebedev, F. Lehner, S. Levonian, G. Lindström, M. Lindstroem, F. Linsel, J. Lipinski, B. List, G. Lobo, P Loch, J.W. Lomas, G.C. Lopez, V. Lubimov, D. Liike, L. Lytkin, N. Magnussen, E. Malinovski, R. Maraček, P. Marage, J. Marks, R. Marshall, J. Martens, G. Martin, R. Martin, H.-U. Martyn, J. Martyniak, T. Mavroidis, S.J. Maxfield, S.J. McMahon, A. Mehta, K. Meier, F. Metlica, 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. Müller, G. Müller, K. Müller, P. Murín, V. Nagovizin, R. Nahnhauer, B. Naroska, Th. Naumann, I. Négri, P.R. Newman, D. Newton, H.K. Nguyen, T.C. Nicholls, F. Niebergall, C. Niebuhr, Ch. Niedzballa, H. Niggli, G. Nowak, G.W. Noyes, T Nunnemann, M. Nyberg-Werther, M. Oakden, H. Oberlack, 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, B. Povh, S. Prell, K. Rabbertz, G. Rädel, P. Reimer, S. Reinshagen, H. Rick, F. Riepenhausen, S. Riess, E. Rizvi, P. Robmann, P.H.E. Roloff, R. Roosen, K. Rosenbauer, A. Rostovtsev, F. Rouse, C. Royon, K. Rüter, S. Rusakov, K. Rybicki, D.P.C. Sankey, P. Schacht, S. Schiek, S. Schleif, P. Schleper, W. von Schlippe, D. Schmidt, G. Schmidt, L. Schoeffel, A. Schöning, V. Schröder, E. Schuhmann, B. Schwab, F. Sefkow, R. Sell, A. Semenovy, V. Shekelyan, I. Sheviakov, L.N. Shtarkov, G. Siegmon, U. Siewert, Y. Sirois, I.O. Skillicorni, F Smirnov, V. Solochenko, Y. Soloviev, A. Specka, J. Spiekermann, S. Spielman, H. Spitzer, F. Squinabol, F Steffen, F. Steinberg, H. Steiner, J. Steinhart, B. Stella, A. Stellbergr, P.J. Stier, J. Stiewe, U. Stöβlein, K. Stolze, U. Straumann, W. Struczinski, J.P. Sutton, S. Tapprogge, M. Tagev̌ský, V. Tchernyshov, S. Tchetchelnitski, J. Theissen, C. Thiebaux, G. Thompson, N. Tobien, R. Todenhagen, P. Truöl, G. Tsipolitis, J. Turnau, J. Tutas, E. Tzamariudaki, 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, B. Waugh, G. Weber, M. Weber, D. Wegener, A. Wenger, T. Wengler, M. Werner, L.R. West, T. Wilksen, S. Willard, M. Winde, G.-G. Winter, C. Wittek, M. Wobisch, E. Wünsch, J. Žáček, D. Zarbock, Z. Zhang, A. Zhokin, P. Zini, F. Zomer, J. Zsembery, K. Zuber, M. zurNedden, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Detector, FOS: Physical sciences, Parton, HERA, Radiation, Deep inelastic scattering, 01 natural sciences, Charged particle, Spectral line, law.invention, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), law, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, Collider, Nuclear Experiment, Astrophysics::Galaxy Astrophysics
Abstract: Transverse momentum spectra of charged particles produced in deep inelastic scattering are measured as a function of the kinematic variables x_B and Q2 using the H1 detector at the ep collider HERA. The data are compared to different parton emission models, either with or without ordering of the emissions in transverse momentum. The data provide evidence for a relatively large amount of parton radiation between the current and the remnant systems., 21 pages, latex, 7 Figures
Published: 1996

6. A search for leptoquarks at HERA

Author: S. Aid, V. Andreev, B. Andrieu, R.-D. Appuhn, M. Arpagaus, A. Babaev, J. Bähr, J. Bán, Y. Ban, P. Baranov, E. Barrelet, R. Barschke, W. Bartel, M. Barth, U. Bassler, H.P. Beck, H.-J. Behrend, A. Belousov, Ch. 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, Ch. 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. Duhm, 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. Felst, 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. Grässler, R. Grässler, 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. Hiller, 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. Jacholkowska, 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. Kleinwort, 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, Ch. 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, H. Meyer, J. Meyer, P.-O. Meyer, A. Migliori, S. Mikocki, D. Milstead, J. Moeck, F. Moreau, J.V. Morris, E. Mroczko, D. Müller, G. Müller, K. Müller, P. Murín, V. Nagovizin, R. Nahnhauer, B. Naroska, Th. Naumann, P.R. Newman, D. Newton, D. Neyret, H.K. Nguyen, T.C. Nicholls, F. Niebergall, C. Niebuhr, Ch. 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. Schröder, 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. Steiner, 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, Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), H1, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Coupling, Nuclear and High Energy Physics, Particle physics, Luminosity (scattering theory), 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Yukawa potential, FOS: Physical sciences, HERA, Type (model theory), 01 natural sciences, Standard Model, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Leptoquark, High Energy Physics::Experiment, 010306 general physics, Lepton
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 leptoquarks 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 $e^+$-{\it 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 $\sqrt{ 4 \pi \alpha_{em}}$. For leptoquarks with lepton flavour violating couplings, masses up to $225 \GeV$ are excluded for the first time in a direct search for couplings with leptons of the second or third generation larger than $\sqrt{ 4 \pi \alpha_{em}}$. 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., Comment: 16 pages, latex, 4 figures appended as uuencoded file
Published: 1996

7. Leptoquarks and Compositeness Scales from a Contact Interaction Analysis of Deep Inelastic $e^\pm \, p$ Scattering at HERA

Author: J. Feltesse, S. Levonian, M. Wagener, M. Korn, K. Flamm, J. Žáček, R. Buchholz, R. M. Martin, David Milstead, G. Weber, U. Straumann, A. Meyer, P. A. Smirnov, Steve McMahon, P. I. P. Kalmus, J. Riedlberger, S. Mani, H. P. Beck, A. Braemer, V. Korbel, J. Martens, Th. Naumann, K. Rosenbauer, Stephen Burke, Gianfranco Sciacca, Murrough Landon, Armen Vartapetian, M. Oakden, H. Duhm, J. V. Morris, G. Schmidt, J. Janoth, A. E. Wright, F. Kole, Dusan Bruncko, U. Stößlein, F. Linsel, J. Heatherington, J. Garvey, F. Zomer, D. Newton, S. M. Robertson, P. Lanius, Markus Seidel, A. Glazov, V. Tchernyshov, E. Gabathuler, B. Naroska, F. Ferrarotto, Daniel Pitzl, A. Rostovtsev, H. Meyer, S. Kermiche, K. Gabathuler, A. Buniatian, L. Del Buono, A. M. Fomenko, H. Genzel, Volker Blobel, V. Andreev, G. Thompson, V.L. Hudgson, V. Lubimov, Stephen Maxfield, K. C. Hoeger, T.C. Nicholls, M. Hütte, S. K. Kotelnikov, A. Droutskoi, C. Keuker, D. Wegener, W.J. Haynes, M. Forbush, T. Greenshaw, L. Hajduk, M. J. Burton, J.P. Phillips, M. David, Klaus Rabbertz, V. Riech, S. Reinshagen, S. Tapprogge, H. Ehrlichmann, D. Düllmann, L. R. West, W.D. Dau, J. B. Dainton, R. Maraček, L. N. Shtarkov, Benno List, Didier Lacour, G. Pope, H. Itterbeck, W. von Schlippe, J. Stiewe, P. Van Mechelen, H. Henschel, S. Spielman, A. B. Clegg, R. Rylko, Andrew Mehta, Yves Sirois, I. R. Kenyon, T. Köhler, M. W. Krasny, S. Eichenberger, H. J. Behrend, J.C. Bizot, M. Goldberg, A. Panitch, T. Merz, M. Hapke, F. Lehner, D. Lüke, H. Spitzer, Christophe Royon, Paul Richard Newman, Grzegorz Nowak, C. Jacobsson, P. Van Esch, M. Arpagaus, E. Wünsch, V. Efremenko, Dave Sankey, Claus Kleinwort, Barbara Clerbaux, G. Villet, Pierre Marage, J. Lipinski, J. Bähr, Winston Ko, P. Baranov, G. Franke, N. Gogitidze, C. Pascaud, Peter Schleper, E. Evrard, K. Rüter, C. Niebuhr, W. Hildesheim, A. Courau, K. Stephens, E. Peppel, T. Krämerkämper, Jean-Arcady Meyer, C. A. Meyer, G. D. Patel, Guenter Eckerlin, André Schöning, M. Flieser, R. Gerhards, S. Mikocki, S. Willard, Marc Besancon, D. Goldner, J. Stier, Y. Soloviev, J. W. Lomas, A. Gruber, A. Migliori, G. Martin, I. Sheviakov, J. M. Link, Peter Schacht, G. C. Lopez, A.S. Belousov, Sergey Rusakov, David Schmidt, B. Delcourt, J. Marks, Y. Vazdik, P. Truöl, U. Krüger, Daniel Johnson, R. Nisius, A. Gellrich, R. Roosen, P. E. Reimer, C. Cormack, C. Leverenz, G. Bertrand-Coremans, K. Daum, M. Winde, A. Lebedev, S. Egli, Gregorio Bernardi, V. Boudry, P. Goritchev, P. Uelkes, J. Martyniak, L. Johnson, S. Dagoret, F. Lamarche, O. Hamon, L. Goerlich, M. Rietz, D. Haidt, Anton Babaev, G. G. Winter, M. Nyberg-Werther, B. Fominykh, M. Charlet, P. Loch, K. Rybicki, L. Criegee, C. Thiebaux, J. Ebert, J. Spiekermann, V. Solochenko, U. Kathage, R. Starosta, G. Cozzika, J. Strachota, T. R. Ebert, R. Bernet, Christoph Grab, H. E. Roloff, F. Eisele, V. Brisson, Yong Ban, N. Magnussen, J. Ferencei, V I. Shekelyan, K. Wacker, R. Steinberg, Wolfram Erdmann, Eram Rizvi, G. Heinzelmann, M. Fleischer, Emmanuelle Perez, G. Lobo, J. Formánek, Stefan Valkar, E. Mroczko, M. Gebauer, F. Sefkow, J. R. Smith, E. Eisenhandler, P. Verrecchia, P. Steffen, Ch. Ley, A. Fedotov, Günter Flügge, T. P. Yiou, M. zurNedden, N. Sahlmann, E. Schuhmann, Eckhart Fretwurst, H. Küster, Hannes Jung, D. Neyret, T. Mavroidis, D. Vandenplas, Alexander Zhokin, Leif J. Jönsson, Hermann Kolanoski, D. Clarke, John A Coughlan, G. Knies, Horst Oberlack, A. Wagener, S. Schiek, P. Biddulph, V. Schröder, R. Nahnhauer, E. Barrelet, David Cussans, C. Kiesling, A. De Roeck, A. J. Campbell, B. Schwab, Pavel Murin, H. Grässler, M. Ibbotson, H. Lohmander, A. Wegner, M. A. Jabiol, H. H. Kaufmann, Eckhard Elsen, J. Duboc, B. Stella, E. A. De Wolf, Ch. Berger, Karlheinz Meier, H. K. Nguyen, I. V. Gorelov, K. Müller, P. Bispham, T. Kurča, D. Zarbock, H. P. Wellisch, U. Bassler, Martin Erdmann, C. Wittek, L. Büngener, H. Hufnagel, R. Grässler, Ch. Coutures, W. Struczinski, J. M. Foster, Max Weber, D. Feeken, E. Panaro, J. Kurzhöfer, V. Nagovizin, I. Herynek, S. Aid, R. Barschke, U. Obrock, C.D. Hilton, J.G. Contreras, P. Ribarics, R. Felst, K. Zuber, R. Eichler, J. Haack, Laurent Favart, T. Carli, G. W. Noyes, J. Cvach, Ch. Niedzballa, C. Dollfus, G. Müller, F. Niebergall, I. O. Skillicorn, H. B. Dreis, Carl R. Brune, M. Barth, F. Rouse, D. Mercer, Ulrich Goerlach, R. Marshall, S. Masson, Dirk Krücker, H. Krehbiel, Zhen Zhang, G. Buschhorn, D. Ozerov, H. U. Martyn, Matthias Klein, A. Usik, M. Jaffre, J. E. Olsson, W. Bartel, A. Walther, F. W. Büsser, W. Zimmermann, W. Braunschweig, R. Sell, S. Kazarian, U. Siewert, U. Krüner-Marquis, M. Zimmer, Jean-Francois Laporte, Frank Raupach, N. Wulff, P. Kasselmann, K. H. Hiller, R. C. W. Henderson, J. Tutas, J. D. Burger, R. Prosi, C. Vallée, M. Höppner, K. Stolze, S. Prell, R. D. Appuhn, B. Gonzalez-Pineiro, G. Siegmon, R. L. Lander, R. Kaschowitz, J. H. Köhne, Roland Horisberger, A. Valkárová, R. Beyer, S. Riess, F. Moreau, J. Hladký, J. D. Dowell, G. Lindström, C. Gruber, E. Malinovski, M. Kuhlen, A. Jacholkowska, P. Hill, J. Bán, G. Grindhammer, S. D. Kolya, D. Kant, Kerstin Borras, A. Semenov, F. Brasse, T. Jansen, F. Charles, J. Katzy, H. Rick, G. Rädel, M. F. Hess, P. Kostka, M. Hampel, B. Kuznik, R. J. Ellison, Ph. Huet, J. Turnau, Ch. Pichler, S. Schleif, M. Steenbock, J. P. Sutton, P. Di Nezza, B. Andrieu, Wolfgang Lange, J. Gayler, Peter Robmann, O. Dünger, and F. Botterweck
Subjects: Quark, Physics, Nuclear and High Energy Physics, Particle physics, Scattering, Physics beyond the Standard Model, Hadron, High Energy Physics::Phenomenology, Form factor (quantum field theory), FOS: Physical sciences, HERA, Standard Model, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), High Energy Physics::Experiment, Lepton
Abstract: A contact interaction analysis is presented to search for new phenomena beyond the Standard Model in deep inelastic $e^\pm p \rightarrow e^\pm \, hadrons$ scattering. The data are collected with the H1 detector at HERA and correspond to integrated luminosities of $0.909 \ {\rm pb}^{-1}$ and $2.947 \ {\rm pb}^{-1}$ for electron and positron beams, respectively. The differential cross sections $d\sigma / dQ^2$ are measured in the $Q^2$ range bet\-ween $160 \ \GeV^2$ and $20,000 \ \GeV^2$. The absence of any significant deviation from the Standard Model prediction is used to constrain the couplings and masses of new leptoquarks and to set limits on electron--quark compositeness scales and on the radius of light quarks., Comment: 16 pages, latex, 2 figures appended as uuencoded file
Published: 1995

8. Inclusive parton cross sections in photoproduction and photon structure

Author: T. Ahmed, S. Aid, V. Andreev, B. Andrieu, R.-D. Appuhn, M. Arpagaus, A. Babaev, J. Baehr, J. Bán, Y. Ban, P. Baranov, E. Barrelet, W. Bartel, M. Barth, U. Bassler, H.P. Beck, H.-J. Behrend, A. Belousov, Ch. 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, F. Brasse, W. Braunschweig, V. Brisson, D. Bruncko, C. Brune, R. Buchholz, L. Büngener, J. Bürger, F.W. Büsser, A. Buniatian, S. Burke, M. Burton, G. Buschhorn, A.J. Campbell, T. Carli, F. Charles, M. Charlet, D. Clarke, A.B. Clegg, B. Clerbaux, M. Colombo, J.G. Contreras, C. Cormack, J.A. Coughlan, A. Courau, Ch. Coutures, G. Cozzika, L. Criegee, D.G. Cussans, J. Cvach, S. Dagoret, J.B. Dainton, W.D. Dau, K. Daum, M. David, B. Delcourt, L. Del Buono, A. De Roeck, E.A. De Wolf, P. Di Nezza, C. Dollfus, J.D. Dowell, H.B. Dreis, A. Droutskoi, J. Duboc, D. Düllmann, O. Dünger, H. Duhm, J. Ebert, T.R. Ebert, G. Eckerlin, V. Efremenko, S. Egli, H. Ehrlichmann, S. Eichenberger, R. Eichler, F. Eisele, E. Eisenhandler, R.J. Ellison, E. Elsen, M. Erdmann, W. Erdmann, E. Evrard, L. Favart, A. Fedotov, D. Feeken, R. Felst, 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, K. Gamerdinger, J. Garvey, J. Gayler, M. Gebauer, A. Gellrich, H. Genzel, R. Gerhards, U. Goerlach, L. Goerlich, N. Gogitidze, M. Goldberg, D. Goldner, B. Gonzalez-Pineiro, I. Gorelov, P. Goritchev, C. Grab, H. Grässler, R. Grässler, T. Greenshaw, G. Grindhammer, A. Gruber, C. Gruber, J. Haack, D. Haidt, L. Hajduk, O. Hamon, M. Hampel, E.M. Hanlon, M. Hapke, W.J. Haynes, J. Heatherington, G. Heinzelmann, R.C.W. Henderson, H. Henschel, I. Herynek, M.F. Hess, W. Hildesheim, P. Hill, K.H. Hiller, C.D. Hilton, J. Hladký, K.C. Hoeger, M. Höppner, R. Horisberger, V.L. Hudgson, Ph. Huet, M. Hütte, H. Hufnagel, M. Ibbotson, H. Itterbeck, M.-A. Jabiol, A. Jacholkowska, C. Jacobsson, M. Jaffre, J. Janoth, T. Jansen, L. Jönsson, D.P. Johnson, L. Johnson, H. Jung, P.I.P. Kalmus, D. Kant, R. Kaschowitz, P. Kasselmann, U. Kathage, J. Katzy, H.H. Kaufmann, S. Kazarian, I.R. Kenyon, S. Kermiche, C. Keuker, C. Kiesling, M. Klein, C. Kleinwort, 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, J.P. Kubenka, H. Küster, M. Kuhlen, T. Kurča, J. Kurzhöfer, B. Kuznik, D. Lacour, F. Lamarche, R. Lander, M.P.J. Landon, W. Lange, P. Lanius, J.-F. Laporte, A. Lebedev, C. Leverenz, S. Levonian, Ch. Ley, A. Lindner, G. Lindström, J. Link, F. Linsel, J. Lipinski, B. List, G. Lobo, P. Loch, H. Lohmander, J. Lomas, G.C. Lopez, V. Lubimov, D. Lüke, N. Magnussen, E. Malinovski, S. Mani, R. Maraček, P. Marage, J. Marks, R. Marshall, J. Martens, R. Martin, H.-U. Martyn, J. Martyniak, S. Masson, T. Mavroidis, S.J. Maxfield, S.J. McMahon, A. Mehta, K. Meier, D. Mercer, T. Merz, C.A. Meyer, H. Meyer, J. Meyer, A. Migliori, S. Mikocki, D. Milstead, F. Moreau, J.V. Morris, E. Mroczko, G. Müller, K. Müller, P. Murín, V. Nagovizin, R. Nahnhauer, B. Naroska, Th. Naumann, P.R. Newman, D. Newton, D. Neyret, H.K. Nguyen, T.C. Nicholls, F. Niebergall, C. Niebuhr, Ch. Niedzballa, R. Nisius, G. Nowak, G.W. Noyes, M. Nyberg-Werther, M. Oakden, H. Oberlack, U. Obrock, J.E. Olsson, D. Ozerov, E. Panaro, A. Panitch, C. Pascaud, G.D. Patel, E. Peppel, E. Perez, J.P. Phillips, Ch. Pichler, A. Pieuchot, D. Pitzl, G. Pope, S. Prell, R. Prosi, K. Rabbertz, G. Rädel, F. Raupach, P. Reimer, S. Reinshagen, P. Ribarics, H. Rick, V. Riech, J. Riedlberger, 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, R. Rylko, N. Sahlmann, S.G. Salesch, E. Sanchez, D.P.C. Sankey, P. Schacht, S. Schiek, P. Schleper, W. von Schlippe, C. Schmidt, D. Schmidt, G. Schmidt, A. Schöning, V. Schröder, E. Schuhmann, B. Schwab, A. Schwind, F. Sefkow, M. Seidel, R. Sell, A. Semenov, V. Shekelyan, I. Sheviakov, H. Shooshtari, L.N. Shtarkov, G. Siegmon, U. Siewert, Y. Sirois, I.O. Skillicorn, P. Smirnov, J.R. Smith, V. Solochenko, Y. Soloviev, J. Spiekermann, S. Spielman, H. Spitzer, R. Starosta, M. Steenbock, P. Steffen, R. Steinberg, B. Stella, K. Stephens, J. Stier, J. Stiewe, U. Stösslein, K. Stolze, J. Strachota, U. Straumann, W. Struczinski, J.P. Sutton, S. Tapprogge, V. Tchernyshov, C. Thiebaux, G. Thompson, P. Truöl, J. Turnau, J. Tutas, P. Uelkes, A. Usik, S. Valkár, A. Valkárová, C. Vallée, P. Van Esch, P. Van Mechelen, A. Vartapetian, Y. Vazdik, P. Verrecchia, G. Villet, K. Wacker, A. Wagener, M. Wagener, I.W. Walker, A. Walther, G. Weber, M. Weber, D. Wegener, A. Wegner, H.P. Wellisch, L.R. West, S. Willard, M. Winde, G.-G. Winter, C. Wittek, A.E. Wright, E. Wünsch, N. Wulff, T.P. Yiou, J. Žáček, D. Zarbock, Z. Zhang, A. Zhokin, M. Zimmer, W. Zimmermann, F. Zomer, K. Zuber, Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and Starita, Sabine
Subjects: Nuclear and High Energy Physics, Particle physics, Photon, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Parton, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, Nuclear physics, Momentum, High Energy Physics - Experiment (hep-ex), Factorization, 0103 physical sciences, Bibliography, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, Nuclear Experiment, Quantum chromodynamics, Physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, HERA, Gluon, High Energy Physics::Experiment
Abstract: Photoproduction of 2-jet events is studied with the H1 detector at HERA. Parton cross sections are extracted from the data by an unfolding method using leading order parton-jet correlations of a QCD generator. The gluon distribution in the photon is derived in the fractional momentum range $0.04\le x_\gamma \le 1$ at the average factorization scale $75$ GeV$^2$., Comment: 23 pages, latex, 10 figures appended as uuencoded file, misprint corrected
Published: 1995

9. Determination of the strong coupling constant from jet rates in deep inelastic scattering

Author: E. Evrard, F. Kole, T. P. Yiou, U. Bassler, B. Gonzalez-Pineiro, P. Ribarics, Armen Vartapetian, J. Garvey, B. Delcourt, R. Felst, A. M. Fomenko, M. Colombo, C. Leverenz, S. Tapprogge, A. Droutskoi, W.D. Dau, J. B. Dainton, R. L. Lander, Peter Robmann, Murrough Landon, A. E. Wright, C. A. Meyer, K. H. Hiller, H. U. Martyn, L. Del Buono, M. Htte, C. Vallée, A. Gruber, S. Eichenberger, R. Nahnhauer, K. Stephens, E. Peppel, P. E. Reimer, C. Cormack, Alan Campbell, N. Magnussen, R. D. Appuhn, N. Sahlmann, E. Schuhmann, E. Barrelet, David Cussans, M. A. Jabiol, E. A. De Wolf, Ch. Berger, H. Itterbeck, P. Van Mechelen, H. Erlichmann, E. M. Hanlon, C. Niebuhr, S. Aid, G. G. Winter, K. Mller, M. Kuhlen, F. Botterweck, A. Mavroidis, F. Charles, E. Eisenhandler, S. Egli, T. Jansen, G. Grindhammer, M. Nyberg-Werther, P. Steffen, U. Krner-Marquis, G. Cozzika, F. Eisele, D. Goldner, D. Krcker, M. F. Hess, E. Prez, J. Kurzhfer, R. Taylor, E. Snchez, I. Herynek, J.P. Phillips, S. Mani, H. P. Beck, Stephen Burke, O. Hamon, V. Schrder, H. Rick, M. Vecko, C. Gruber, H. Grssler, M. Hampel, B. Kuznik, J. Turnau, M. Korn, R. Starosta, Stephen Maxfield, Hannes Jung, Steve McMahon, S. Levonian, A. Gellrich, D. Mercer, M. Steenbock, Paul Richard Newman, Grzegorz Nowak, C. Jacobsson, I. W. Walker, K. Daum, D. Zarbock, Alexander Zhokin, H. P. Wellisch, Ph. Huet, Max Weber, R. J. Ellison, G. Mller, Christoph Grab, Ch. Pichler, S. Prell, G. Weber, U. Straumann, F. Lamarche, M. Wagener, S. Masson, U. Seehausen, F. Sefkow, T. Carli, B. Andrieu, J. Stiewe, A. Lindner, J. Janoth, M. Burton, G. Knies, P. Trul, A. B. Clegg, R. Rylko, K. Rosenbauer, K. Flamm, V. Chernyshov, M. Hppner, S. Schiek, G. Flgge, Andrew Mehta, D. Kant, J. Feltesse, T. R. Ebert, F. Linsel, Hermann Kolanoski, K. C. Hoeger, T.C. Nicholls, G. Siegmon, R. Kaschowitz, K. Johannsen, P. Verrecchia, Christophe Royon, O. Dnger, D. Clarke, Tim Greenshaw, Roland Horisberger, F. Zomer, A. Fedotov, M. Jaffré, Volker Blobel, Kerstin Borras, A. Semenov, N. Gogitidze, J. Haack, C. Keuker, Zhen Zhang, J. Heatherington, H. H. Kaufmann, S. Riess, G. Thompson, R. Beyer, K. Rter, U. Kathage, John A Coughlan, Max Klein, Horst Oberlack, V. Riech, D. Newton, F. Moreau, S. Valkr, P. Baranov, E. Malinovskii, B. Naroska, P. I. P. Kalmus, I. O. Skillicorn, H. B. Dreis, Peter Schleper, J. Buerger, J. D. Dowell, G C. Lpez, Yu. Solovev, J. Formnek, E. Gabathuler, C. Schmidt, J. P. Sutton, P. Di Nezza, Winston Ko, M. Hapke, F. Brasse, F W. Bsser, P. Hill, J. Bán, B. Stella, J. Khne, T. Krmerkmper, R. Buchholz, Daniel Pitzl, A. Jacholkowska, C. Pascaud, B. Schwab, A. Braemer, V. Lubimov, E. Wnsch, P. Lanius, E. Mroczko, Guenter Eckerlin, V. Brisson, Wolfgang Lange, Marc Besancon, David Milstead, Benno List, A.S. Belousov, P. A. Smirnov, K. Meier, H. J. Behrend, J.C. Bizot, Barbara Clerbaux, Mikhail Danilov, Judith Katzy, Carl R. Brune, M. Barth, M. Goldberg, Markus Seidel, A. De Roeck, R. Gerhards, S. K. Kotelnikov, J. Ebert, L. Hajduk, H. Henschel, R. C. W. Henderson, Laurent Favart, R. Roosen, L. N. Shtarkov, J. Martyniak, J. Tutas, A. Panitch, C. Dollfus, F. Rouse, L. Jnsson, R. Prosi, J. Hladky, Ch. Ley, J. Riedlberger, Ulrich Goerlach, T. Kurča, S. M. Robertson, A. Usik, H. Bergstein, B. Fominykh, Yves Sirois, Peter Loch, Wolfram Erdmann, D. Schmidt, T. Khler, R. D. Martin, A. Wegner, Didier Lacour, A. Wagener, Eckhart Fretwurst, S. D. Kolya, Th. Naumann, Peter Schacht, U. Stsslein, G. Pope, H. Duhm, J. Lipinski, G. Franke, G. Villet, J. E. Olsson, H. K. Nguyen, I. V. Gorelov, Gregorio Bernardi, V. Boudry, T. Ahmed, Pierre Marage, Anton Babaev, C. Thiebaux, Ch. Coutures, W. Struczinski, W. Bartel, J. Strachota, R. Grssler, H. Hufnagel, J. M. Foster, E. Deffur, M. Savitsky, K. Zuber, P. Goritchev, P. Kostka, a A. Akhundov, V L. Hudgson, A. Courau, S. Kermiche, E. Panaro, J. Cvach, D. Dllmann, C.D. Hilton, J.G. Contreras, R. Bernet, K. Gamerdinger, J. Duboc, D. Neyret, W. Braunschweig, M. David, R. Eichler, H. E. Roloff, R. Sell, J. P. Kubenka, S. Kazarian, M. Flieser, U. Siewert, E. Rizvi, G. W. Noyes, J. Stier, Y. Vazdik, M. Zimmer, Jean-Francois Laporte, P. Murn, H. Kster, G. Lindstrm, H. Lohmander, S. Dagoret, A. Valkrov, D. Feeken, J. Ferencei, V I. Shekelyan, W. Hildesheim, K. Wacker, R. Steinberg, Frank Raupach, Dusan Bruncko, I. R. Kenyon, H. Spitzer, F. Ferrarotto, H. Genzel, N. Wulff, J. Spiekermann, P. Kasselmann, P. Van Esch, E. Elsen, J. Marks, G. Rdel, A. Rostovtsev, Claus Kleinwort, S. Willard, U P. Krger, Martin Erdmann, U. Obrock, F. Niebergall, V. Korbel, Vladimir Andreev, L. Grlich, M. Winde, P. Uelkes, L. Johnson, G. Bertrand-Coremans, L. Criegee, S. Reinshagen, C. Kiesling, S. Rusakov, M. Gebauer, V. Nagovitsin, M. Arpagaus, K. Gabathuler, K. Rybicki, A. Buniatian, D. Wegener, W.J. Haynes, J. Zcek, L. R. West, M. W. Krasny, H. Krehbiel, G. Buschhorn, V. Efremenko, A. Walther, W. Zimmermann, S. Mikocki, J. Baehr, A. Schning, J. Gayler, D. Lke, R. Marshall, Dave Sankey, G. D. Patel, H. Meyer, D.P. Johnson, J. V. Morris, G. Schmidt, M. Forbush, A. Schwind, R. Maraček, J-P. Meyer, W. von Schlippe, A. Lebedev, T. Merz, M. Ibbotson, M. Rietz, D. Haidt, G. Heinzelmann, M. Fleischer, M. Oakden, H. Shooshtari, R. Nisius, J. R. Smith, L. Buengener, I. Shevyakov, J. Martens, Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: Physics, Quantum chromodynamics, Nuclear and High Energy Physics, Annihilation, Proton, 010308 nuclear & particles physics, Perturbative QCD, Parton, HERA, Jet (particle physics), Deep inelastic scattering, 01 natural sciences, Nuclear physics, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics
Abstract: Jet rates in deep inelastic electron proton scattering are studied with the H1 detector at HERA for momentum transfers squared between 10 and 4000 GeV 2 . It is shown that they can be quantitatively described by perturbative QCD in next to leading order making use of the parton densities of the proton and with the strong coupling constant α s as a free parameter. The measured value, α s ( M Z 2 ) = 0.123 ± 0.018, is in agreement both with determinations from e + e − annihilation at LEP using the same observable and with the world average.
Published: 1995

10. First measurement of the deep-inelastic structure of proton diffraction

Author: T. Ahmed, S. Aid, V. Andreev, B. Andrieu, R.-D. Appuhn, M. Arpagaus, A. Babaev, J. Baehr, J. Bán, Y. Ban, P. Baranov, E. Barrelet, W. Bartel, M. Barth, U. Bassler, H.P. Beck, H.-J. Behrend, A. Belousov, Ch. 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, F. Brasse, W. Braunschweig, V. Brisson, D. Bruncko, C. Brune, R. Buchholz, L. Büngener, J. Bürger, F.W. Büsser, A. Buniatian, S. Burke, M. Burton, G. Buschhorn, A.J. Campbell, T. Carli, F. Charles, D. Clarke, A.B. Clegg, B. Clerbaux, M. Colombo, J.G. Contreras, C. Cormack, J.A. Coughlan, A. Courau, Ch. Coutures, G. Cozzika, L. Criegee, D.G. Cussans, J. Cvach, S. Dagoret, J.B. Dainton, W.D. Dau, K. Daum, M. David, E. Deffur, B. Delcourt, L. Del Buono, A. De Roeck, E.A. De Wolf, P. Di Nezza, C. Dollfus, J.D. Dowell, H.B. Dreis, A. Droutskoi, J. Duboc, D. Düllmann, O. Dünger, H. Duhm, J. Ebert, T.R. Ebert, G. Eckerlin, V. Efremenko, S. Egli, H. Ehrlichmann, S. Eichenberger, R. Eichler, F. Eisele, E. Eisenhandler, R.J. Ellison, E. Elsen, M. Erdmann, W. Erdmann, E. Evrard, L. Favart, A. Fedotov, D. Feeken, R. Felst, J. Feltesse, J. Ferencei, F. Ferrarotto, K. Flamm, M. Fleischer, M. Flieser, G. Flügge, A. Fomenko, M. Forbush, J. Formánek, J.M. Foster, G. Franke, E. Fretwurst, E. Gabathuler, K. Gabathuler, K. Gamerdinger, J. Garvey, J. Gayler, M. Gebauer, A. Gellrich, H. Genzel, R. Gerhards, U. Goerlach, L. Goerlich, N. Gogitidze, M. Goldberg, D. Goldner, B. Gonzalez-Pineiro, I. Gorelov, P. Goritchev, C. Grab, H. Grässler, R. Grässler, T. Greenshaw, G. Grindhammer, A. Gruber, C. Gruber, J. Haack, D. Haidt, L. Hajduk, O. Hamon, M. Hampel, E.M. Hanlon, M. Hapke, W.J. Haynes, J. Heatherington, G. Heinzelmann, R.C.W. Henderson, H. Henschel, I. Herynek, M.F. Hess, W. Hildesheim, P. Hill, K.H. Hiller, C.D. Hilton, J. Hladký, K.C. Hoeger, M. Höppner, R. Horisberger, V.L. Hudgson, Ph. Huet, M. Hütte, H. Hufnagel, M. Ibbotson, H. Itterbeck, M.-A. Jabiol, A. Jacholkowska, C. Jacobsson, M. Jaffre, J. Janoth, T. Jansen, L. Jönsson, D.P. Johnson, L. Johnson, H. Jung, P.I.P. Kalmus, D. Kant, R. Kaschowitz, P. Kasselmann, U. Kathage, J. Katzy, H.H. Kaufmann, S. Kazarian, I.R. Kenyon, S. Kermiche, C. Keuker, C. Kiesling, M. Klein, C. Kleinwort, G. Knies, W. Ko, T. Köhler, J.H. Köhne, H. Kolanoski, F. Kole, S.D. Kolva, V. Korbel, M. Korn, P. Kostka, S.K. Kotelnikov, T. Krämerkämper, M.W. Krasny, H. Krehbiel, D. Krücker, U. Krüger, U. Krüner-Marquis, J.P. Kubenka, H. Küster, M. Kuhlen, T. Kurča, J. Kurzhöfer, B. Kuznik, D. Lacour, F. Lamarche, R. Lander, M.P.J. Landon, W. Lange, P. Lanius, J.-F. Laporte, A. Lebedev, C. Leverenz, S. Levonian, Ch. Ley, A. Lindner, G. Lindström, J. Link, F. Linsel, J. Lipinski, B. List, G. Lobo, P. Loch, H. Lohmander, J. Lomas, G.C. Lopez, V. Lubimov, D. Lüke, N. Magnussen, E. Malinovski, S. Mani, R. Maraček, P. Marage, J. Marks, R. Marshall, J. Martens, R. Martin, H.-U. Martyn, J. Martyniak, S. Masson, T. Mavroidis, S.J. Maxfield, S.J. McMahon, A. Mehta, K. Meier, D. Mercer, T. Merz, C.A. Meyer, H. Meyer, J. Meyer, S. Mikocki, D. Milstead, F. Moreau, J.V. Morris, E. Mroczko, G. Müller, K. Müller, P. Murín, V. Nagovizin, R. Nahnhauer, B. Naroska, Th. Naumann, P.R. Newman, D. Newton, D. Neyret, H.K. Nguyen, T.C. Nicholls, F. Niebergall, C. Niebuhr, Ch. Niedzballa, R. Nisius, G. Nowak, G.W. Noyes, M. Nyberg-Werther, M. Oakden, H. Oberlack, U. Obrock, J.E. Olsson, D. Ozerov, E. Panaro, A. Panitch, C. Pascaud, G.D. Patel, E. Peppel, E. Perez, J.P. Phillips, Ch. Pichler, D. Pitzl, G. Pope, S. Prell, R. Prosi, K. Rabbertz, G. Rädel, F. Raupach, P. Reimer, S. Reinshagen, P. Ribarics, H. Rick, V. Riech, J. Riedlberger, 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, R. Rylko, N. Sahlmann, E. Sanchez, D.P.C. Sankey, P. Schacht, S. Schiek, P. Schleper, W. von Schlippe, C. Schmidt, D. Schmidt, G. Schmidt, A. Schöning, V. Schröder, E. Schuhmann, B. Schwab, A. Schwind, F. Sefkow, M. Seidel, R. Sell, A. Semenov, V. Shekelyan, I. Sheviakov, H. Shooshtari, L.N. Shtarkov, G. Siegmon, U. Siewert, Y. Sirois, I.O. Skillicorn, P. Smirnov, J.R. Smith, V. Solochenko, Y. Soloviev, J. Spiekermann, H. Spitzer, R. Starosta, M. Steenbock, P. Steffen, R. Steinberg, B. Stella, K. Stephens, J. Stier, J. Stiewe, U. Stösslein, K. Stolze, J. Strachota, U. Straumann, W. Struczinski, J.P. Sutton, S. Tapprogge, R.E. Taylor, V. Tchernyshov, C. Thiebaux, G. Thompson, P. Truöl, J. Turnau, J. Tutas, P. Uelkes, A. Usik, S. Valkár, A. Valkárová, C. Vallée, P. Van Esch, P. Van Mechelen, A. Vartapetian, Y. Vazdik, P. Verrecchia, G. Villet, K. Wacker, A. Wagener, M. Wagener, I.W. Walker, A. Walther, G. Weber, M. Weber, D. Wegener, A. Wegner, H.P. Wellisch, L.R. West, S. Willard, M. Winde, G.-G. Winter, C. Wittek, A.E. Wright, E. Wünsch, N. Wulff, T.P. Yiou, J. Žáček, D. Zarbock, Z. Zhang, A. Zhokin, M. Zimmer, W. Zimmermann, F. Zomer, K. Zuber, Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)
Subjects: Diffraction, Physics, Nuclear and High Energy Physics, Proton, 010308 nuclear & particles physics, Scattering, Hadron, FOS: Physical sciences, HERA, Scale invariance, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Cross section (physics), Pomeron, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics
Abstract: A measurement is presented, using data taken with the H1 detector at HERA, of the contribution of diffractive interactions to deep-inelastic electron-proton scattering. The diffractive contribution to the proton structure function is evaluated as a function of the appropriate deep-inelastic scattering variables using a class of deep-inelastic ep scattering events with no hadronic energy flow in an interval of pseudo-rapidity adjacent to the proton beam direction. The dependence of this contribution on x-pomeron is consistent with both a diffractive interpretation and a factorisable ep diffractive cross section. A first measurement of the deep-inelastic structure of the pomeron in the form of a factorised structure function is presented. This structure function is observed to be consistent with scale invariance., 16 pages, latex, including 3 figures
Published: 1995

11. A study of the fragmentation of quarks in $e^-p$ collisions at Hera

Author: J. E. Olsson, W. Bartel, M. Oakden, F. Kole, F. W. Büsser, H. Meyer, W. Braunschweig, S. Levonian, R. Sell, S. Kazarian, U. Krüner-Marquis, M. Wagener, K. C. Hoeger, T.C. Nicholls, U. Siewert, J. V. Morris, M. Zimmer, J. Gayler, S. Aid, L. Del Buono, G. Schmidt, T. Jansen, E. Fretwurst, V. Andreev, H. Rick, Jean-Francois Laporte, G. Rädel, H. Shooshtari, V. Riech, M. Hampel, B. Kuznik, K. Flamm, Ph. Huet, Ch. Pichler, E. Evrard, C. A. Meyer, R. M. Martin, E. Sanchez, M. Hapke, Wolfram Erdmann, A. Gruber, J. H. Köhne, P. Loch, P. I. P. Kalmus, A. Schwind, Ch. Ley, R. Marshall, Dirk Krücker, R. Maraček, H. Ehrlichmann, M. Nyberg-Werther, E. Malinovski, W. von Schlippe, J. Martens, D. Mercer, A. Braemer, K. Daum, R. Roosen, B. Delcourt, H. Krehbiel, M. Kuhlen, R. D. Appuhn, Frank Raupach, C. Niebuhr, G. Thompson, T. Merz, G. Grindhammer, U. Stösslein, M. Höppner, S. Prell, Daniel Johnson, Jean-Arcady Meyer, G. Buschhorn, D. Lüke, S. Masson, J. Martyniak, N. Magnussen, D. Feeken, A. Wagener, G. Bertrand-Coremans, C. Leverenz, V. Lubimov, W. Lange, W. Ko, W. Hildesheim, G. Knies, J. Lipinski, D. Goldner, N. Wulff, D. Ozerov, T. R. Ebert, R. Nahnhauer, O. Hamon, A. Fedotov, K. Rosenbauer, Günter Flügge, Y. Soloviev, G. Franke, R. Gerhards, B. Fominykh, Emmanuelle Perez, E. Wünsch, Dave Sankey, T. P. Yiou, H. Spitzerx, J. R. Smith, A. Gellrich, I. V. Gorelov, K. Müller, G. Pope, R. J. Ellison, Martin Erdmann, P. Verrecchia, V. Schröder, R. Bernet, J. Janoth, U. Obrock, F. Niebergall, C. Schmidt, J. P. Sutton, P. Di Nezza, I. W. Walker, H. K. Nguyen, P. Uelkes, L. Johnson, A. Wegner, G. D. Patel, R. Grässler, Ch. Coutures, W. Struczinski, H. H. Kaufmann, Eckhard Elsen, P. Bispham, S. Schiek, J. Haack, L. N. Shtarkov, J. M. Foster, A. Panitch, I. O. Skillicorn, H. B. Dreis, E. Barrelet, G. Nowak, David Cussans, S. Tapprogge, M. Charlet, R. Starosta, Mario David, F. Lamarche, C. Kiesling, W.D. Dau, H. E. Roloff, J. B. Dainton, V. Solochenko, E. Panaro, J. Kurzhöfer, D. Düllmann, P. Goritchev, F. Sefkow, K. Gamerdinger, Peter Robmann, C. Cormack, E. M. Hanlon, S. Reinshagen, L. Criegee, Christoph Grab, A. De Roeck, M. Colombo, A. Courau, C. Gruber, A. J. Campbell, H. Henschel, H. U. Martyn, Matthias Klein, V. Nagovizin, G. G. Winter, R. Nisius, David Schmidt, T. Mavroidis, Murrough Landon, M. Arpagaus, E. A. De Wolf, Ch. Berger, K. Stephens, K. Rybicki, H. J. Behrend, J.C. Bizot, M. Goldberg, R. Eichler, E. Peppel, Karlheinz Meier, Fabian Zomer, K. Zuber, C. Wittek, G. Lindström, T. Krdmerkämper, A. E. Wright, Christophe Royon, K. Rütter, F. Charles, J. Katzy, J. P. Kubenka, L. Jönson, H. Lohmander, N. Sahlmann, A. Jacholkowska, E. Schuhmann, P. Steffen, J. Formánek, A. Pieuchot, E. Mroczko, M. Gebauer, Benno List, A. Lebedev, S. Egli, T. Kurča, F. Rouse, Armen Vartapetian, Barbara Clerbaux, Zhen Zhang, P. Biddulph, G. Cozzika, F. Eisele, Peter Schacht, G. W. Noyes, G. C. Lopez, S. Willard, M. Rietz, D. Haidt, L. Büngener, M. F. Hess, J. Cvach, Ch. Niedzballa, I. Herynek, O. Dünger, M. Forbush, M. A. Jabiol, A. Walther, Stefan Valkar, C. Pascaud, D. Zarbock, F. Botterweck, H. Itterbeck, P. Van Mechelen, H. P. Wellisch, Max Weber, H. Hufnagel, J. Žáček, I. Sheviakov, M. Flieser, Guenter Eckerlin, André Schöning, T. Carli, W. Zimmermann, Eram Rizvi, A. Rostovtsev, A. Usik, G. Heinzelmann, Gregorio Bernardi, U. Krüger, Hannes Jung, S. Kermiche, J. Spiekermann, Alexander Zhokin, Paul Richard Newman, C. Jacobsson, D. Kant, E. Eisenhandler, Anton Babaev, Kerstin Borras, A. Belousov, Hermann Kolanoski, J. Baehr, J. Stier, D. Clarke, John A Coughlan, U. Bassler, M. Fleischer, C. Vallée, C. Thiebaux, C.D. Hilton, J.G. Contreras, Y. Vazdik, Th. Naumann, J. Turnau, I. R. Kenyon, S. Dagoret, V.L. Hudgson, Stephen Maxfield, J. Stiewe, H. Küster, J. Strachota, J. Feltesse, L. Goerlach, A. Droutskoi, A. Semenov, Horst Oberlack, A. B. Clegg, R. Rylko, Andrew Mehta, N. Gogitidze, K. Gabathuler, A. Buniatian, M. Steenbock, P. Reimer, P. Ribarics, J. Ferencei, D. Wegener, W.J. Haynes, J. Garvey, V I. Shekelyan, J. Link, A. M. Fomenko, R. Felst, G. Lobo, U. Kathage, K. Wacker, R. Steinberg, A. Lindner, H. P. Beck, Stephen Burke, H. Duhm, V. Boudry, R. Lander, R. Buchholz, V. Brisson, P. Baranov, David Milstead, P. A. Smirnov, F. Brasse, L. R. West, S. Spielman, Peter Schleper, M. J. Burton, E. Gabathuler, Dusan Bruncko, B. Andrieu, P. Kostka, B. Naroska, J. Ebert, F. Ferrarotto, H. Genzel, P. Kasselmann, Volker Blobel, S. Mani, Marc Besancon, Sergey Rusakov, P. Truöl, T. Köhler, M. W. Krasny, R. Kaschowitz, D. Neyret, C. Keuker, T. Greenshaw, Roland Horisberger, A. Valkárová, S. Eichenberger, S. Riess, Klaus Rabbertz, J.P. Phillips, J. Riedlberger, S. M. Robertson, V. Efremenko, P. Hill, J. Bán, B. Schwab, P. Van Esch, M. Hütte, Pavel Murin, H. Grässler, Claus Kleinwort, S. Mikocki, M. Ibbotson, B. Gonzalez-Pineiro, R. Barschke, Laurent Favart, C. Dollfus, Steve McMahon, Ulrich Goerlach, J. Duboc, B. Stella, M. Jaffre, G. Müller, V. Korbel, Y. Sirois, Carl R. Brune, M. Barth, M. Seidel, Daniel Pitzl, M. Korn, G. Weber, U. Straumann, S. K. Kotelnikov, J. Marks, L. Hajduk, F. Linsel, J. Heatherington, D. Newton, M. Winde, Didier Lacour, G. Villet, Pierre Marage, P. Lanius, V. Tchernyshov, Y. Ban, J. W. Lomas, A. Migliori, G. Siegmon, R. Beyer, F. Moreau, J. Hladký, J. D. Dowell, S. D. Kolya, K. H. Hiller, R. C. W. Henderson, J. Tutas, J. D. Burger, R. Prosi, K. Stolze, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and H1
Subjects: Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Particle physics, Annihilation, 010308 nuclear & particles physics, Quark model, High Energy Physics::Phenomenology, FOS: Physical sciences, Parton, HERA, Inelastic scattering, Deep inelastic scattering, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Pair production, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics
Abstract: Deep inelastic scattering (DIS) events, selected from 1993 data taken by the H1 experiment at HERA, are studied in the Breit frame of reference. The fragmentation function of the quark is compared with those of \ee data. It is shown that certain aspects of the quarks emerging from within the proton in \ep interactions are essentially the same as those of quarks pair-created from the vacuum in \ee annihilation. The measured area, peak position and widthof the fragmentation function show that the kinematic evolution variable, equivalent to the \ee squared centre of mass energy, is in the Breit frame the invariant square of the four-momentum transfer. We comment on the extent to which we have evidence for coherence effects in parton showers., Comment: 18 pages, latex, 7 figures appended as uuencoded file
Published: 1995

12. Observation of hard processes in rapidity gap events in γp interactions at HERA

Author: R. Beyer, V. Lubimov, F. Moreau, J. Hladký, J. D. Dowell, M. Colombo, A. Jacholkowska, Murrough Landon, S. D. Kolya, A. E. Wright, Mikhail Danilov, L. N. Shtarkov, V. Droutskoi, R. Roosen, I. Sheviakov, J. Martyniak, Frank Raupach, K. Rosenbauer, J. M. Foster, E. Malinovski, I. R. Kenyon, A. Panitch, B. Fominykh, R. Nahnhauer, K. C. Hoeger, V. Riech, J. Martens, Peter Robmann, H. Itterbeck, P. Van Mechelen, N. Wulff, M. Kuhlen, M. Savitsky, G. Thompson, A. Lebedev, S. Egli, M. Rietz, D. Haidt, H. Spitzer, G. Heinzelmann, H. Küster, Emmanuelle Perez, P. Kasselmann, G. Grindhammer, H. U. Martyn, Matthias Klein, F. Kole, E. Barrelet, David Cussans, K. Zuber, K. Johannsen, D. Lüke, T. Jansen, U. Krüger, Christophe Royon, M. Nyberg-Werther, S. Dagoret, I.O. Skillicorni, M. Hapke, D. Düllmann, E. A. De Wolf, Ch. Berger, Karlheinz Meier, S. Willard, E. Wünsch, Dave Sankey, G. D. Patel, K. Gabathuler, A. Buniatian, Eckhart Fretwurst, J. Cvach, David Schmidt, J. V. Morris, G. Schmidt, M. Forbush, J. Žáček, A. Schwind, D. Wegener, W.J. Haynes, H. Rick, G. Rädel, H. Henschel, H. J. Behrend, J.C. Bizot, M. Goldberg, L. Büngener, Zhen Zhang, D. Kant, Winston Ko, C. Pascaud, J. Ferencei, Kerstin Borras, K. Daum, V I. Shekelyan, S. Levonian, Jean-Arcady Meyer, M. Hampel, B. Kuznik, M. Wagener, Ph. Huet, T. R. Ebert, G. Cozzika, F. Eisele, R. Gerhards, A. Semenov, I. Herynek, Steve McMahon, M. Winde, Stefan Valkar, S. Tapprogge, O. Dünger, Guenter Eckerlin, A. Usik, André Schöning, G. Knies, S. Mani, K. Wacker, R. Steinberg, W.D. Dau, P. Loch, P. Uelkes, L. Johnson, Ch. Pichler, K. Flamm, A. Fedotov, L. R. West, T. Köhler, M. W. Krasny, Hannes Jung, Alexander Zhokin, J. B. Dainton, F. Botterweck, R. M. Martin, S. Schiek, R. Marshall, P. Baranov, R. Bernet, F. Brasse, Dirk Krücker, Peter Schleper, H. P. Beck, Stephen Burke, J. Haack, R. J. Ellison, Günter Flügge, T. P. Yiou, P. I. P. Kalmus, P. E. Reimer, H. E. Roloff, K. Stephens, E. Evrard, Dusan Bruncko, V. Efremenko, Paul Richard Newman, Grzegorz Nowak, C. Jacobsson, T. Krämerkämper, E. Peppel, M. Jaffre, H. Krehbiel, J. E. Olsson, W. Bartel, H. B. Dreis, L. Goerlach, K. H. Hiller, R. C. W. Henderson, B. Naroska, F. Ferrarotto, E. M. Hanlon, H. Genzel, P. Verrecchia, A. Braemer, Leif J. Jönsson, C. Kiesling, G. G. Winter, F. Zomer, A. M. Goodall, A. De Roeck, Marc Besancon, S. Mikocki, Ch. Ley, A.S. Belousov, Wolfram Erdmann, A. J. Campbell, Richard E. Taylor, G. Buschhorn, Sergey Rusakov, F. W. Büsser, P. Truöl, W. Braunschweig, L. Del Buono, J. Garvey, R. Sell, S. Kazarian, J. Tutas, J. D. Burger, T. Greenshaw, V. Schröder, T. Ahmed, B. Delcourt, R. Prosi, C. Vallée, H. H. Kaufmann, Eckhard Elsen, J.P. Phillips, Peter Schacht, G. C. Lopez, U. Stösslein, R. D. Appuhn, P. Steffen, V. Andreev, A. Wagener, C. Leverenz, H. Lohmander, U. Siewert, M. Zimmer, Vincent Boudry, A. M. Fomenko, Jean-Francois Laporte, Wolfgang Lange, P. Van Esch, O. Hamon, U. Krüner-Marquis, H. Hufnagel, S. Aid, D. Feeken, U. Kathage, Claus Kleinwort, G. Villet, Pierre Marage, D. Zarbock, H. P. Wellisch, H. Ehrlichmann, Gregorio Bernardi, Max Weber, H. K. Nguyen, I. V. Gorelov, K. Müller, T. Kurča, T. Carli, H. Bergstein, Th. Naumann, R. Grässler, Ch. Coutures, W. Struczinski, Stephen Maxfield, J. Stiewe, C.D. Hilton, J.G. Contreras, Yves Sirois, A. Wegner, V. Brisson, G. Lindström, C. Gruber, E. Panaro, J. Kurzhöfer, S. Reinshagen, A. Courau, A. B. Clegg, R. Rylko, Andrew Mehta, H. Duhm, N. Gogitidze, V. Nagovizin, Anton Babaev, R. Eichler, J. P. Kubenka, J. Feltesse, C. Thiebaux, J. Strachota, M. Vecko, M. Fleischer, J. Lipinski, G. Franke, D. Mercer, G. W. Noyes, E. Gabathuler, E. Deffur, M. Arpagaus, J. Gayler, R. Starosta, A. Walther, U. Seehausen, J. Ebert, F. Sefkow, B. Schwab, S. Masson, Pavel Murin, H. Grässler, W. Zimmermann, M. Ibbotson, J. Baehr, M. David, E. Sanchez, Benno List, Barbara Clerbaux, Laurent Favart, C. Dollfus, M. Flieser, J. Stier, J. Marks, Y. Vazdik, R. Buchholz, David Milstead, P. A. Smirnov, F. Rouse, Ulrich Goerlach, Daniel Pitzl, M. Höppner, S. Prell, S. K. Kotelnikov, L. Hajduk, R. Kaschowitz, W. Hildesheim, Roland Horisberger, A. Valkárová, Martin Erdmann, S. Riess, A. Lindner, J. Janoth, U. Obrock, F. Niebergall, Didier Lacour, G. Pope, C. Schmidt, J. P. Sutton, Volker Blobel, C. Keuker, P. Di Nezza, P. Hill, J. Bán, F. Charles, M. F. Hess, P. Kostka, J. Turnau, M. Steenbock, B. Andrieu, B. Gonzalez-Pineiro, R. L. Lander, M. Korn, G. Weber, H. Meyer, U. Straumann, S. Kermiche, F. Linsel, J. Heatherington, D. Newton, P. Lanius, Markus Seidel, V. Tchernyshov, V. Korbel, H. Shooshtari, R. Maraček, W. von Schlippe, T. Merz, R. Nisius, J. R. Smith, R. Herma, Armen Vartapetian, E. Eisenhandler, A. Rostovtsev, S. Eichenberger, K. Rüter, C. Niebuhr, D. Goldner, Y. Soloviev, I. W. Walker, K. Rybicki, Christoph Grab, U. Bassler, P. Ribarics, R. Felst, N. Magnussen, N. Sahlmann, E. Schuhmann, P. Biddulph, M. A. Jabiol, C. A. Meyer, A. Gruber, Daniel Johnson, J. Duboc, B. Stella, G. Müller, G. Bertrand-Coremans, P. Goritchev, Carl R. Brune, M. Barth, L. Criegee, K. Gamerdinger, D. Neyret, T. Mavroidis, J. Formánek, M. Gebauer, J. Riedlberger, S. M. Robertson, A. Gellrich, F. Lamarche, Hermann Kolanoski, D. Clarke, John A Coughlan, Horst Oberlack, and G. Siegmon
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Photon, Meson, Scattering, Hadron, Physics::Optics, Elementary particle, HERA, Kinetic energy, Nuclear physics, High Energy Physics::Experiment, Rapidity, Nuclear Experiment
Abstract: Events with no hadronic energy flow in a large interval of pseudo-rapidity in the proton direction are observed in photon-proton interactions at an average centre of mass energy 〈√sγp〉 of 200 GeV These events are interpreted as photon diffractive dissociation. Evidence for hard scattering in photon diffractive dissociation is demonstrated using inclusive single particle spectra, thrust as a function of transverse energy, and the observation of jet production. The data can be described by a Monte Carlo calculation including hard photon-pomeron scattering.
Published: 1995

13. A measurement of the proton structure function <tex>F_{2}$</tex> (x, <tex>Q^{**}2)$</tex>

Author: H. U. Martyn, Matthias Klein, C. Niebuhr, Wolfram Erdmann, L. Criegee, T. Ahmed, M. Hppner, V. Andreev, D. Goldner, L. Grlich, R. Bernet, L. Jnsson, M. Colombo, H. E. Roloff, L. Del Buono, F W. Bsser, I. W. Walker, Murrough Landon, A. E. Wright, M. Kuhlen, K. Rybicki, G. Grindhammer, Yves Sirois, Paul Richard Newman, Grzegorz Nowak, G. Mller, C. Jacobsson, Christoph Grab, U. Seehausen, J. Kurzhfer, F. Botterweck, E. Snchez, P. Trul, H. Lohmander, G. Bertrand-Coremans, R. Kaschowitz, G. Franke, A. Wegner, a A. Akhundov, E. Panaro, W. Hildesheim, R. Eichler, J. P. Kubenka, G. W. Noyes, A. Walther, H. Itterbeck, P. Van Mechelen, J. V. Morris, S. Prell, H. Erlichmann, P. E. Reimer, W. Zimmermann, S. Riess, C. Cormack, E. M. Hanlon, O. Hamon, Armen Vartapetian, J. Baehr, V. Lubimov, T. Jansen, P. Verrecchia, Roland Horisberger, M. Nyberg-Werther, G. Heinzelmann, G. G. Winter, S. Willard, K. Daum, M. Forbush, A. Rostovtsev, R. J. Ellison, H. H. Kaufmann, Jan Hladky, I. Shevyakov, P. Steffen, P. Goritchev, T. R. Ebert, A. Droutskoi, C. Schmidt, H. Rick, N. Magnussen, J. P. Sutton, P. Di Nezza, M. Winde, P. Uelkes, L. Johnson, Ch. Ley, A. Schwind, N. Sahlmann, E. Mroczko, M. Gebauer, A. Fedotov, G. Knies, Eckhard Elsen, V. Nagovitsin, K. Gamerdinger, U. Kathage, E. Schuhmann, V. Chernyshov, M. Steenbock, H. Hufnagel, P. Hill, P. Robmann, J. Bán, H. Grssler, J. Khne, J. Duboc, D. Neyret, S. Schiek, M. Hampel, B. Kuznik, Ph. Huet, S. Kermiche, S. Aid, J. Buerger, C. Kiesling, Wolfgang Lange, A. Lindner, J. Janoth, D. Dllmann, C.D. Hilton, E. Malinovskii, J.G. Contreras, B. Stella, J. Gayler, S. Eichenberger, I. R. Kenyon, T. Krmerkmper, L. N. Shtarkov, Dave Sankey, J. Haack, V. Brisson, A. De Roeck, A. J. Campbell, Richard E. Taylor, Mikhail Danilov, K. Gabathuler, A. Buniatian, D. Wegener, D. Krcker, W.J. Haynes, J. Formnek, A. Wagener, R. Roosen, I. O. Skillicorn, D. Zarbock, H. B. Dreis, Ch. Pichler, H. P. Wellisch, Max Weber, M. A. Jabiol, T. P. Yiou, Martin Erdmann, F. Charles, J. Katzy, T. Khler, U. Obrock, S. Reinshagen, A. Panitch, C. Keuker, J. Martyniak, Carl R. Brune, M. Barth, R. Marshall, M. F. Hess, T. Carli, B. Fominykh, L. R. West, U. Bassler, M. W. Krasny, T. Kurča, M. Htte, P. Kostka, B. Naroska, G. D. Patel, A. Usik, R. Nahnhauer, Zhiqing Zhang, Benno List, H. Krehbiel, J. Turnau, K. Mller, Barbara Clerbaux, H. K. Nguyen, I. V. Gorelov, J. Zcek, H. Bergstein, Eckhart Fretwurst, M. Arpagaus, G. Siegmon, K. C. Hoeger, T.C. Nicholls, B. Schwab, David Schmidt, S. Levonian, A. Gellrich, J. E. Olsson, W. Bartel, G. Buschhorn, V. Efremenko, F. Lamarche, R. Grssler, P. Ribarics, H. Duhm, B. Andrieu, M. Wagener, V. Riech, R. Felst, R. Beyer, K. Flamm, E. Barrelet, David Cussans, S. Mani, E. A. De Wolf, Ch. Berger, F. Moreau, J. D. Dowell, Ch. Coutures, W. Struczinski, J. M. Foster, D. Feeken, W. Braunschweig, M. Savitsky, R. Sell, S. Kazarian, Hermann Kolanoski, D. Clarke, M. Ibbotson, A. Mavroidis, E. Gabathuler, C. Pascaud, M. Hapke, John A Coughlan, A. Lebedev, S. Egli, Horst Oberlack, G. Weber, U. Siewert, E. Deffur, P. Baranov, S. Mikocki, A. Jacholkowska, Peter Schleper, H. P. Beck, Stephen Burke, M. Zimmer, J. Feltesse, Vincent Boudry, Jean-Francois Laporte, P. I. P. Kalmus, M. Rietz, S. Valkr, D. Haidt, Laurent Favart, C. Dollfus, C. A. Meyer, Karlheinz Meier, K. Zuber, Marc Besancon, J. Riedlberger, U. Krner-Marquis, J. Cvach, A.S. Belousov, Sergey Rusakov, B. Gonzalez-Pineiro, G. Schmidt, A. Braemer, V. Blobel, S. M. Robertson, U. Stsslein, S. D. Kolya, Jean-Arcady Meyer, Eram Rizvi, A. Gruber, F. Rouse, M. David, Ulrich Goerlach, M. Vecko, R. Gerhards, Daniel Pitzl, C. Kleinwort, R. L. Lander, Frank Raupach, K. H. Hiller, Daniel Johnson, D. Mercer, I. Herynek, R. C. W. Henderson, E. Prez, N. Wulff, J. Tutas, S. Masson, R. Buchholz, M. Flieser, F. Niebergall, David Milstead, J. Stier, Y. Vazdik, P. Kasselmann, V.L. Hudgson, Stephen Maxfield, P. A. Smirnov, J. Stiewe, R. Prosi, A. Schning, J. Martens, U P. Krger, F. Kole, S. K. Kotelnikov, L. Hajduk, A. B. Clegg, R. Rylko, Andrew Mehta, N. Gogitidze, M. Fleischer, K. Johannsen, H. Kster, D. Lke, P. Murn, K. Rter, Peter Schacht, S. Tapprogge, W.D. Dau, J. B. Dainton, J. Lipinski, K. Stephens, E. Peppel, A. Valkrov, J. Spiekermann, Gregorio Bernardi, J. Ebert, R. Starosta, Anton Babaev, C. Thiebaux, J. Strachota, F. Sefkow, Peter Loch, R. D. Martin, Didier Lacour, G. Pope, J. Garvey, A. M. Fomenko, G. Villet, Pierre Marage, M. J. Burton, H. Spitzer, A. Courau, O. Dnger, Christophe Royon, Winston Ko, Guenter Eckerlin, Steve McMahon, V. Schrder, F. Linsel, G C. Lpez, J. Heatherington, G. Flgge, R. D. Appuhn, C. Gruber, G. Lindstrm, D. Kant, G. Rdel, Kerstin Borras, D. Newton, A. Semenov, Yu. Solovev, F. Brasse, P. Lanius, Markus Seidel, M. Korn, R. Nisius, U. Straumann, Thomas Naumann, V. Korbel, J. R. Smith, L. Buengener, E. Eisenhandler, R. Maraček, Fabian Zomer, G. Cozzika, F. Eisele, W. von Schlippe, Hannes Jung, Alexander Zhokin, T. Merz, C. Vallée, E. Evrard, S. Dagoret, J. Ferencei, V I. Shekelyan, K. Wacker, R. Steinberg, Dusan Bruncko, F. Ferrarotto, H. Genzel, T. Greenshaw, J.P. Phillips, P. Van Esch, J. Marks, B. Delcourt, C. Leverenz, K. Rosenbauer, M. Jaffré, G. Thompson, M. Oakden, H. Meyer, E. Wnsch, H. Henschel, H. J. Behrend, J.C. Bizot, M. Goldberg, H. Shooshtari, Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Diffraction, Nuclear and High Energy Physics, Range (particle radiation), Logarithm, Proton, 010308 nuclear & particles physics, Momentum transfer, Hadron, FOS: Physical sciences, HERA, 01 natural sciences, Measure (mathematics), High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Atomic physics, 010306 general physics
Abstract: A measurement of the proton structure function $F_{\!2}(x,Q^2)$ is reported for momentum transfer squared $Q^2$ between 4.5 $GeV^2$ and 1600 $GeV^2$ and for Bjorken $x$ between $1.8\cdot10^{-4}$ and 0.13 using data collected by the HERA experiment H1 in 1993. It is observed that $F_{\!2}$ increases significantly with decreasing $x$, confirming our previous measurement made with one tenth of the data available in this analysis. The $Q^2$ dependence is approximately logarithmic over the full kinematic range covered. The subsample of deep inelastic events with a large pseudo-rapidity gap in the hadronic energy flow close to the proton remnant is used to measure the "diffractive" contribution to $F_{\!2}$., 32 pages, ps, appended as compressed, uuencoded file
Published: 1995

14. Deep inelastic scattering events with a large rapidity gap at HERA

Author: F. Kole, H. P. Wellisch, M. Jaffre, J. E. Olsson, W. Bartel, J. Stiewe, F. W. Büsser, M. Vecko, B. Stella, I. O. Skillicorn, R. Maraček, W. Braunschweig, Andrew Mehta, N. Gogitidze, R. Sell, S. Kazarian, P. Biddulph, U. Siewert, C. A. Meyer, H. U. Martyn, V. Brisson, H. Grässler, M. Zimmer, S. Tapprogge, L. Criegee, Paul Richard Newman, C. Jacobsson, Michael Seidel, K. C. Hoeger, J. V. Morris, G. Schmidt, Peter Robmann, Carl R. Brune, M. Barth, J-P. Meyer, P. Goritchev, A. Lindner, J. Ebert, A. Walther, S. Eichenberger, A. M. Goodall, V. Riech, D. Milstead, J. Žáček, S. Rusakov, J. Formánek, Murrough Landon, J. Bürger, W. von Schlippe, G. Knies, H. Itterbeck, P. Van Mechelen, Laurent Favart, T. Merz, C. Dollfus, S. Schiek, E. Peppel, K. Stephens, M. Forbush, L. Goerlich, K. Rosenbauer, D. Neyret, T. Ahmed, A. Schwind, P. Ribarics, J. Baehr, M. Colombo, M. Savitsky, C. Niebuhr, M. Hapke, R. C. W. Henderson, J. R. Smith, J. Haack, M. Ibbotson, H. B. Dreis, J. Martyniak, M. W. Krasny, D. Lüke, E. Eisenhandler, Ulrich Goerlach, S. Egli, J. G. Contreras, E. Malinovski, M. Kuhlen, A. Lebedev, G. Thompson, B. Schwab, U. Kathage, K. Zuber, J. Cvach, U. Bassler, Y. Soloviev, J. Heaterington, B. Fominykh, A. Gellrich, K. Johannsen, O. Dünger, E. Perez, M. Gebauer, V. Hedberg, D. Goldner, D. Düllmann, M. Rietz, D. Haidt, D. Feeken, M. Weber, R. Horisberger, H. Bergstein, S. D. Kolya, Th. Naumann, N. Wulff, Th. Wolff, C. Royon, F. Zomer, F. Botterweck, E. Gabathuler, T.P. Yiou, S. J. McMahon, I. Sheviakov, R. Kaschowitz, Barbara Clerbaux, A. Buniatian, H. Krehbiel, S. Valkár, A. E. Wright, S. Riess, H. Duhm, G. Heinzelmann, H. J. Behrend, J.C. Bizot, M. Goldberg, D. Wegener, W.J. Haynes, S. J. Maxfield, E. Evrard, S. Prell, R. Roosen, R. Rylko, M. Fleischer, W. Hildesheim, P. Kasselmann, I. R. Kenyon, R. Gerhards, P. E. Reimer, K. Gamerdinger, Christoph Grab, R. Felst, J. Kurzhöfer, D. Schmidt, Wolfgang Lange, B. Naroska, Hermann Kolanoski, Winston Ko, D. Clarke, C. Pascaud, John A Coughlan, J. Hladký, P. Hill, J. Bán, H. Küster, L. R. West, U. Krüner-Marquis, T. Köhler, Guenter Eckerlin, C. Vallée, K. Gabathuler, S. Aid, P. Di Nezza, H. Ehrlichmann, H. Spitzer, J. M. Foster, Yves Sirois, S. Willard, G. Lindström, D. Kant, Ch. Ley, V. Boudry, Anton Babaev, R. J. Ellison, A. Valkárová, W. Zimmermann, A. Wagener, J. Feltesse, P. Baranov, J. Lipinski, S. Kermiche, Alan Campbell, G. G. Winter, M. F. Hess, G. Grindhammer, P. Steffen, Peter Schleper, E. M. Hanlon, M. Winde, P. Uelkes, V. Efremenko, S. Mikocki, J. Riedlberger, S. M. Robertson, R. Nahnhauer, E. Barrelet, L. Johnson, David Cussans, E. Wünsch, L. N. Shtarkov, M. A. Jabiol, A. Braemer, Dave Sankey, G. Franke, A. Schöning, R. D. Appuhn, P. Loch, N. Magnussen, J. Turnau, H. K. Nguyen, I. V. Gorelov, R. Grässler, Ch. Coutures, W. Struczinski, A. Panitch, G. Nowak, S. Reinshagen, C. Kiesling, E. A. De Wolf, Ch. Berger, L. Büngener, U. Krüger, Marc Besancon, A.S. Belousov, E. Sanchez, J. Janoth, A. Gruber, N. Sahlmann, G. D. Patel, H. Meyer, Max Klein, V. Schröder, D.P. Johnson, H. Shooshtari, S. Masson, T. Carli, L. Jönsson, R. Buchholz, P. A. Smirnov, K. Meier, J. Gayler, F. R. Rouse, R. Nisius, R. Bernet, L. Del Buono, J. Strachota, Vladimir Andreev, I. Herynek, S. Dagoret, A. Usik, S. Levonian, J. F. Laporte, P. Truöl, F. Lamarche, C. Schmidt, J. P. Sutton, M. Steenbock, B. Andrieu, A. B. Clegg, Volker Blobel, H. E. Roloff, C. Gruber, M. Arpagaus, K. Rybicki, Richard Lander, K. Rüter, C. Keuker, R. Marshall, Z. Zhang, Dirk Krücker, J. Ferencei, V I. Shekelyan, K. Flamm, I. Tichomirov, P. Murín, H. Hufnagel, S. Mani, H. P. Beck, O. Hamon, Kerstin Borras, R. Starosta, A. Semenov, H. H. Kaufmann, Stephen Burke, M. Höppner, C.D. Hilton, J. Duboc, P. Verrecchia, U. Seehausen, D. Lacour, R. Herma, K. Wacker, R. Steinberg, B. Gonzalez-Pineiro, K. Müller, F. Brasse, H. Lohmander, J. Garvey, J. P. Kubenka, Martin Erdmann, A. M. Fomenko, U. Obrock, F. Niebergall, V. Korbel, Dusan Bruncko, D. Mercer, F. Ferrarotto, H. Genzel, P. Van Esch, E. Elsen, A. Rostovtsev, Claus Kleinwort, G. Bertrand-Coremans, A. Wegner, F. Sefkow, P. Lanius, E. Panaro, V. Nagovizin, R. Eichler, G. Müller, C. Thiebaux, G. W. Noyes, Daniel Pitzl, E. Deffur, G. C. Lopez, P. Kostka, E. Fretwurst, B. List, T. R. Ebert, F. Raupach, A. Fedotov, Günter Flügge, A. De Roeck, F. Charles, H. Henschel, T. Kurča, P. Schacht, J. Stier, J. Marks, Y. Vazdik, S. K. Kotelnikov, M. Nyberg-Werther, L. Hajduk, B. Delcourt, T. Mavroidis, U. Stösslein, C. Leverenz, G. Cozzika, F. Eisele, J.P. Phillips, Hannes Jung, R. D. Martin, G. Pope, I. W. Walker, E. Schuhmann, H. Oberlack, G. Villet, Pierre Marage, M. Korn, A. Courau, G. Weber, U. Straumann, R. E. Taylor, G. Bernardi, G. Buschhorn, F. Linsel, Tim Greenshaw, M. Flieser, D. Newton, V. Tchernyshov, K. H. Hiller, J. Tutas, R. Prosi, G. Siegmon, F. Moreau, J. D. Dowell, A. Jacholkowska, A. Vartapetian, T. Jansen, P. I. P. Kalmus, G. Rädel, M. Hampel, B. Kuznik, Ph. Huet, Ch. Pichler, and J. Martens
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Meson, High Energy Physics::Phenomenology, Parton, Vector meson dominance, HERA, Inelastic scattering, Deep inelastic scattering, Nuclear physics, High Energy Physics::Experiment, Rapidity, Vector meson, Nuclear Experiment
Abstract: Evidence is presented using data taken with the H1 detector at HERA for a class of deep inelastic electron-proton scattering (DIS) events (5 < Q2 < 120 GeV2) at low Bjorken-x (10−4 < x < 10−2) which have almost no hadronic energy flow in a large interval of pseudo-rapidity around the proton remnant direction and which cannot be attributed to our present understanding of DIS and fluctuations in final state hadronic fragmentation. From an integrated luminosity of 273 nb−1, 734 events, that is about 5% of the total DIS sample, have no energy deposition greater than 400 MeV forward of laboratory pseudo-rapidity ηmax = 1.8 up to the largest measurable pseudo-rapidity of about 3.65. Evidence that about 10% of observed rapidity gap events are exclusive vector meson electroproduction is presented. Good descriptions of the data are obtained using models based either on a vector meson dominance like picture, which includes a large fraction of inelastic virtual photon dissociation, or on deep inelastic electron-pomeron scattering in which the partonic sub-structure of the latter is resolved.
Published: 1994

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14 results on '"C.D. Hilton"'

1. The H1 detector at HERA

2. Search for Excited Fermions with the H1 Detector

3. Low Q$^{2}$ Jet Production at HERA and Virtual Photon Structure

4. The tracking calorimeter and muon detectors of the H1 experiment at Hera

5. Measurement of Charged Particle Transverse Momentum Spectra in Deep Inelastic Scattering

6. A search for leptoquarks at HERA

7. Leptoquarks and Compositeness Scales from a Contact Interaction Analysis of Deep Inelastic $e^\pm \, p$ Scattering at HERA

8. Inclusive parton cross sections in photoproduction and photon structure

9. Determination of the strong coupling constant from jet rates in deep inelastic scattering

10. First measurement of the deep-inelastic structure of proton diffraction

11. A study of the fragmentation of quarks in $e^-p$ collisions at Hera

12. Observation of hard processes in rapidity gap events in γp interactions at HERA

13. A measurement of the proton structure function <tex>F_{2}$</tex> (x, <tex>Q^{**}2)$</tex>

14. Deep inelastic scattering events with a large rapidity gap at HERA

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