Author: "Ayyaz, I." - Searchworks@Jio Institute Digital Library Search Results

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196 results on '"Ayyaz, I."'

1. Measurement of dijet cross-sections in low Q(2) ep collisions and the extraction of an effective parton density for the virtual photon

Author: Adloff, C, Andreev, V, Andrieu, B, Arkadov, V, Astvatsatourov, A, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, T, Bassler, U, Bate, P, Beglarian, A, Behnke, O, Behrend, HJ, Beier, C, Belousov, A, Berger, C, Bernardi, G, Berndt, T, Bertrand-Coremans, G, Biddulph, P, Bizot, JC, Boudry, V, Braunschweig, W, Brisson, V, Brown, DP, Bruckner, W, Bruel, P, Bruncko, D, Burger, J, Busser, FW, Buniatian, A, Burke, S, Burrage, A, Buschhorn, G, Calvet, D, Campbell, AJ, Carli, T, Chabert, E, Charlet, M, Chyla, J, Clarke, D, Clerbaux, B, Contreras, JG, Cormack, C, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, David, M, Davidsson, M, De Roeck, A, De Wolf, EA, Delcourt, B, Demirchyan, R, Diaconu, C, Dirkmann, M, Dixon, P, Dlugosz, W, Donovan, KT, Dowell, JD, Droutskoi, A, Ebert, J, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Elsen, E, Enzenberger, M, Erdmann, M, Fahr, AB, Faulkner, PJW, Favart, L, Fedotov, A, Felst, R, Feltesse, J, Ferencei, J, Ferrarotto, F, Fleischer, M, Flugge, G, Fomenko, A, Formanek, J, Foster, JM, Franke, G, Gabathuler, E, Gabathuler, K, Gaede, F, Garvey, J, Gassner, J, Gayler, J, and Gerhards, R
Subjects: Nuclear & Particles Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Published: 2000

2. Diffractive dijet production at HERA

Author: Adloff, C., Anderson, M., Andreev, V., Andrieu, B., Arkadov, V., Arndt, C., Ayyaz, I., Babaev, A., Bähr, J., Ban, J., Baranov, P., Barrelet, E., Barschke, R., Bartel, W., Bassler, U., Bate, P., Beck, M., Beglarian, A., Behnke, O., Behrend, H. -J., Beier, C., Belousov, A., Berger, Ch., Bernardi, G., Bertrand-Coremans, G., Biddulph, P., Bizot, J. C., Boudry, V., Braemer, A., Braunschweig, W., Brisson, V., Brown, D. P., Brückner, W., Bruel, P., Bruncko, D., Bürger, J., Büsser, F. W., Buniatian, A., Burke, S., Buschhorn, G., Calvet, D., Campbell, A. J., Carli, T., Chabert, E., Charlet, M., Clarke, D., Clerbaux, B., Cocks, S., Contreras, J. G., Cormack, C., Coughlan, J. A., Cousinou, M. -C., Cox, B. E., Cozzika, G., Cvach, J., Dainton, J. B., Dau, W. D., Daum, K., David, M., Davidsson, M., De Roeck, A., De Wolf, E. A., Delcourt, B., Demirchyan, R., Diaconu, C., Dirkmann, M., Dixon, P., Dlugosz, W., Donovan, K. T., Dowell, J. D., Droutskoi, A., Ebert, J., Eckerlin, G., Eckstein, D., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Elsen, E., Enzenberger, M., Erdmann, M., Fahr, A. B., Favart, L., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Ferrarotto, F., Fleischer, M., Flügge, G., Fomenko, A., Formánek, J., Foster, J. M., Franke, G., Gabathuler, E., Gabathuler, K., Gaede, F., Garvey, J., Gayler, J., Gebauer, M., Gerhards, R., Ghazaryan, S., Glazov, A., Goerlich, L., Gogitidze, N., Goldberg, M., Gorelov, I., Grab, C., Grässler, H., Greenshaw, T., Griffiths, R. K., Grindhammer, G., Gruber, C., Hadig, T., Haidt, D., Hajduk, L., Haller, T., Hampe, M., Haustein, V., Haynes, W. J., Heinemann, B., Heinzelmann, G., Henderson, R. C. W., Hengstmann, S., Henschel, H., Heremans, R., Herynek, I., Hewitt, K., Hiller, K. H., Hilton, C. D., Hladky, J., Hoffmann, D., Holtom, T., Horisberger, R., Hudgson, V. L., Hurling, S., Ibbotson, M., İşsever, Ç., Itterbeck, H., Jacquet, M., Jaffre, M., Jansen, D. M., Jönsson, L., Johnson, D. P., Jung, H., Kaestli, H. C., Kander, M., Kant, D., Karlsson, M., Kathage, U., Katzy, J., Kaufmann, O., Kausch, M., Kenyon, I. R., Kermiche, S., Keuker, C., Riesling, C., Klein, M., Kleinwort, C., Knies, G., Könne, J. H., Kolanoski, H., Kolya, S. D., Korbel, V., Kostka, P., Kotelnikov, S. K., Krämerkämper, T., Krasny, M. W., Krehbiel, H., Krücker, D., Küpper, A., Küster, H., Kuhlen, M., Kurča, T., Laforge, B., Lahmann, R., Landon, M. P. J., Lange, W., Langenegger, U., Lebedev, A., Lehner, F., Lemaitre, V., Levonian, S., Lindstroem, M., List, B., Lobo, G., Lubimov, V., Luke, D., Lytkin, L., Magnussen, N., Mahlke-Krüger, H., Malinovski, E., Maraček, R., Marage, P., Marks, J., Marshall, R., Martin, G., Martyn, H. -U., Martyniak, J., Maxfield, S. J., McMahon, S. J., McMahon, T. R., Mehta, A., Meier, K., Merkel, P., Metlica, F., Meyer, A., Meyer, A., Meyer, H., Meyer, J., Meyer, P. -O., Mikocki, S., Milstead, D., Moeck, J., Mohr, R., Mohrdieck, S., Moreau, F., Morris, J. V., Mroczko, E., Müller, D., Müller, K., Murín, P., Nagovizin, V., Naroska, B., Naumann, Th., Négri, I., Newman, P. R., Newton, D., Nguyen, H. K., Nicholls, T. C., Niebergall, F., Niebuhr, C., Niedzballa, Ch., Niggli, H., Nix, O., Nowak, G., Nunnemann, T., Oberlack, H., Olsson, J. E., Ozerov, D., Palmen, P., Panaro, E., Pascaud, C., Passaggio, S., Patel, G. D., Pawletta, H., Peppel, E., Perez, E., Phillips, J. P., Pieuchot, A., Pitzl, D., Pösch, R., Pope, G., Povh, B., Rabbertz, K., Reimer, P., Reisert, B., Rick, H., Riess, S., Rizvi, E., Robmann, P., Roosen, R., Rosenbauer, K., Rostovtsev, A., Rouse, F., Royon, C., Rusakov, S., Rybicki, K., Sankey, D. P. C., Schacht, P., Scheins, J., Schiek, S., Schleif, S., Schleper, P., Schmidt, D., Schmidt, G., Schoeffe, L., Schröder, V., Schultz-Coulon, H. -C., Schwab, B., Sefkow, F., Semenov, A., Sheelyan, V., Sheviakov, I., Shtarkov, L. N., Siegmon, G., Sirois, Y., Sloan, T., Smirnov, P., Smith, M., Solochenko, V., Soloviev, Y., Specka, A., Spiekermann, J., Spitzer, H., Squinabol, F., Steffen, P., Steinberg, R., Steinhart, J., Stella, B., Stellberger, A., Stiewe, J., Straumann, U., Struczinski, W., Sutton, J. P., Swart, M., Tapprogge, S., Taševský, M., Tchernyshov, V., Tchetchelnitski, S., Theissen, J., Thompson, G., Thompson, P. D., Tobien, N., Todenhagen, R., Truöl, P., Tsipolitis, G., Turnau, J., Tzamariudaki, E., Udluft, S., Usik, A., Valkár, S., Valkárová, A., Vallée, C., Van Esch, P., Van Mechelen, P., Vazdik, Y., Villet, G., Wacker, K., Wallny, R., Walter, T., Waugh, B., Weber, G., Weber, M., Wegener, D., Wegner, A., Wengler, T., Werner, M., West, L. R., Wiesand, S., Wilksen, T., Willard, S., Winde, M., Winter, G. -G., Wittek, C., Wittmann, E., Wobisch, M., Wollatz, H., Wünsch, E., Žáček, J., Zálešâk, J., Zhang, Z., Zhokin, A., Zini, P., Zomer, F., Zsembery, J., zurNedden, M., and H1 Collaboration
Published: 1999
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3. Measurement of the inclusive di-jet cross section in photoproduction and determination of an effective parton distribution in the photon

Author: Adloff, C., Aid, S., Anderson, M., Andreev, V., Andrieu, B., Arkadov, V., Arndt, C., Ayyaz, I., Babaev, A., Bähr, J., Bán, J., Baranov, P., Barrelet, E., Barschke, R., Bartel, W., Bassler, U., Beck, M., Behrend, H. -J., Beier, C., Belousov, A., Bergen, Ch., Bernardi, G., Bertrand-Coremans, G., Beyer, R., Biddulph, P., Bizot, J. C., Borras, K., Botterweck, F., Boudry, V., Bourov, S., Braemer, A., Braunschweig, W., Brisson, V., Brown, D. P., Brückner, W., Bruel, P., Bruncko, D., Brune, C., Bürger, J., Büsser, F. W., Buniatian, A., Burke, S., Buschhorn, G., Calvet, D., Campbell, A. J., Carli, T., Charlet, M., Clarke, D., Clerbaux, B., Cocks, S., Contreras, J. G., Cormack, C., Coughlan, J. A., Cousinou, M. -C., Cox, B. E., Cozzika, G., Cussans, D. G., Cvach, J., Dagoret, S., Dainton, J. B., Dan, W. D., Daum, K., David, M., Davis, C. L., De Roeck, A., De Wolf, E. A., Delcourt, B., Dirkmann, M., Dixon, P., Dlugosz, W., Donovan, K. T., Dowell, J. D., Droutskoi, A., Ebert, J., Ebert, T. R., Eckerlin, G., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Elsen, E., Erdmann, M., Fahr, A. B., Favart, L., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Ferrarotto, F., Flamm, K., Fleischer, M., Flieser, M., Flügge, G., Fomenko, A., Formánek, J., Foster, J. M., Franke, G., Gabathuler, E., Gabathuler, K., Gaede, F., Garvey, J., Gayler, J., Gebauer, M., Gerhards, R., Glazov, A., Goerlich, L., Gogitidze, N., Goldberg, M., Gonzalez-Pineiro, B., Gorelov, I., Grab, C., Grässler, H., Greenshaw, T., Griffiths, R. K., Grindhammer, G., Gruber, A., Gruber, C., Hadig, T., Haidt, D., Hajduk, L., Haller, T., Hampell, M., Haynes, W. J., Heinemann, B., Heinzelmann, G., Henderson, R. C. W., Hengstmann, S., Henschel, H., Herynek, I., Hess, M. F., Hewitt, K., Hiller, K. H., Hilton, C. D., Hladký, J., Höppner, M., Hoffmann, D., Holtom, T., Horisberger, R., Hudgson, V. L., Hütte, M., Ibbotson, M., Işsever, Ç., Itterbeck, H., Jacquet, M., Jaffre, M., Janoth, J., Jansen, D. M., Jönsson, L., Johnson, D. P., Jung, H., Kalmus, P. I. P., Kander, M., Kant, D., Kathage, U., Katzy, J., Kaufmann, H. H., Kaufmann, O., Kausch, M., Kazarian, S., Kenyon, I. R., Kermiche, S., Keuker, C., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Köhne, J. H., Kolanoski, H., Kolya, S. D., Korbel, V., Kostka, P., Kotelnikov, S. K., Krämerkämper, T., Krasny, M. W., Krehbiel, H., Krücker, D., Küpper, A., Küster, H., Kuhlen, M., Kurça, T., Laforge, B., Lahmann, R., Landon, M. P. J., Lange, W., Langenegger, U., Lebedev, A., Lehner, F., Lemaitre, V., Levonian, S., Lindstroem, M., Lipinski, J., List, B., Lobo, G., Lopez, G. C., Lubimov, V., Lüke, D., Lytkin, L., Magnussen, N., Mahlke-Krüger, H., Malinovski, E., Maraček, R., Marage, P., Marks, J., Marshall, R., Martens, J., Martin, G., Martin, R., Martyn, H. -U., Martyniak, J., Mavroidis, T., Maxfield, S. J., McMahon, S. J., Mehta, A., Meier, K., Merkel, P., Metlica, F., Meyer, A., Meyer, A., Meyer, H., Meyer, J., Meyer, P. -O., Migliori, A., Mikocki, S., Milstead, D., Moeck, J., Moreau, F., Morris, J. V., Mroczko, E., Müller, D., Müller, K., Murín, P., Nagovizin, V., Nahnhauer, R., Naroska, B., Naumann, Th., Négri, I., Newman, P. R., Newton, D., Nguyen, H. K., Nicholls, T. C., Niebergall, F., Niebuhr, C., Niedzballa, Ch., Niggli, H., Nowak, G., Nunnemann, T., Oberlack, H., Olsson, J. E., Ozerov, D., Palmen, P., Panaro, E., Panitch, A., Pascaud, C., Passaggio, S., Patel, G. D., Pawletta, H., Peppel, E., Perez, E., Phillips, J. P., Pieuchot, A., PitZl, D., Pöschl, R., Pope, G., Povh, B., Rabbertz, K., Reimer, P., Rick, H., Riess, S., Rizvi, E., Robmann, P., Roosen, R., Rosenbauer, K., Rostovtsev, A., Rouse, F., Royon, C., Miter, K., Rusakov, S., Rybicki, K., Sankey, D. P. C., Schacht, P., Scheins, J., Schiek, S., Schleif, S., Schleper, P., von Schlippe, W., Schmidt, D., Schmidt, G., Schoeffel, L., Schöning, A., Schröder, V., Schuhmann, E., Schultz-Coulon, H. -C., Schwab, B., Sefkow, F., Semenov, A., Shekelyan, V., Sheviakov, I., Shtarkov, L. N., Siegmon, G., Siewert, U., Sirois, Y., Skillicorn, I. O., Sloan, T., Smirnov, P., Smith, M., Solochenko, V., Soloviev, Y., Specka, A., Spiekermann, J., Spielman, S., Spitzer, H., Squinabol, F., Steffen, P., Steinberg, R., Steinhart, J., Stella, B., Stellberger, A., Stiewe, J., Stolze, K., Straumann, U., Struczinski, W., Sutton, J. P., Swart, M., Tapprogge, S., Taševský, M., Tchernyshov, V., Tchetchelnitski, S., Theissen, J., Thompson, G., Thompson, P. D., Tobien, N., Todenhagen, R., Truöl, P., Tsipolitis, G., Turnau, J., Tzamariudaki, E., Uelkes, P., Usik, A., Valkár, S., Valkárová, A., Vallée, C., Van Esch, P., Van Mechelen, P., Vandenplas, D., Vazdik, Y., Verrecchia, P., Villet, G., Wacker, K., Wagener, A., Wagener, M., Wallny, R., Walter, T., Waugh, B., Weber, G., Weber, M., and H1 Collaboration
Published: 1998
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4. Diffraction dissociation in photoproduction at HERA

Author: Adloff, C., Aid, S., Anderson, M., Andreev, V., Andrieu, B., Arkadov, V., Arndt, C., Ayyaz, I., Babaev, A., Bähr, J., Bán, J., Ban, Y., Baranov, P., Barrelet, E., Barschke, R., Bartel, W., Bassler, U., Beck, H. P., Beck, M., Behrend, H. J., Belousov, A., Berger, Ch., Bernardi, G., Bertrand-Coremans, G., Besançon, M., Beyer, R., Biddulph, P., Bispham, P., Bizot, J. C., Borras, K., Botterweck, F., Boudry, V., Braemer, A., Braunschweig, W., Brisson, V., Brückner, W., Bruel, P., Bruncko, D., Brune, C., Buchholz, R., Büngener, L., Bürger, J., Büsser, F. W., Buniatian, A., Burke, S., Burton, M. J., Calvet, D., Campbell, A. J., Carli, T., Charlet, M., Clarke, D., Clerbaux, B., Cocks, S., Contreras, J. G., Cormack, C., Coughlan, J. A., Courau, A., Cousinou, M. C., Cozzika, G., Criegee, L., Cussans, D. G., Cvach, J., Dagoret, S., Dainton, J. B., Dau, W. D., Daum, K., David, M., Davis, C. L., De Roeck, A., De Wolf, E. A., Delcourt, B., Dirkmann, M., Dixon, P., Dlugosz, W., Dollfus, C., Donovan, K. T., Dowell, J. D., Dreis, H. B., Droutskoi, A., Dünger, O., Duhm, H., Ebert, J., Ebert, T. R., Eckerlin, G., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Elsen, E., Erdmann, M., Erdmann, W., Fahr, A. B., Favart, L., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Ferrarotto, F., Flamm, K., Fleischer, M., Flieser, M., Flügge, G., Fomenko, A., Formánek, J., Foster, J. M., Franke, G., Fretwurst, E., Gabathuler, E., Gabathuler, K., Gaede, F., Garvey, J., Gayler, J., Gebauer, M., Genzel, H., Gerhards, R., Glazov, A., Goerlich, L., Gogitidze, N., Goldberg, M., Goldner, D., Golec-Biernat, K., Gonzalez-Pineiro, B., Gorelov, I., Grab, C., Grässler, H., Greenshaw, T., Griffiths, R. K., Grindhammer, G., Gruber, A., Gruber, C., Hadig, T., Haidt, D., Hajduk, L., Haller, T., Hampel, M., Haynes, W. J., Heinemann, B., Heinzelmann, G., Henderson, R. C. W., Henschel, H., Herynek, I., Hess, M. F., Hewitt, K., Hildesheim, W., Hiller, K. H., Hilton, C. D., Hladký, J., Höppner, M., Hoffmann, D., Holtom, T., Horisberger, R., Hudgson, V. L., Hütte, M., Ibbotson, M., Issever, C., Itterbeck, H., Jacholkowska, A., Jacobsson, C., Jacquet, M., Jaffre, M., Janoth, J., Jansen, D. M., Jansen, T., Jönsson, L., Johnson, D. P., Jung, H., Kalmus, P. I. P., Kander, M., Kant, D., Kaschowitz, R., Kathage, U., Katzy, J., Kaufmann, H. H., Kaufmann, O., Kausch, M., Kazarian, S., Kenyon, I. R., Kermiche, S., Keuker, C., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Köhler, T., Köhne, J. H., Kolanoski, H., Kolya, S. D., Korbel, V., Kostka, P., Kotelnikov, S. K., Krämerkämper, T., Krasny, M. W., Krehbiel, H., Krücker, D., Küster, H., Kuhlen, M., Kurča, T., Kurzhöfer, J., Laforge, B., Landon, M. P. J., Lange, W., Langenegger, U., Lebedev, A., Lehner, F., Lemaitre, V., Levonian, S., Lindström, G., Lindstroem, M., Linsel, F., Lipinski, J., List, B., Lobo, G., Loch, P., Lomas, J. W., Lopez, G. C., Lubimov, V., Lüke, D., Lytkin, L., Magnussen, N., Malinovski, E., Maraček, R., Marage, P., Marks, J., Marshall, R., Martens, J., Martin, G., Martin, R., Martyn, H. U., Martyniak, J., Mavroidis, T., Maxfield, S. J., McMahon, S. J., Mehta, A., Meier, K., Merkel, P., Metlica, F., Meyer, A., Meyer, A., Meyer, H., Meyer, J., Meyer, P. O., Migliori, A., Mikocki, S., Milstead, D., Moeck, J., Moreau, F., Morris, J. V., Mroczko, E., Müller, D., Müller, G., Müller, K., Murín, P., Nagovizin, V., Nahnhauer, R., Naroska, B., Naumann, Th., Négri, I., Newman, P. R., Newton, D., Nguyen, H. K., Nicholls, T. C., Niebergall, F., Niebuhr, C., Niedzballa, Ch., Niggli, H., Nowak, G., Nunnemann, T., Nyberg-Werther, M., Oberlack, H., Olsson, J. E., Ozerov, D., Palmen, P., Panaro, E., Panitch, A., Pascaud, C., Passaggio, S., Patel, G. D., Pawletta, H., Peppel, E., Perez, E., Phillips, J. P., Pieuchot, A., Pitzl, D., Pöschl, R., Pope, G., Povh, B., Prell, S., Rabbertz, K., Rädel, G., Reimer, P., Rick, H., Riess, S., Rizvi, E., Robmann, P., Roosen, R., Rosenbauer, K., Rostovtsev, A., Rouse, F., Royon, C., Rüter, K., Rusakov, S., Rybicki, K., Sankey, D. P. C., Schacht, P., Schiek, S., Schleif, S., Schleper, P., von Schlippe, W., Schmidt, D., Schmidt, G., Schoeffel, L., Schöning, A., Schröder, V., Schuhmann, E., Schwab, B., Sefkow, F., Semenov, A., Shekelyan, V., Sheviakov, I., Shtarkov, L. N., Siegmon, G., Siewert, U., Sirois, Y., Skillicorn, I. O., Sloan, T., Smirnov, P., Smith, M., Solochenko, V., Soloviev, Y., Specka, A., Spiekermann, J., Spielman, S., Spitzer, H., Squinabol, F., Steffen, P., Steinberg, R., Steiner, H., Steinhart, J., Stella, B., Stellberger, A., Stier, J., Stiewe, J., Stößlein, U., Stolze, K., Straumann, U., Struczinski, W., Sutton, J. P., Tapprogge, S., Taševský, M., Tchernyshov, V., Tchetchelnitski, S., Theissen, J., Thiebaux, C., Thompson, G., Tobien, N., Todenhagen, R., Truöl, P., Tsipolitis, G., Turnau, J., Tzamariudaki, E., Uelkes, P., Usik, A., Valkár, S., Valkárová, A., Vallée, C., Van Esch, P., Van Mechelen, P., Vandenplas, D., Vazdik, Y., Verrecchia, P., Villet, G., Wacker, K., Wagener, A., Wagener, M., Waugh, B., Weber, G., Weber, M., Wegener, D., Wegner, A., Wengler, T., Werner, M., West, L. R., Wilksen, T., Willard, S., Winde, M., Winter, G. G., Wittek, C., Wobisch, M., Wollatz, H., Wünsch, E., Záček, J., Zarbock, D., Zhang, Z., Zhokin, A., Zini, P., Zomer, F., Zsembery, J., Zuber, K., zurNedden, M., and H1 Collaboration
Published: 1997
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5. Observation of events at very high Q2 in ep collisions at HERA

Author: Adloff, C., Aid, S., Anderson, M., Andreev, V., Andrieu, B., Arkadov, V., Arndt, C., Ayyaz, I., Babaev, A., Bähr, J., Bán, J., Ban, Y., Baranov, P., Barrelet, E., Barschke, R., Bartel, W., Bassler, U., Beck, H. P., Beck, M., Behrend, H. J., Belousov, A., Berger, Ch., Bernardi, G., Bertrand-Coremans, G., Beyer, R., Biddulph, P., Bispham, P., Bizot, J. C., Borras, K., Botterweck, F., Boudry, V., Bourov, S., Braemer, A., Braunschweig, W., Brisson, V., Brückner, W., Bruel, P., Bruncko, D., Brune, C., Buchholz, R., Büngener, L., Bürger, J., Büsser, F. W., Buniatian, A., Burke, S., Buschhorn, G., Calvet, D., Campbell, A. J., Carli, T., Charlet, M., Clarke, D., Clerbaux, B., Cocks, S., Contreras, J. G., Cormack, C., Coughlan, J. A., Courau, A., Cousinou, M. C., Cox, B. D., Cozzika, G., Criegee, L., Cussans, D. G., Cvach, J., Dagoret, S., Dainton, J. B., Dau, W. D., Daum, K., David, M., Davis, C. L., De Roeck, A., De Wolf, E. A., Delcourt, B., Dirkmann, M., Dixon, P., Dlugosz, W., Dollfus, C., Donovan, K. T., Dowell, J. D., Dreis, H. B., Droutskoi, A., Dünger, O., Ebert, J., Ebert, T. R., Eckerlin, G., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Elsen, E., Erdmann, M., Fahr, A. B., Favart, L., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Ferrarotto, F., Flamm, K., Fleischer, M., Flieser, M., Flügge, G., Fomenko, A., Formánek, J., Foster, J. M., Franke, G., Fretwurst, E., Gabathuler, E., Gabathuler, K., Gaede, F., Garvey, J., Gayler, J., Gebauer, M., Genzel, H., Gerhards, R., Glazov, A., Goerlich, L., Gogitidze, N., Goldberg, M., Goldner, D., Golec-Biernat, K., Gonzalez-Pineiro, B., Gorelov, I., Grab, C., Grässler, H., Greenshaw, T., Griffiths, R. K., Grindhammer, G., Gruber, A., Gruber, C., Hadig, T., Haidt, D., Hajduk, L., Haller, T., Hampel, M., Haynes, W. J., Heinemann, B., Heinzelmann, G., Henderson, R. C. W., Henschel, H., Herynek, I., Hess, M. F., Hewitt, K., Hiller, K. H., Hilton, C. D., Hladký, J., Höppner, M., Hoffmann, D., Holtom, T., Horisberger, R., Hudgson, V. L., Hütte, M., Ibbotson, M., Issever, C., Itterbeck, H., Jacholkowska, A., Jacobsson, C., Jacquet, M., Jaffre, M., Janoth, J., Jansen, D. M., Jansen, T., Jönsson, L., Johnson, D. P., Jung, H., Kalmus, P. I. P., Kander, M., Kant, D., Kaschowitz, R., Kathage, U., Katzy, J., Kaufmann, H. H., Kaufmann, O., Kausch, M., Kazarian, S., Kenyon, I. R., Kermiche, S., Keuker, C., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Köhler, T., Köhne, J. H., Kolanoski, H., Kolya, S. D., Korbel, V., Kostka, P., Kotelnikov, S. K., Krämerkämper, T., Krasny, M. W., Krehbiel, H., Krücker, D., Küpper, A., Küster, H., Kuhlen, M., Kurča, T., Kurzhöfer, J., Laforge, B., Landon, M. P. J., Lange, W., Langenegger, U., Lebedev, A., Lehner, F., Lemaitre, V., Levonian, S., Lindström, G., Lindstroem, M., Linsel, F., Lipinski, J., List, B., Lobo, G., Lopez, G. C., Lubimov, V., Lüke, D., Lytkin, L., Magnussen, N., Mahlke-Krüger, H., Malinovski, E., Maraček, R., Marage, P., Marks, J., Marshall, R., Martens, J., Martin, G., Martin, R., Martyn, H. U., Martyniak, J., Mavroidis, T., Maxfield, S. J., McMahon, S. J., Mehta, A., Meier, K., Merkel, P., Metlica, F., Meyer, A., Meyer, A., Meyer, H., Meyer, J., Meyer, P. O., Migliori, A., Mikocki, S., Milstead, D., Moeck, J., Moreau, F., Morris, J. V., Mroczko, E., Müller, D., Müller, K., Murín, P., Nagovizin, V., Nahnhauer, R., Naroska, B., Naumann, Th., Néri, I., Newman, P. R., Newton, D., Nguyen, H. K., Nicholls, T. C., Niebergall, F., Niebuhr, C., Niedzballa, Ch., Niggli, H., Nowak, G., Nunnemann, T., Nyberg-Werther, M., Oberlack, H., Olsson, J. E., Ozerov, D., Palmen, P., Panaro, E., Panitch, A., Pascaud, C., Passaggio, S., Patel, G. D., Pawletta, H., Peppel, E., Perez, E., Phillips, J. P., Pieuchot, A., Pitzl, D., Pöschl, R., Pope, G., Povh, B., Prell, S., Rabbertz, K., Reimer, P., Rick, H., Riess, S., Rizvi, E., Robmann, P., Roosen, R., Rosenbauer, K., Rostovtsev, A., Rouse, F., Royon, C., Rüter, K., Rusakov, S., Rybicki, K., Sankey, D. P. C., Schacht, P., Schiek, S., Schleif, S., Schleper, P., von Schlippe, W., Schmidt, D., Schmidt, G., Schoeffel, L., Schöning, A., Schröder, V., Schuhmann, E., Schwab, B., Sefkow, F., Semenov, A., Shekelyan, V., Sheviakov, I., Shtarkov, L. N., Siegmon, G., Siewert, U., Sirois, Y., Skillicorn, I. O., Sloan, T., Smirnov, P., Smith, M., Solochenko, V., Soloviev, Y., Specka, A., Spiekermann, J., Spielman, S., Spitzer, H., Squinabol, F., Steffen, P., Steinberg, R., Steinhart, J., Stella, B., Stellberger, A., Stier, J., Stiewe, J., Stößlein, U., Stolze, K., Straumann, U., Struczinski, W., Sutton, J. P., Tapprogge, S., Taševský, M., Tchernyshov, V., Tchetchelnitski, S., Theissen, J., Thiebaux, C., Thompson, G., Thompson, P. D., Tobien, N., Todenhagen, R., Truöl, P., Tsipolitis, G., Turnau, J., Tzamariudaki, E., Uelkes, P., Usik, A., Valkár, S., Valkárova, A., Vallée, C., Van Esch, P., Van Mechelen, P., Vandenplas, D., Vazdik, Y., Verrecchia, P., Villet, G., Wacker, K., Wagener, A., Wagener, M., Wallny, R., Waugh, B., Weber, G., Weber, M., Wegener, D., Wegner, A., Wengler, T., Werner, M., West, L. R., Wiesand, S., Wilksen, T., Willard, S., Winde, M., Winter, G. G., Wittek, C., Wobisch, M., Wollatz, H., Wünsch, E., Zácěk, J., Zarbock, D., Zhang, Z., Zhokin, A., Zini, P., Zomer, F., Zsembery, J., Zuber, K., zurNedden, M., and H1 Collaboration
Published: 1997
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6. Photoproduction with a leading proton at HERA

Author: Adloff, C., Andreev, V., Andrieu, B., Anthonis, T., Arkadov, V., Astvatsatourov, A., Ayyaz, I., Babaev, A., Bähr, J., Baranov, P., Barrelet, E., Bartel, W., Bate, P., Beglarian, A., Behnke, O., Beier, C., Belousov, A., Benisch, T., Berger, Ch., Berndt, T., Bizot, J.C., Boudry, V., Braunschweig, W., Brisson, V., Bröker, H.-B., Brown, D.P., Brückner, W., Bruel, P., Bruncko, D., Bürger, J., Büsser, F.W., Bunyatyan, A., Burkhardt, H., Burrage, A., Buschhorn, G., Campbell, A.J., Cao, J., Carli, T., Caron, S., Chabert, E., Clarke, D., Clerbaux, B., Collard, C., Contreras, J.G., Coppens, Y.R., Coughlan, J.A., Cousinou, M.-C., Cox, B.E., Cozzika, G., Cvach, J., Dainton, J.B., Dau, W.D., Daum, K., Davidsson, M., Delcourt, B., Delerue, N., Demirchyan, R., De Roeck, A., De Wolf, E.A., Diaconu, C., Dixon, P., Dodonov, V., Dowell, J.D., Droutskoi, A., Duprel, C., Eckerlin, G., Eckstein, D., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Ellerbrock, M., Elsen, E., Erdmann, M., Erdmann, W., Faulkner, P.J.W., Favart, L., Fedotov, A., Felst, R., Ferencei, J., Ferron, S., Fleischer, M., Fleming, Y.H., Flügge, G., Fomenko, A., Foresti, I., Formánek, J., Foster, J.M., Franke, G., Gabathuler, E., Gabathuler, K., Garvey, J., Gassner, J., Gayler, J., Gerhards, R., Ghazaryan, S., Goerlich, L., Gogitidze, N., Goldberg, M., Goodwin, C., Grab, C., Grässler, H., Greenshaw, T., Grindhammer, G., Hadig, T., Haidt, D., Hajduk, L., Haynes, W.J., Heinemann, B., Heinzelmann, G., Henderson, R.C.W., Hengstmann, S., Henschel, H., Heremans, R., Herrera, G., Herynek, I., Hildebrandt, M., Hilgers, M., Hiller, K.H., Hladký, J., Höting, P., Hoffmann, D., Horisberger, R., Hurling, S., Ibbotson, M., İşsever, Ç., Jacquet, M., Jaffre, M., Janauschek, L., Jansen, D.M., Janssen, X., Jemanov, V., Jönsson, L., Johnson, D.P., Jones, M.A.S., Jung, H., Kästli, H.K., Kant, D., Kapichine, M., Karlsson, M., Karschnick, O., Keil, F., Keller, N., Kennedy, J., Kenyon, I.R., Kermiche, S., Kiesling, C., Kjellberg, P., Klein, M., Kleinwort, C., Knies, G., Koblitz, B., Kolya, S.D., Korbel, V., Kostka, P., Kotelnikov, S.K., Koutouev, R., Koutov, A., Krasny, M.W., Krehbiel, H., Kroseberg, J., Krüger, K., Küpper, A., Kuhr, T., Kurča, T., Lahmann, R., Lamb, D., Landon, M.P.J., Lange, W., Laštovička, T., Laycock, P., Lebailly, E., Lebedev, A., Leißner, B., Lemrani, R., Lendermann, V., Levonian, S., Lindstroem, M., List, B., Lobodzinska, E., Lobodzinski, B., Loginov, A., Loktionova, N., Lubimov, V., Lüders, S., Lüke, D., Lytkin, L., Magnussen, N., Mahlke-Krüger, H., Malden, N., Malinovski, E., Malinovski, I., Maraček, R., Marage, P., Marks, J., Marshall, R., Martyn, H.-U., Martyniak, J., Maxfield, S.J., Mehta, A., Meier, K., Merkel, P., Meyer, A.B., Meyer, H., Meyer, J., Meyer, P.-O., Mikocki, S., Milstead, D., Mkrtchyan, T., Mohr, R., Mohrdieck, S., Mondragon, M.N., Moreau, F., Morozov, A., Morris, J.V., Müller, K., Murı́n, P., Nagovizin, V., Naroska, B., Naumann, J., Naumann, Th., Nellen, G., Newman, P.R., Nicholls, T.C., Niebergall, F., Niebuhr, C., Nix, O., Nowak, G., Nunnemann, T., Olsson, J.E., Ozerov, D., Panassik, V., Pascaud, C., Patel, G.D., Perez, E., Phillips, J.P., Pitzl, D., Pöschl, R., Potachnikova, I., Povh, B., Rabbertz, K., Rädel, G., Rauschenberger, J., Reimer, P., Reisert, B., Reyna, D., Riess, S., Risler, C., Rizvi, E., Robmann, P., Roosen, R., Rostovtsev, A., Royon, C., Rusakov, S., Rybicki, K., Sankey, D.P.C., Scheins, J., Schilling, F.-P., Schleper, P., Schmidt, D., Schmitt, S., Schoeffel, L., Schöning, A., Schörner, T., Schröder, V., Schultz-Coulon, H.-C., Schwanenberger, C., Sedlák, K., Sefkow, F., Shekelyan, V., Sheviakov, I., Shtarkov, L.N., Sievers, P., Sirois, Y., Sloan, T., Smirnov, P., Solochenko, V., Soloviev, Y., Spaskov, V., Specka, A., Spitzer, H., Stamen, R., Steinhart, J., Stella, B., Stellberger, A., Stiewe, J., Straumann, U., Struczinski, W., Swart, M., Taševský, M., Tchernyshov, V., Tchetchelnitski, S., Thompson, G., Thompson, P.D., Tobien, N., Traynor, D., Truöl, P., Tsipolitis, G., Tsurin, I., Turnau, J., Turney, J.E., Tzamariudaki, E., Udluft, S., Usik, A., Valkár, S., Valkárová, A., Vallée, C., Van Mechelen, P., Vassiliev, S., Vazdik, Y., Vichnevski, A., Wacker, K., Wallny, R., Walter, T., Waugh, B., Weber, G., Weber, M., Wegener, D., Werner, M., White, G., Wiesand, S., Wilksen, T., Winde, M., Winter, G.-G., Wissing, Ch., Wobisch, M., Wollatz, H., Wünsch, E., Wyatt, A.C., Žáček, J., Zálešák, J., Zhang, Z., Zhokin, A., Zomer, F., Zsembery, J., and zur Nedden, M.
Published: 2001
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7. Search for compositeness, leptoquarks and large extra dimensions in eq contact interactions at HERA

Author: Adloff, C., Andreev, V., Andrieu, B., Arkadov, V., Astvatsatourov, A., Ayyaz, I., Babaev, A., Bähr, J., Baranov, P., Barrelet, E., Bartel, W., Bassler, U., Bate, P., Beglarian, A., Behnke, O., Beier, C., Belousov, A., Benisch, T., Berger, Ch., Bernardi, G., Berndt, T., Bertrand-Coremans, G., Bizot, J.C., Borras, K., Boudry, V., Braunschweig, W., Brisson, V., Bröker, H.-B., Brown, D.P., Brückner, W., Bruel, P., Bruncko, D., Bürger, J., Büsser, F.W., Bunyatyan, A., Burkhardt, H., Burrage, A., Buschhorn, G., Campbell, A.J., Cao, J., Carli, T., Caron, S., Chabert, E., Clarke, D., Clerbaux, B., Collard, C., Contreras, J.G., Coughlan, J.A., Cousinou, M.-C., Cox, B.E., Cozzika, G., Cvach, J., Dainton, J.B., Dau, W.D., Daum, K., David, M., Davidsson, M., Delcourt, B., Delerue, N., Demirchyan, R., De Roeck, A., De Wolf, E.A., Diaconu, C., Dixon, P., Dodonov, V., Donovan, K.T., Dowell, J.D., Droutskoi, A., Duprel, C., Ebert, J., Eckerlin, G., Eckstein, D., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Ellerbrock, M., Elsen, E., Erdmann, M., Erdmann, W., Faulkner, P.J.W., Favart, L., Fedotov, A., Felst, R., Ferencei, J., Ferrarotto, F., Ferron, S., Fleischer, M., Flügge, G., Fomenko, A., Foresti, I., Formánek, J., Foster, J.M., Franke, G., Gabathuler, E., Gabathuler, K., Garvey, J., Gassner, J., Gayler, J., Gerhards, R., Ghazaryan, S., Goerlich, L., Gogitidze, N., Goldberg, M., Goodwin, C., Grab, C., Grässler, H., Greenshaw, T., Grindhammer, G., Hadig, T., Haidt, D., Hajduk, L., Haustein, V., Haynes, W.J., Heinemann, B., Heinzelmann, G., Henderson, R.C.W., Hengstmann, S., Henschel, H., Heremans, R., Herrera, G., Herynek, I., Hilgers, M., Hiller, K.H., Hilton, C.D., Hladký, J., Höting, P., Hoffmann, D., Hoprich, W., Horisberger, R., Hurling, S., Ibbotson, M., İşsever, Ç., Jacquet, M., Jaffre, M., Janauschek, L., Jansen, D.M., Janssen, X., Jemanov, V., Jönsson, L., Johnson, D.P., Jones, M.A.S., Jung, H., Kästli, H.K., Kant, D., Kapichine, M., Karlsson, M., Karschnick, O., Kaufmann, O., Kausch, M., Keil, F., Keller, N., Kennedy, J., Kenyon, I.R., Kermiche, S., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Koblitz, B., Kolanoski, H., Kolya, S.D., Korbel, V., Kostka, P., Kotelnikov, S.K., Krasny, M.W., Krehbiel, H., Kroseberg, J., Krücker, D., Krüger, K., Küpper, A., Kuhr, T., Kurča, T., Kutuev, R., Lachnit, W., Lahmann, R., Lamb, D., Landon, M.P.J., Lange, W., Laštovička, T., Lebedev, A., Leißner, B., Lemrani, R., Lendermann, V., Levonian, S., Lindstroem, M., Lobo, G., Lobodzinska, E., Lobodzinski, B., Loktionova, N., Lubimov, V., Lüders, S., Lüke, D., Lytkin, L., Magnussen, N., Mahlke-Krüger, H., Malden, N., Malinovski, E., Malinovski, I., Maraček, R., Marage, P., Marks, J., Marshall, R., Martyn, H.-U., Martyniak, J., Maxfield, S.J., Mehta, A., Meier, K., Merkel, P., Metlica, F., Meyer, A., Meyer, H., Meyer, J., Meyer, P.-O., Mikocki, S., Milstead, D., Mkrtchyan, T., Mohr, R., Mohrdieck, S., Mondragon, M.N., Moreau, F., Morozov, A., Morris, J.V., Müller, D., Müller, K., Murı́n, P., Nagovizin, V., Naroska, B., Naumann, J., Naumann, Th., Négri, I., Nellen, G., Newman, P.R., Nicholls, T.C., Niebergall, F., Niebuhr, C., Nix, O., Nowak, G., Nunnemann, T., Olsson, J.E., Ozerov, D., Panassik, V., Pascaud, C., Patel, G.D., Perez, E., Phillips, J.P., Pitzl, D., Pöschl, R., Potachnikova, I., Povh, B., Rabbertz, K., Rädel, G., Rauschenberger, J., Reimer, P., Reisert, B., Reyna, D., Riess, S., Rizvi, E., Robmann, P., Roosen, R., Rostovtsev, A., Royon, C., Rusakov, S., Rybicki, K., Sankey, D.P.C., Scheins, J., Schilling, F.-P., Schleif, S., Schleper, P., Schmidt, D., Schoeffel, L., Schöning, A., Schörner, T., Schröder, V., Schultz-Coulon, H.-C., Sedlák, K., Sefkow, F., Shekelyan, V., Sheviakov, I., Shtarkov, L.N., Siegmon, G., Sievers, P., Sirois, Y., Sloan, T., Smirnov, P., Smith, M., Solochenko, V., Soloviev, Y., Spaskov, V., Specka, A., Spitzer, H., Stamen, R., Steinhart, J., Stella, B., Stellberger, A., Stiewe, J., Straumann, U., Struczinski, W., Swart, M., Taševský, M., Tchernyshov, V., Tchetchelnitski, S., Thompson, G., Thompson, P.D., Tobien, N., Traynor, D., Truöl, P., Tsipolitis, G., Turnau, J., Turney, J.E., Tzamariudaki, E., Udluft, S., Usik, A., Valkár, S., Valkárová, A., Vallée, C., Van Mechelen, P., Vazdik, Y., von Dombrowski, S., Wacker, K., Wallny, R., Walter, T., Waugh, B., Weber, G., Weber, M., Wegener, D., Wegner, A., Wengler, T., Werner, M., White, G., Wiesand, S., Wilksen, T., Winde, M., Winter, G.-G., Wissing, C., Wobisch, M., Wollatz, H., Wünsch, E., Wyatt, A.C., Žáček, J., Zálešák, J., Zhang, Z., Zhokin, A., Zomer, F., Zsembery, J., and zur Nedden, M.
Published: 2000
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8. Measurement of [formula omitted] meson cross sections at HERA and determination of the gluon density in the proton using NLO QCD

Author: Adloff, C., Anderson, M., Andreev, V., Andrieu, B., Arkadov, V., Arndt, C., Ayyaz, I., Babaev, A., Bähr, J., Baranov, P., Barrelet, E., Bartel, W., Bassler, U., Bate, P., Beck, M., Beglarian, A., Behnke, O., Behrend, H.-J., Beier, C., Belousov, A., Berger, Ch., Bernardi, G., Bertrand-Coremans, G., Biddulph, P., Bizot, J.C., Boudry, V., Braunschweig, W., Brisson, V., Brown, D.P., Brückner, W., Bruel, P., Bruncko, D., Bürger, J., Büsser, F.W., Buniatian, A., Burke, S., Burrage, A., Buschhorn, G., Calvet, D., Campbell, A.J., Carli, T., Chabert, E., Charlet, M., Clarke, D., Clerbaux, B., Contreras, J.G., Cormack, C., Coughlan, J.A., Cousinou, M.-C., Cox, B.E., Cozzika, G., Cvach, J., Dainton, J.B., Dau, W.D., Daum, K., David, M., Davidsson, M., De Roeck, A., De Wolf, E.A., Delcourt, B., Demirchyan, R., Diaconu, C., Dirkmann, M., Dixon, P., Dlugosz, W., Donovan, K.T., Dowell, J.D., Droutskoi, A., Ebert, J., Eckerlin, G., Eckstein, D., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Elsen, E., Enzenberger, M., Erdmann, M., Fahr, A.B., Favart, L., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Ferrarotto, F., Fleischer, M., Flügge, G., Fomenko, A., Formánek, J., Foster, J.M., Franke, G., Gabathuler, E., Gabathuler, K., Gaede, F., Garvey, J., Gassner, J., Gayler, J., Gerhards, R., Ghazaryan, S., Glazov, A., Goerlich, L., Gogitidze, N., Goldberg, M., Gorelov, I., Grab, C., Grässler, H., Greenshaw, T., Griffiths, R.K., Grindhammer, G., Hadig, T., Haidt, D., Hajduk, L., Haller, T., Hampel, M., Haustein, V., Haynes, W.J., Heinemann, B., Heinzelmann, G., Henderson, R.C.W., Hengstmann, S., Henschel, H., Heremans, R., Herynek, I., Hewitt, K., Hiller, K.H., Hilton, C.D., Hladký, J., Hoffmann, D., Horisberger, R., Hurling, S., Ibbotson, M., İşsever, Ç., Jacquet, M., Jaffre, M., Jansen, D.M., Jönsson, L., Johnson, D.P., Jones, M., Jung, H., Kästli, H.K., Kander, M., Kant, D., Kapichine, M., Karlsson, M., Karschnik, O., Katzy, J., Kaufmann, O., Kausch, M., Kenyon, I.R., Kermiche, S., Keuker, C., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Köhne, J.H., Kolanoski, H., Kolya, S.D., Korbel, V., Kostka, P., Kotelnikov, S.K., Krämerkämper, T., Krasny, M.W., Krehbiel, H., Krücker, D., Krüger, K., Küpper, A., Küster, H., Kuhlen, M., Kurča, T., Lahmann, R., Landon, M.P.J., Lange, W., Langenegger, U., Lebedev, A., Lehner, F., Lemaitre, V., Lendermann, V., Levonian, S., Lindstroem, M., List, B., Lobo, G., Lobodzinska, E., Lubimov, V., Lüders, S., Lüke, D., Lytkin, L., Magnussen, N., Mahlke-Krüger, H., Malinovski, E., Maraček, R., Marage, P., Marks, J., Marshall, R., Martin, G., Martyn, H.-U., Martyniak, J., Maxfield, S.J., McMahon, T.R., Mehta, A., Meier, K., Merkel, P., Metlica, F., Meyer, A., Meyer, H., Meyer, J., Meyer, P.-O., Mikocki, S., Milstead, D., Moeck, J., Mohr, R., Mohrdieck, S., Moreau, F., Morris, J.V., Müller, D., Müller, K., Murin, P., Nagovizin, V., Naroska, B., Naumann, Th., Négri, I., Newman, P.R., Nguyen, H.K., Nicholls, T.C., Niebergall, F., Niebuhr, C., Niedzballa, Ch., Niggli, H., Nikitin, D., Nix, O., Nowak, G., Nunnemann, T., Oberlack, H., Olsson, J.E., Ozerov, D., Palmen, P., Panassik, V., Pascaud, C., Passaggio, S., Patel, G.D., Pawletta, H., Perez, E., Phillips, J.P., Pieuchot, A., Pitzl, D., Pöschl, R., Pope, G., Povh, B., Rabbertz, K., Rauschenberger, J., Reimer, P., Reisert, B., Reyna, D., Rick, H., Riess, S., Rizvi, E., Robmann, P., Roosen, R., Rosenbauer, K., Rostovtsev, A., Rouse, F., Royon, C., Rusakov, S., Rybicki, K., Sankey, D.P.C., Schacht, P., Scheins, J., Schilling, F.-P., Schleif, S., Schleper, P., Schmidt, D., Schoeffel, L., Schröder, V., Schultz-Coulon, H.-C., Schwab, B., Sefkow, F., Semenov, A., Shekelyan, V., Sheviakov, I., Shtarkov, L.N., Siegmon, G., Sirois, Y., Sloan, T., Smirnov, P., Smith, M., Solochenko, V., Soloviev, Y., Spaskov, V., Specka, A., Spiekermann, J., Spitzer, H., Squinabol, F., Steffen, P., Steinberg, R., Steinhart, J., Stella, B., Stellberger, A., Stiewe, J., Straumann, U., Struczinski, W., Sutton, J.P., Swart, M., Tapprogge, S., Taševský, M., Tchernshov, V., Tchetchelnitski, S., Theissen, J., Thompson, G., Thompson, P.D., Tobien, N., Todenhagen, R., Truöl, P., Tsipolitis, G., Turnau, J., Tzamariudaki, E., Udluft, S., Usik, A., Valkár, S., Valkárová, A., Vallée, C., Van Esch, P., Van Haecke, A., Van Mechelen, P., Vazdik, Y., Villet, G., Wacker, K., Wallny, R., Walter, T., Waugh, B., Weber, G., Weber, M., Wegener, D., Wegner, A., Wengler, T., Werner, M., West, L.R., Wiesand, S., Wilksen, T., Willard, S., Winde, M., Winter, G.-G., Wittek, C., Wittmann, E., Wobisch, M., Wollatz, H., Wünsch, E., Žaček, J., Zálešak, J., Zhang, Z., Zhokin, A., Zini, P., Zomer, F., Zsembery, J., and zurNedden, M.
Published: 1999
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9. Measurement of internal jet structure in dijet production in deep-inelastic scattering at HERA

Author: Adloff, C., Andreev, V., Andrieu, B., Arkadov, V., Astvatsatourov, A., Ayyaz, I., Babaev, A., Bähr, J., Baranov, P., Barrelet, E., Bartel, W., Bassler, U., Bate, P., Beglarian, A., Behnke, O., Behrend, H.-J., Beier, C., Belousov, A., Berger, Ch., Bernardi, G., Berndt, T., Bertrand-Coremans, G., Biddulph, P., Bizot, J.C., Boudry, V., Braunschweig, W., Brisson, V., Brown, D.P., Brückner, W., Bruel, P., Bruncko, D., Bürger, J., Büsser, F.W., Buniatian, A., Burke, S., Buschhorn, G., Calvet, D., Campbell, A.J., Carli, T., Chabert, E., Charlet, M., Clarke, D., Clerbaux, B., Cocks, S., Contreras, J.G., Cormack, C., Coughlan, J.A., Cousinou, M.-C., Cox, B.E., Cozzika, G., Cvach, J., Dainton, J.B., Dau, W.D., Daum, K., David, M., Davidsson, M., De Roeck, A., De Wolf, E.A., Delcourt, B., Demirchyan, R., Diaconu, C., Dirkmann, M., Dixon, P., Dlugosz, W., Donovan, K.T., Dowell, J.D., Droutskoi, A., Ebert, J., Eckerlin, G., Eckstein, D., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Elsen, E., Enzenberger, M., Erdmann, M., Farh, A.B., Favart, L., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Ferrarotto, F., Fleischer, M., Flügge, G., Fomenko, A., Formánek, J., Foster, J.M., Franke, G., Gabathuler, E., Gabathuler, K., Gaede, F., Garvey, J., Gassner, J., Gayler, J., Gerhards, R., Ghazaryan, S., Glazov, A., Goerlich, L., Gogitidze, N., Goldberg, M., Gorelov, I., Grab, C., Grässler, H., Greenshaw, T., Griffiths, R.K., Grindhammer, G., Hadig, T., Haidt, D., Hajduk, L., Hampel, M., Haustein, V., Haynes, W.J., Heinemann, B., Heinzelmann, G., Henderson, R.C.W., Hengstmann, S., Henschel, H., Heremans, R., Herynek, I., Hewitt, K., Hiller, K.H., Hilton, C.D., Hladký, J., Hoffmann, D., Holtom, T., Horisberger, R., Hurling, S., Ibbotson, M., İşsever, Ç., Jacquet, M., Jaffre, M., Jansen, D.M., Jönsson, L., Johnson, D.P., Jung, H., Kästli, H.K., Kander, M., Kant, D., Kapichine, M., Karlsson, M., Karschnik, O., Katzy, J., Kaufmann, O., Kausch, M., Keller, N., Kenyon, I.R., Kermiche, S., Keuker, C., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Köhne, J.H., Kolanoski, H., Kolya, S.D., Korbel, V., Kostka, P., Kotelnikov, S.K., Krämerkämper, T., Krasny, M.W., Krehbiel, H., Krücker, D., Krüger, K., Küpper, A., Küster, H., Kuhlen, M., Kurča, T., Lachnit, W., Lahmann, R., Lamb, D., Landon, M.P.J., Lange, W., Langenegger, U., Lebedev, A., Lehner, F., Lemaitre, V., Lemrani, R., Lendermann, V., Levonian, S., Lindstroem, M., Lobo, G., Lobodzinska, E., Lubimov, V., Lüders, S., Lüke, D., Lytkin, L., Magnussen, N., Mahlke-Krüger, H., Malden, N., Malinovsky, E., Malinovski, I., Maraček, R., Marage, P., Marks, J., Marshall, R., Martyn, H.-U., Martyniak, J., Maxfield, S.J., McMahon, S.J., McMahon, T.R., Mehta, A., Meier, K., Merkel, P., Metlica, F., Meyer, A., Meyer, H., Meyer, J., Meyer, P.-O., Mikocki, S., Milstead, D., Mohr, R., Mohrdieck, S., Mondragon, M., Moreau, F., Morozov, A., Morris, J.V., Müller, D., Müller, K., Murín, P., Nagovizin, V., Naroska, B., Naumann, J., Naumann, Th., Négri, I., Newman, P.R., Nguyen, H.K., Nicholls, T.C., Niebergall, F., Niebuhr, C., Niedzballa, Ch., Niggli, H., Nix, O., Nowak, G., Nunnemann, T., Oberlack, H., Olsson, J.E., Ozerov, D., Palmen, P., Panassik, V., Pascaud, C., Passaggio, S., Patel, G.D., Pawletta, H., Perez, E., Phillips, J.P., Pieuchot, A., Pitzl, D., Pöschl, R., Pope, G., Povh, B., Rabbertz, K., Rauschenberger, J., Reimer, P., Reisert, B., Reyna, D., Rick, H., Riess, S., Rizvi, E., Robmann, P., Roosen, R., Rosenbauer, K., Rostovtsev, A., Rouse, F., Royon, C., Rusakov, S., Rybicki, K., Sankey, D.P.C., Schacht, P., Scheins, J., Schilling, F.-P., Schleif, S., Schleper, P., Schmidt, D., Schoeffel, L., Schröder, V., Schultz-Coulon, H.-C., Sefkow, F., Semenov, A., Shekelyan, V., Sheviakov, I., Shtarkov, L.N., Siegmon, G., Sirois, Y., Sloan, T., Smirnov, P., Smith, M., Solochenko, V., Soloviev, Y., Sonnenschein, L., Spaskov, V., Specka, A., Spitzer, H., Squinabol, F., Stamen, R., Steffen, P., Steinberg, R., Steinhart, J., Stella, B., Stellberger, A., Stiewe, J., Straumann, U., Struczinski, W., Sutton, J.P., Swart, M., Tapprogge, S., Taševský, M., Tchernyshov, V., Tchetchelnitski, S., Theissen, J., Thompson, G., Thompson, P.D., Tobien, N., Todenhagen, R., Traynor, D., Truöl, P., Tsipolitis, G., Turnau, J., Tzamariudaki, E., Udluft, S., Usik, A., Valkár, S., Valkárová, A., Vallée, C., Van Esch, P., Van Haecke, A., Van Mechelen, P., Vazdik, Y., Villet, G., Wacker, K., Wallny, R., Walter, T., Waugh, B., Weber, G., Weber, M., Wegener, D., Wegner, A., Wengler, T., Werner, M., West, L.R., Wiesand, S., Wilksen, T., Willard, S., Winde, M., Winter, G.-G., Wissing, Ch., Wittek, C., Wittmann, E., Wobisch, M., Wollatz, H., Wünsch, E., Žáček, J., Zálešák, J., Zhang, Z., Zhokin, A., Zini, P., Zomer, F., Zsembery, J., and zur Nedden, M.
Published: 1999
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10. Forward jet and particle production at HERA

Author: Adloff, C., Anderson, M., Andreev, V., Andrieu, B., Arkadov, V., Arndt, C., Ayyaz, I., Babaev, A., Bähr, J., Bán, J., Baranov, P., Barrelet, E., Bartel, W., Bassler, U., Bate, P., Beck, M., Beglarian, A., Behnke, O., Behrend, H.-J., Beier, C., Belousov, A., Berger, Ch., Bernardi, G., Bertrand-Coremans, G., Biddulph, P., Bizot, J.C., Boudry, V., Braunschweig, W., Brisson, V., Brown, D.P., Brückner, W., Bruel, P., Bruncko, D., Bürger, J., Büsser, F.W., Buniatian, A., Burke, S., Buschhorn, G., Calvet, D., Campbell, A.J., Carli, T., Chabert, E., Charlet, M., Clarke, D., Clerbaux, B., Cocks, S., Contreras, J.G., Cormack, C., Coughlan, J.A., Cousinou, M.-C., Cox, B.E., Cozzika, G., Cvach, J., Dainton, J.B., Dau, W.D., Daum, K., David, M., Davidsson, M., De Roeck, A., De Wolf, E.A., Delcourt, B., Demirchyan, R., Diaconu, C., Dirkmann, M., Dixon, P., Dlugosz, W., Donovan, K.T., Dowell, J.D., Droutskoi, A., Ebert, J., Eckerlin, G., Eckstein, D., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Elsen, E., Enzenberger, M., Erdmann, M., Fahr, A.B., Favart, L., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Ferrarotto, F., Fleischer, M., Flügge, G., Fomenko, A., Formánek, J., Foster, J.M., Franke, G., Gabathuler, E., Gabathuler, K., Gaede, F., Garvey, J., Gayler, J., Gerhards, R., Ghazaryan, S., Glazov, A., Goerlich, L., Gogitidze, N., Goldberg, M., Gorelov, I., Grab, C., Grässler, H., Greenshaw, T., Griffiths, R.K., Grindhammer, G., Hadig, T., Haidt, D., Hajduk, L., Haller, T., Hampel, M., Haustein, V., Haynes, W.J., Heinemann, B., Heinzelmann, G., Henderson, R.C.W., Hengstmann, S., Henschel, H., Heremans, R., Herynek, I., Hewitt, K., Hiller, K.H., Hilton, C.D., Hladký, J., Hoffmann, D., Holtom, T., Horisberger, R., Hudgson, V.L., Hurling, S., Ibbotson, M., İşsever, Ç., Itterbeck, H., Jacquet, M., Jaffre, M., Jansen, D.M., Jönsson, L., Johnson, D.P., Jung, H., Kästli, H.K., Kander, M., Kant, D., Kapichine, M., Karlsson, M., Karschnik, O., Katzy, J., Kaufmann, O., Kausch, M., Kenyon, I.R., Kermiche, S., Keuker, C., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Köhne, J.H., Kolanoski, H., Kolya, S.D., Korbel, V., Kostka, P., Kotelnikov, S.K., Krämerkämper, T., Krasny, M.W., Krehbiel, H., Krücker, D., Krüger, K., Küpper, A., Küster, H., Kuhlen, M., Kurča, T., Laforge, B., Lahmann, R., Landon, M.P.J., Lange, W., Langenegger, U., Lebedev, A., Lehner, F., Lemaitre, V., Lendermann, V., Levonian, S., Lindstroem, M., List, B., Lobo, G., Lobodzinska, E., Lubimov, V., Lüke, D., Lytkin, L., Magnussen, N., Mahlke-Krüger, H., Malinovski, E., Maraček, R., Marage, P., Marks, J., Marshall, R., Martin, G., Martyn, H.-U., Martyniak, J., Maxfield, S.J., McMahon, S.J., McMahon, T.R., Mehta, A., Meier, K., Merkel, P., Metlica, F., Meyer, A., Meyer, H., Meyer, J., Meyer, P.-O., Mikochi, S., Milstead, D., Moeck, J., Mohr, R., Mohrdieck, S., Moreau, F., Morris, J.V., Müller, D., Müller, K., Murín, P., Nagovizin, V., Naroska, B., Naumann, Th., Négri, I., Newman, P.R., Nguyen, H.K., Nicholls, T.C., Niebergall, F., Niebuhr, C., Niedzballa, Ch., Niggli, H., Nikitin, D., Nix, O., Nowak, G., Nunnemann, T., Oberlack, H., Olsson, J.E., Ozerov, D., Palmen, P., Panassik, V., Pascaud, C., Passaggio, S., Patel, G.D., Pawletta, H., Perez, E., Phillips, J.P., Pieuchot, A., Pitzl, D., Pöschl, R., Pope, G., Povh, B., Rabbertz, K., Rauschenberger, J., Reimer, P., Reisert, B., Rick, H., Riess, S., Rizvi, E., Robmann, P., Roosen, R., Rosenbauer, K., Rostovtsev, A., Rouse, F., Royon, C., Rusakov, S., Rybicki, K., Sankey, D.P.C., Schacht, P., Scheins, J., Schleif, S., Schleper, P., Schmidt, D., Schoeffel, L., Schröder, V., Schultz-Coulon, H.-C., Schwab, B., Sefkow, F., Semenov, A., Shekelyan, V., Sheviakov, I., Shtarkov, L.N., Siegmon, G., Sirois, Y., Sloan, T., Smirnov, P., Smith, M., Solochenko, V., Soloviev, Y., Spaskov, V., Specka, A., Spiekermann, J., Spitzer, H., Squinabol, F., Steffen, P., Steinberg, R., Steinhart, J., Stella, B., Stellberger, A., Stiewe, J., Straumann, U., Struczinski, W., Sutton, J.P., Swart, M., Tapprogge, S., Taševský, M., Tchernyshov, V., Tchetchelnitski, S., Theissen, J., Thompson, G., Thompson, P.D., Tobien, N., Todenhagen, R., Truöl, P., Tsipolitis, G., Turnau, J., Tzamariudaki, E., Udluft, S., Usik, A., Valkár, S., Valkárová, A., Vallée, C., Van Esch, P., Van Haecke, A., Van Mechelen, P., Vazdik, Y., Villet, G., Wacker, K., Wallny, R., Walter, T., Waugh, B., Weber, G., Weber, M., Wegener, D., Wegner, A., Wengler, T., Werner, M., West, L.R., Wiesand, S., Wilksen, T., Willard, S., Winde, M., Winter, G.-G., Wittek, C., Wittmann, E., Wobisch, M., Wollatz, H., Wünsch, E., Žáček, J., Zálešák, J., Zhang, Z., Zhokin, A., Zini, P., Zomer, F., Zsembery, J., and zurNedden, M.
Published: 1999
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11. Measurement of open beauty production at HERA

Author: Adloff, C., Andreev, V., Andrieu, B., Arkadov, V., Astvatsatourov, A., Ayyaz, I., Babaev, A., Bähr, J., Baranov, P., Barrelet, E., Bartel, W., Bassler, U., Bate, P., Beglarian, A., Behnke, O., Beier, C., Belousov, A., Benisch, T., Berger, Ch., Bernardi, G., Berndt, T., Bertrand-Coremans, G., Biddulph, P., Bizot, J.C., Boudry, V., Braunschweig, W., Brisson, V., Bröker, H.-B., Brown, D.P., Brückner, W., Bruel, P., Bruncko, D., Bürger, J., Büsser, F.W., Bunyatyan, A., Burke, S., Burrage, A., Buschhorn, G., Calvet, D., Campbell, A.J., Cao, J., Carli, T., Chabert, E., Charlet, M., Clarke, D., Clerbaux, B., Collard, C., Contreras, J.G., Coughlan, J.A., Cousinou, M.-C., Cox, B.E., Cozzika, G., Cvach, J., Dainton, J.B., Dau, W.D., Daum, K., David, M., Davidsson, M., Delcourt, B., Demirchyan, R., De Roeck, A., De Wolf, E.A., Diaconu, C., Dixon, P., Dodonov, V., Donovan, K.T., Dowell, J.D., Droutskoi, A., Duprel, C., Ebert, J., Eckerlin, G., Eckstein, D., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Elsen, E., Erdmann, M., Fahr, A.B., Faulkner, P.J.W., Favart, L., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Ferrarotto, F., Ferron, S., Fleischer, M., Flügge, G., Fomenko, A., Foresti, I., Formánek, J., Foster, J.M., Franke, G., Gabathuler, E., Gabathuler, K., Garvey, J., Gassner, J., Gayler, J., Gerhards, R., Ghazaryan, S., Glazov, A., Goerlich, L., Gogitidze, N., Goldberg, M., Gorelov, I., Grab, C., Grässler, H., Greenshaw, T., Griffiths, R.K., Grindhammer, G., Hadig, T., Haidt, D., Hajduk, L., Haustein, V., Haynes, W.J., Heinemann, B., Heinzelmann, G., Henderson, R.C.W., Hengstmann, S., Henschel, H., Heremans, R., Herrera, G., Herynek, I., Hilgers, M., Hiller, K.H., Hilton, C.D., Hladký, J., Höting, P., Hoffmann, D., Horisberger, R., Hurling, S., Ibbotson, M., Jacquet, M., Jaffre, M., Janauschek, L., Jansen, D.M., Janssen, X., Jönsson, L., Johnson, D.P., Zhokin, A., Jones, M., Jung, H., Kästli, H.K., Kant, D., Kapichine, M., Karlsson, M., Karschnick, O., Kaufmann, O., Kausch, M., Keil, F., Keller, N., Kenyon, I.R., Kermiche, S., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Kolanoski, H., Kolya, S.D., Korbel, V., Kostka, P., Kotelnikov, S.K., Krasny, M.W., Krehbiel, H., Kroseberg, J., Krücker, D., Krüger, K., Küpper, A., Kuhr, T., Kurča, T., Lachnit, W., Lahmann, R., Lamb, D., Landon, M.P.J., Lange, W., Langenegger, U., Lebedev, A., Lehner, F., Lemaitre, V., Lemrani, R., Lendermann, V., Levonian, S., Lindstroem, M., Lubimov, V., Lobo, G., Lobodzinska, E., Lüders, S., Lüke, D., Lytkin, L., Magnussen, N., Mahlke-Krüger, H., Malden, N., Malinovski, E., Malinovski, I., Maraček, R., Marage, P., Marks, J., Marshall, R., Martyn, H.-U., Martyniak, J., Maxfield, S.J., McMahon, T.R., Mehta, A., Meier, K., Merkel, P., Metlica, F., Meyer, A., Meyer, H., Meyer, J., Meyer, P.-O., Mikocki, S., Milstead, D., Mohr, R., Mohrdieck, S., Mondragon, M.N., Moreau, F., Morozov, A., Morris, J.V., Müller, D., Müller, K., Murı́n, P., Nagovizin, V., Naroska, B., Naumann, J., Naumann, Th., Négri, I., Newman, P.R., Nguyen, H.K., Nicholls, T.C., Niebergall, F., Niebuhr, C., Nix, O., Nowak, G., Nunnemann, T., Olsson, J.E., Usik, A., Ozerov, D., Palmen, P., Panassik, V., Pascaud, C., Passaggio, S., Patel, G.D., Pawletta, H., Perez, E., Phillips, J.P., Pitzl, D., Pöschl, R., Potashnikova, I., Povh, B., Rabbertz, K., Rädel, G., Rauschenberger, J., Reimer, P., Reisert, B., Reyna, D., Riess, S., Rizvi, E., Robmann, P., Roosen, R., Rostovtsev, A., Royon, C., Rusakov, S., Rybicki, K., Sankey, D.P.C., Scheins, J., Schilling, F.-P., Schleif, S., Schleper, P., Schmidt, D., Schoeffel, L., Schörner, T., Schröder, V., Schultz-Coulon, H.-C., Sefkow, F., Shekelyan, V., Sheviakov, I., Shtarkov, L.N., Siegmon, G., Sirois, Y., Sloan, T., Smirnov, P., Smith, M., Solochenko, V., Soloviev, Y., Spaskov, V., Specka, A., Spitzer, H., Stamen, R., Steinhart, J., Stella, B., Stellberger, A., Stiewe, J., Straumann, U., Struczinski, W., Sutton, J.P., Swart, M., Taševský, M., Tchernyshov, V., Tchetchelnitski, S., Thompson, G., Thompson, P.D., Tobien, N., Todenhagen, R., Traynor, D., Truöl, P., Tsipolitis, G., Turnau, J., Turney, J., Tzamariudaki, E., Udluft, S., Valkár, S., Valkárová, A., Vallée, C., Van Haecke, A., Van Mechelen, P., Vazdik, Y., Villet, G., von Dombrowski, S., Wacker, K., Wallny, R., Walter, T., Waugh, B., Weber, G., Weber, M., Wegener, D., Wegner, A., Wengler, T., Werner, M., West, L.R., White, G., Wiesand, S., Wilksen, T., Winde, M., Winter, G.-G., Wissing, Ch., Wobisch, M., Wollatz, H., Wünsch, E., Žáček, J., Zálešák, J., Zhang, Z., Zini, P., Zomer, F., Zsembery, J., and zur Nedden, M.
Published: 1999
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12. Forward π°-meson production at HERA

Author: Adloff, C., Andreev, V., Andrieu, B., Arkadov, V., Astvatsatourov, A., Ayyaz, I., Babaev, A., Bähr, J., Baranov, P., Barrelet, E., Bartel, W., Bassler, U., Bate, P., Beglarian, A., Behnke, O., Beier, C., Belousov, A., Benisch, T., Berger, Ch., Bernardi, G., Berndt, T., Bertrand-Coremans, G., Biddulph, P., Bizot, J.C., Borras, K., Boudry, V., Braunschweig, W., Brisson, V., Bröker, H.-B., Brown, D.P., Brückner, W., Bruel, P., Bruncko, D., Bürger, J., Büsser, F.W., Bunyatyan, A., Burke, S., Burrage, A., Buschhorn, G., Campbell, A.J., Cao, J., Carli, T., Chabert, E., Charlet, M., Clarke, D., Clerbaux, B., Collard, C., Contreras, J.G., Coughlan, J.A., Cousinou, M.-C., Cox, B.E., Cozzika, G., Cvach, J., Dainton, J.B., Dau, W.D., Daum, K., David, M., Davidsson, M., Delcourt, B., Demirchyan, R., De Roeck, A., De Wolf, E.A., Diaconu, C., Dixon, P., Dodonov, V., Donovan, K.T., Dowell, J.D., Droutskoi, A., Duprel, C., Ebert, J., Eckerlin, G., Eckstein, D., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Elsen, E., Erdmann, M., Fahr, A.B., Faulkner, P.J.W., Favart, L., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Ferrarotto, F., Ferron, S., Fleischer, M., Flügge, G., Fomenko, A., Foresti, I., Formánek, J., Foster, J.M., Franke, G., Gabathuler, E., Gabathuler, K., Garvey, J., Gassner, J., Gayler, J., Gerhards, R., Ghazaryan, S., Glazov, A., Goerlich, L., Gogitidze, N., Goldberg, M., Gorelov, I., Grab, C., Grässler, H., Greenshaw, T., Griffiths, R.K., Grindhammer, G., Hadig, T., Haidt, D., Hajduk, L., Haustein, V., Haynes, W.J., Heinemann, B., Heinzelmann, G., Henderson, R.C.W., Hengstmann, S., Henschel, H., Heremans, R., Herrera, G., Herynek, I., Hilgers, M., Hiller, K.H., Hilton, C.D., Hladký, J., Höting, P., Hoffmann, D., Horisberger, R., Hurling, S., Ibbotson, M., İşsever, Ç., Jacquet, M., Jaffre, M., Janauschek, L., Jansen, D.M., Janssen, X., Jönsson, L., Johnson, D.P., Jones, M., Jung, H., Kästli, H.K., Kant, D., Kapichine, M., Karlsson, M., Karschnick, O., Kaufmann, O., Kausch, M., Keil, F., Keller, N., Kenyon, I.R., Kermiche, S., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Kolanoski, H., Kolya, S.D., Korbel, V., Kostka, P., Kotelnikov, S.K., Krasny, M.W., Krehbiel, H., Kroseberg, J., Krücker, D., Krüger, K., Küpper, A., Kuhr, T., Kurča, T., Lachnit, W., Lahmann, R., Lamb, D., Landon, M.P.J., Lange, W., Lebedev, A., Lehner, F., Lemaitre, V., Lemrani, R., Lendermann, V., Levonian, S., Lindstroem, M., Lobo, G., Lobodzinska, E., Lubimov, V., Lüders, S., Lüke, D., Lytkin, L., Magnussen, N., Mahlke-Krüger, H., Malden, N., Malinovski, E., Malinovski, I., Maraček, R., Marage, P., Marks, J., Marshall, R., Martyn, H.-U., Martyniak, J., Maxfield, S.J., McMahon, T.R., Mehta, A., Meier, K., Merkel, P., Metlica, F., Meyer, A., Meyer, H., Meyer, J., Meyer, P.-O., Mikocki, S., Milstead, D., Mohr, R., Mohrdieck, S., Mondragon, M.N., Moreau, F., Morozov, A., Morris, J.V., Müller, D., Müller, K., Murı́n, P., Nagovizin, V., Naroska, B., Naumann, J., Naumann, Th., Négri, I., Newman, P.R., Nguyen, H.K., Nicholls, T.C., Niebergall, F., Niebuhr, C., Nix, O., Nowak, G., Nunnemann, T., Olsson, J.E., Ozerov, D., Panassik, V., Pascaud, C., Passaggio, S., Patel, G.D., Perez, E., Phillips, J.P., Pitzl, D., Pöschl, R., Potashnikova, I., Povh, B., Rabbertz, K., Rädel, G., Rauschenberger, J., Reimer, P., Reisert, B., Reyna, D., Riess, S., Rizvi, E., Robmann, P., Roosen, R., Rostovtsev, A., Royon, C., Rusakov, S., Rybicki, K., Sankey, D.P.C., Scheins, J., Schilling, F.-P., Schleif, S., Schleper, P., Schmidt, D., Schoeffel, L., Schörner, T., Schröder, V., Schultz-Coulon, H.-C., Sefkow, F., Shekelyan, V., Sheviakov, I., Shtarkov, L.N., Siegmon, G., Sievers, P., Sirois, Y., Sloan, T., Smirnov, P., Smith, M., Solochenko, V., Soloviev, Y., Spaskov, V., Specka, A., Spitzer, H., Stamen, R., Steinhart, J., Stella, B., Stellberger, A., Stiewe, J., Straumann, U., Struczinski, W., Sutton, J.P., Swart, M., Taševský, M., Tchernyshov, V., Tchetchelnitski, S., Thompson, G., Thompson, P.D., Tobien, N., Traynor, D., Truöl, P., Tsipolitis, G., Turnau, J., Turney, J., Tzamariudaki, E., Udluft, S., Usik, A., Valkár, S., Valkárová, A., Vallée, C., Van Haecke, A., Van Mechelen, P., Vazdik, Y., Villet, G., von Dombrowski, S., Wacker, K., Wallny, R., Walter, T., Waugh, B., Weber, G., Weber, M., Wegener, D., Wegner, A., Wengler, T., Werner, M., West, L.R., White, G., Wiesand, S., Wilksen, T., Winde, M., Winter, G.-G., Wissing, Ch., Wobisch, M., Wollatz, H., Wünsch, E., Žáček, J., Zálešák, J., Zhang, Z., Zhokin, A., Zini, P., Zomer, F., Zsembery, J., and zur Nedden, M.
Published: 1999
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13. Measurement of leading proton and neutron production in deep-inelastic scattering at HERA

Author: Adloff, C, Anderson, M, Andreev, V, Andrieu, B, Arkadov, V, Arndt, C, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Bassler, U, Bate, P, Beglarian, A, Behnke, O, Behrend, H, Beier, C, Belousov, A, Berger, C, Bernardi, G, Berndt, T, Bertrand-Coremans, G, Biddulph, P, and Bizot, J
Abstract: The production of leading neutrons, where the neutron carries a large fraction xL of the incoming proton's longitudinal momentum, is studied in deep-inelastic positron-proton scattering at HERA. The data were taken with the H1 detector in the years 2006 and 2007 and correspond to an integrated luminosity of 122 pb-1. The semi-inclusive cross section is measured in the phase space defined by the photon virtuality 6
Published: 2016

14. Di-jet event rates in deep-inelastic scattering at HERA

Author: Adloff, C, Aid, S, Anderson, M, Andreev, V, Andrieu, B, Arkadov, V, Arndt, C, Ayyaz, I, Babaev, A, Bahr, J, Ban, J, Baranov, P, Barrelet, E, Barschke, R, Bartel, T, Bassler, U, Beck, M, Behrend, H, Beier, C, Belousov, A, Berger, C, Bernardi, G, Bertrand-Coremans, G, Beyer, R, and Biddulph, P
Published: 2016

15. Multi-jet event rates in deep inelastic scattering and determination of the strong coupling constant

Author: Adloff, C, Anderson, M, Andreev, V, Andrieu, B, Arkadov, V, Arndt, C, Ayyaz, I, Babaev, A, Bahr, J, Ban, J, Baranov, P, Barrelet, E, Bartel, W, Bassler, U, Bate, P, Beck, M, Beglarian, A, Behnke, O, Behrend, H, Beier, C, Belousov, A, Berger, C, Bernardi, G, Bertrand-Coremans, G, and Biddulph, P
Abstract: Jet event rates in deep inelastic ep scattering at HERA are investigated applying the modified JADE jet algorithm. The data are corrected for detector and hadronization effects and then compared with perturbative QCD predictions using next-to-leading order calculations. The strong coupling constant αs(M2Z) is determined evaluating the jet event rates. Values of αs(Q2) are extracted in four different bins of the negative squared momentum transfer Q2 in the range from 40 GeV2 to 4000 GeV2 . A combined fit of the renormalization group equation to these several αs(Q2) values results in αs(M2Z) = 0.117 ± 0.003 (stat)+0.009-0.013 (sys) + 0.006 (jet algorithm).
Published: 2016

16. Forward pi degrees-meson production at HERA

Author: Adloff, C, Andreev, V, Andrieu, B, Arkadov, V, Astvatsatourov, A, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Bassler, U, Bate, P, Beglarian, A, Behnke, O, Beier, C, Belousov, A, Benisch, T, Berger, C, Bernardi, G, Berndt, T, Bertrand-Coremans, G, Biddulph, P, Bizot, J, and Borras, K
Published: 2016

17. A search for leptoquark bosons and lepton flavor violation in e(+)p collisions at HERA

Author: Adloff, C, Andreev, V, Andrieu, B, Arkadov, V, Astvatsatourov, A, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Bassler, U, Bate, P, Beglarian, A, Behnke, O, Behrend, H, Beier, C, Belousov, A, Berger, C, Bernardi, G, Berndt, T, Bertrand-Coremans, G, Biddulph, P, Bizot, J, and Boudry, V
Abstract: A search for new bosons possessing couplings to lepton-quark pairs is performed in the H1 experiment at HERA using 1994 to 1997 data corresponding to an integrated luminosity of 37 pb-1. First generation leptoquarks (LQs) are searched in very high Q2 neutral (NC) and charged (CC) current data samples. The measurements are compared to Standard Model (SM) expectations from deep-inelastic scattering (DIS). A deviation in the Q2 spectrum previously observed in the 1994 to 1996 dataset at Q2≳15000GeV2 remains, though with less significance. This deviation corresponded to a clustering in the invariant mass spectrum at M ≃ 200 GeV which is not observed with the 1997 dataset alone. The NC DIS data is used to constrain the Yukawa couplings λ of first generation scalar and vector LQs in the Buchmüller-Rückl-Wyler effective model. Scalar LQs are excluded for masses up to 275 GeV for a coupling of electromagnetic strength, λ = 0.3. A sensitivity to coupling values ≲ 1 is established for masses up to 400 GeV for any LQ type. The NC and CC DIS data are combined to constrain λ for arbitrary branching ratios of the LQ into eq in a generic model. For a decay branching ratio into e+u pairs as small as 10%, LQ masses up to 260 GeV are ruled out for λ = 0.3. LQs possessing couplings to mixed fermion generations, which could lead to signals of lepton flavor violation (LFV), are searched in events with a high transverse momentum μ or τ. No μ, + X or τ + X event candidate is found that is compatible with LQ kinematics. Constraints are set on the Yukawa coupling involving the μ and τ lepton in a yet unexplored mass range.
Published: 2016

18. Measurement of the inclusive di-jet cross section in photoproduction and determination of an effective parton distribution in the photon

Author: Adloff, C, Aid, S, Anderson, M, Andreev, V, Andrieu, B, Arkadov, V, Arndt, C, Ayyaz, I, Babaev, A, Bahr, J, Ban, J, Baranov, P, Barrelet, E, Barschke, R, Bartel, W, Bassler, U, Beck, M, Behrend, H, Beier, C, Belousov, A, Berger, C, Bernardi, G, Bertrand-Coremans, G, Beyer, R, and Biddulph, P
Abstract: The double-differential inclusive di-jet cross section in photoproduction processes is measured with the H1 detector at HERA. The cross section is determined as a function of the average transverse jet energy ETjets for ranges of the fractional energy xγjets of the parton from the photon side. An effective leading order parton distribution in the photon is determined at large parton fractional energies for scales between 80 < pT2 < 1250 GeV2. The measurement is compatible with the logarithmic scale dependence that is predicted by perturbative QCD.
Published: 2016

19. Elastic photoproduction of J/psi and gamma mesons at HERA

Author: Adloff, C, Andreev, V, Andrieu, B, Arkadov, V, Astvatsatourov, A, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Bassler, U, Bate, P, Beglarian, A, Behnke, O, Beier, C, Belousov, A, Benisch, T, Berger, C, Bernardi, G, Berndt, T, Bizot, J, Borras, K, Boudry, V, and Braunschweig, W
Published: 2016

20. Charged particle cross sections in photoproduction and extraction of the gluon density in the photon

Author: Adloff, C, Anderson, M, Andreev, V, Andrieu, B, Arkadov, V, Arndt, C, Ayyaz, I, Babaev, A, Bahr, J, Ban, J, Baranov, P, Barrelet, E, Bartel, W, Bassler, U, Bate, P, Beck, M, Beglarian, A, Behnke, O, Behrend, H, Beier, C, Belousov, A, Berger, C, Bernardi, G, Bertrand-Coremans, G, and Biddulph, P
Abstract: Photoproduction data collected with the H1 detector at HERA in 1994 are used to study the cross-sections for inclusive charged particle production and the structure of the photon. The differential cross-sections dσ/dp2T, for |η| < 1 in the HERA laboratory frame, and dσ/dη for PT > 2GeV/c and PT > 3 GeV/c have been measured. Model calculations of these cross-sections, based on perturbative QCD, indicate that the results are sensitive to the parton densities of the photon as well as to higher order effects, which are phenomenologically treated by multiple interactions. This sensitivity is exploited to determine the leading order cursive Greek chiγ distribution of partons in the photon using a new method based on high PT charged particles. The gluon content of the photon is extracted and found to rise with decreasing cursive Greek chiγ.
Published: 2016

21. Diffractive dijet production at HERA

Author: Adloff, C, Anderson, M, Andreev, V, Andrieu, B, Arkadov, V, Arndt, C, Ayyaz, I, Babaev, A, Bahr, J, Ban, J, Baranov, P, Barrelet, E, Barschke, R, Bartel, W, Bassler, U, Bate, P, Beck, M, Beglarian, A, Behnke, O, Behrend, H, Beier, C, Belousov, A, Berger, C, Bernardi, G, and Bertrand-Coremans, G
Abstract: Interactions of the type ep → eXY are studied, where the component X of the hadronic final state contains two jets and is well separated in rapidity from a leading baryonic system Y. Analyses are performed of both resolved and direct photoproduction and of deep-inelastic scattering with photon virtualities in the range 7.5 < Q2 < 80 GeV2. Cross sections are presented where Y has mass MY < 1.6 GeV, the squared four-momentum transferred at the proton vertex satisfies \t\ < 1 GeV2 and the two jets each have transverse momentum pjetT > 5 GeV relative to the photon direction in the rest frame of X. Models based on a factorisable diffractive exchange with a gluon dominated structure, evolved to a scale set by the transverse momentum p̂T of the outgoing partons from the hard interaction, give good descriptions of the data. Exclusive qq̄ production, as calculated in perturbative QCD using the squared proton gluon density, represents at most a small fraction of the measured cross section. The compatibility of the data with a breaking of diffractive factorisation due to spectator interactions in resolved photoproduction is investigated.
Published: 2016

22. Differential (2+1) jet event rates and determination of alpha(s) in deep inelastic scattering at HERA

Author: Adloff, C, Anderson, M, Andreev, V, Andrieu, B, Arkadov, V, Ayyaz, I, Babaev, A, Bahr, J, Ban, J, Baranov, P, Barrelet, E, Barschke, R, Bartel, W, Bassler, U, Bate, P, Beck, M, Beglarian, A, Behnke, O, Behrend, H, Beier, C, Belousov, A, Berger, C, Bernardi, G, Bertrand-Coremans, G, and Biddulph, P
Abstract: Events with a (2+1) jet topology in deep-inelastic scattering at HERA are studied in the kinematic range 200 < Q2 < 10 000 GeV2. The rate of (2+1) jet events has been determined with the modified JADE jet algorithm as a function of the jet resolution parameter and is compared with the predictions of Monte Carlo models. In addition, the event rate is corrected for both hadronization and detector effects and is compared with next-to-leading order QCD calculations. A value of the strong coupling constant of αs(M2Z)=0.118±0.002 (stat.) +0.007-0.008 (syst.) +0.007-0.006 (theory) is extracted. The systematic error includes uncertainties in the calorimeter energy calibration, in the description of the data by current Monte Carlo models, and in the knowledge of the parton densities. The theoretical error is dominated by the renormalization scale ambiguity.
Published: 2016

23. Charmonium production in deep inelastic scattering at HERA

Author: Adloff, C, Andreev, V, Andrieu, B, Arkadov, V, Astvatsatourov, A, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Bassler, U, Bate, P, Beglarian, A, Behnke, O, Behrend, H, Beier, C, Belousov, A, Berger, C, Bernardi, G, Berndt, T, Bertrand-Coremans, G, Biddulph, P, Bizot, J, and Boudry, V
Abstract: The electroproduction of J/ψ and ψ(2S) mesons is studied in elastic, quasi-elastic and inclusive reactions for four momentum transfers 2 < Q2 < 80 GeV2 and photon-proton centre of mass energies 25 < W < 180 GeV. The data were taken with the H1 detector at the electron proton collider HERA in the years 1995 to 1997. The total virtual photon-proton cross section for elastic J/ψ production is measured as a function of Q2 and W. The dependence of the production rates on the square of the momentum transfer from the proton (t) is extracted. Decay angular distributions are analysed and the ratio of the longitudinal and transverse cross sections is derived. The ratio of the cross sections for quasi-elastic ψ(2S) and J/ψ meson production is measured as a function of Q2. The results are discussed in terms of theoretical models based upon perturbative QCD. Differential cross sections for inclusive and inelastic production of J/ψ mesons are determined and predictions within two theoretical frameworks are compared with the data, the non-relativistic QCD factorization approach including colour octet and colour singlet contributions, and the model of Soft Colour Interactions.
Published: 2016

24. Multiplicity structure of the hadronic final state in diffractive deep-inelastic scattering at HERA

Author: Adloff, C, Anderson, M, Andreev, V, Andrieu, B, Arkadov, V, Ayyaz, I, Babaev, A, Bahr, J, Ban, J, Baranov, P, Barrelet, E, Barschke, R, Bartel, W, Bassler, U, Bate, P, Beck, M, Beglarian, A, Behrend, H, Beier, C, Belousov, A, Berger, C, Bernardi, G, Bertrand-Coremans, G, Biddulph, P, and Bizot, J
Abstract: The multiplicity structure of the hadronic system X produced in deep-inelastic processes at HERA of the type ep → eXY, where Y is a hadronic system with mass MY < 1.6 GeV and where the squared momentum transfer at the pY vertex, t, is limited to \t\ < 1 GeV2, is studied as a function of the invariant mass Mx of the system X. Results are presented on multiplicity distributions and multiplicity moments, rapidity spectra and forward-backward correlations in the centre-of-mass system of X. The data are compared to results in e+ e- annihilation, fixed-target lepton-nucleon collisions, hadro-produced diffractive final states and to non-diffractive hadron-hadron collisions. The comparison suggests a production mechanism of virtual photon dissociation which involves a mixture of partonic states and a significant gluon content. The data are well described by a model, based on a QCD-Regge analysis of the diffractive structure function, which assumes a large hard gluonic component of the colourless exchange at low Q2. A model with soft colour interactions is also successful. a Supported by the Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie, FRG, under contract numbers 7AC17P, 7AC47P, 7DO55P, 7HH17I, 7HH27P, 7HD17P, 7HD27P, 7KI17I, 6MP17I and 7WT87P b Supported by the UK Particle Physics and Astronomy Research Council, and formerly by the UK Science and Engineering Research Council c Supported by PNRS-NFWO, IISN-IIKW.
Published: 2016

25. Inclusive photoproduction of neutral pions in the photon hemisphere at HERA

Author: Adloff, C, Andreev, V, Andrieu, B, Arkadov, V, Astvatsatourov, A, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Bassler, U, Bate, P, Beglarian, A, Behnke, O, Beier, C, Belousov, A, Benisch, T, Berger, C, Bernardi, G, Berndt, T, Bertrand-Coremans, G, Bizot, JC, Borras, K, Boudry, V, Braunschweig, W, Brisson, V, Broker, HB, Brown, DP, Bruckner, W, Bruel, P, Bruncko, D, Burger, J, Busser, FW, Bunyatyan, A, Burkhardt, H, Burrage, A, Buschhorn, G, Campbell, AJ, Cao, J, Carli, T, Caron, S, Chabert, E, Clarke, D, Clerbaux, B, Collard, C, Contreras, JG, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, David, M, Davidsson, M, Delcourt, B, Delerue, N, Demirchyan, R, De Roeck, A, De Wolf, EA, Diaconu, C, Dixon, P, Dodonov, V, Donovan, KT, Dowell, JD, Droutskoi, A, Duprel, C, Ebert, J, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Ellerbrock, M, Elsen, E, Erdmann, M, Faulkner, PJW, Favart, L, Fedotov, A, Felst, R, Ferencei, J, Ferrarotto, F, Ferron, S, Fleischer, M, Flugge, G, Fomenko, A, Foresti, I, Formanek, J, Foster, JM, Franke, G, Gabathuler, E, Gabathuler, K, Garvey, J, Gassner, J, Gayler, J, Gerhards, R, Ghazaryan, S, Glazov, A, Goerlich, L, Gogitidze, N, Goldberg, M, Goodwin, C, Grab, C, Grassler, H, Greenshaw, T, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Haustein, V, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, R, Herrera, G, Herynek, I, Hilgers, M, Hiller, KH, Hilton, CD, Hladky, J, Hoting, P, Hoffmann, D, Hoprich, W, Horisberger, R, Hurling, S, Ibbotson, M, Issever, C, Jacquet, M, Jaffre, M, Janauschek, L, Jansen, DM, Janssen, X, Jemanov, V, Jonsson, L, Johnson, DP, Jones, MAS, Jung, H, Kastli, HK, Kant, D, Kapichine, M, Karlsson, M, Karschnick, O, Kaufmann, O, Kausch, M, Keil, F, Keller, N, Kennedy, J, Kenyon, IR, Kermiche, S, Kiesling, C, Klein, M, Kleinwort, C, Knies, G, Koblitz, B, Kolanoski, H, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Krasny, MW, Krehbiel, H, Kroseberg, J, Krucker, D, Kruger, K, Kupper, A, Kuhr, T, Kurca, T, Kutuev, R, Lachnit, W, Lahmann, R, Lamb, D, Landon, MPJ, Lange, W, Lastovicka, T, Lebedev, A, Leissner, B, Lemaitre, V, Lemrani, R, Lendermann, V, Levonian, S, Lindstroem, M, Lobo, G, Lobodzinska, E, Lobodzinski, B, Loktionova, N, Lubimov, V, Luders, S, Luke, D, Lytkin, L, Magnussen, N, Mahlke-Kruger, H, Malden, N, Malinovski, E, Malinovski, I, Maracek, R, Marage, P, Marks, J, Marshall, R, Martyn, HU, Martyniak, J, Maxfield, SJ, Mehta, A, Meier, K, Merkel, P, Metlica, F, Meyer, A, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Mkrtchyan, T, Mohr, R, Mohrdieck, S, Mondragon, MN, Moreau, F, Morozov, A, Morris, JV, Muller, D, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, J, Naumann, T, Negri, I, Nellen, G, Newman, PR, Nicholls, TC, Niebergall, F, Niebuhr, C, Nix, O, Nowak, G, Nunnemann, T, Olsson, JE, Ozerov, D, Panassik, V, Pascaud, C, Passaggio, S, Patel, GD, Perez, E, Phillips, JP, Pitzl, D, Poschl, R, Potachnikova, I, Povh, B, Rabbertz, K, Radel, G, Rauschenberger, J, Reimer, P, Reisert, B, Reyna, D, Riess, S, Rizvi, E, Robmann, P, Roosen, R, Rostovtsev, A, Royon, C, Rusakov, S, Rybicki, K, Sankey, DPC, Scheins, J, Schilling, FP, Schleif, S, Schleper, P, Schmidt, D, Schoeffel, L, Schoning, A, Schorner, T, Schroder, V, Schultz-Coulon, HC, Sedlak, K, Sefkow, F, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Siegmon, G, Sievers, P, Sirois, Y, Sloan, T, Smirnov, P, Smith, M, Solochenko, V, Soloviev, Y, Spaskov, V, Specka, A, Spitzer, H, Stamen, R, Steinhart, J, Stella, B, Stellberger, A, Stiewe, J, Straumann, U, Struczinski, W, Sutton, JP, Swart, M, Tasevsky, M, Tchernyshov, V, Tchetchelnitski, S, Thompson, G, Thompson, PD, Tobien, N, Traynor, D, Truol, P, Tsipolitis, G, Turnau, J, Turney, JE, Tzamariudaki, E, Udluft, S, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Mechelen, P, Vazdik, Y, von Dombrowski, S, Wacker, K, Wallny, R, Walter, T, Waugh, B, Weber, G, Weber, M, Wegener, D, Wegner, A, Wengler, T, Werner, M, White, G, Wiesand, S, Wilksen, T, Winde, M, Winter, GG, Wissing, C, Wobisch, M, Wollatz, H, Wunsch, E, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zomer, F, Zsembery, J, zur Nedden, M, Collaboration, H, 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), 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, Particle physics, Photon, Physics and Astronomy (miscellaneous), Meson, 010308 nuclear & particles physics, Monte Carlo method, FOS: Physical sciences, Context (language use), HERA, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), symbols.namesake, Pion, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], symbols, Feynman diagram, High Energy Physics::Experiment, Rapidity, Nuclear Experiment, 010306 general physics, Engineering (miscellaneous)
Abstract: The inclusive cross section for the photoproduction of neutral pions has been measured as a function of the transverse momentum, rapidity, and Feynman x of the pizero mesons at an average photon--proton centre-of-mass energy of 208 GeV and for photon virtualities below Q^2=0.01 GeV^2. The pizero measurement extends the range covered by previous charged particle measurements at HERA by two units of rapidity in the photon direction down to a value of -5.5 in the gamma p centre-of-mass frame. The pizero transverse momentum distribution is well described over the whole measured range by a power law ansatz, while an exponential fit falls below the data at transverse momentum values above 1.5 GeV/c. Good agreement with the predictions of the Monte Carlo models PYTHIA and PHOJET is found. In the context of the PYTHIA model the data are inconsistent with large intrinsic transverse momentum values in the photon., 20 pages, 6 figures and 3 tables
Published: 2000

26. Measurement of dijet cross-sections in low ${\rm Q}^2$ ep collisions and the extraction of an effective parton density for the virtual photon

Author: Adloff, C, Andreev, V, Andrieu, B, Arkadov, V, Astvatsatourov, A, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, T, Bassler, U, Bate, P, Beglarian, A, Behnke, O, Behrend, HJ, Beier, C, Belousov, A, Berger, C, Bernardi, G, Berndt, T, Bertrand-Coremans, G, Biddulph, P, Bizot, JC, Boudry, V, Braunschweig, W, Brisson, V, Brown, DP, Bruckner, W, Bruel, P, Bruncko, D, Burger, J, Busser, FW, Buniatian, A, Burke, S, Burrage, A, Buschhorn, G, Calvet, D, Campbell, AJ, Carli, T, Chabert, E, Charlet, M, Chyla, J, Clarke, D, Clerbaux, B, Contreras, JG, Cormack, C, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, David, M, Davidsson, M, De Roeck, A, De Wolf, EA, Delcourt, B, Demirchyan, R, Diaconu, C, Dirkmann, M, Dixon, P, Dlugosz, W, Donovan, KT, Dowell, JD, Droutskoi, A, Ebert, J, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Elsen, E, Enzenberger, M, Erdmann, M, Fahr, AB, Faulkner, PJW, Favart, L, Fedotov, A, Felst, R, Feltesse, J, Ferencei, J, Ferrarotto, F, Fleischer, M, Flugge, G, Fomenko, A, Formanek, J, Foster, JM, Franke, G, Gabathuler, E, Gabathuler, K, Gaede, F, Garvey, J, Gassner, J, Gayler, J, Gerhards, R, Ghazaryan, S, Glazov, A, Goerlich, L, Gogitidze, N, Goldberg, M, Gorelov, I, Grab, C, Grassler, H, Greenshaw, T, Griffiths, RK, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Hampel, M, Haustein, V, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, R, Herynek, I, Hewitt, K, Hiller, KH, Hilton, CD, Hladky, J, Hoffmann, D, Horisberger, R, Hurling, S, Ibbotson, M, Issever, C, Jacquet, M, Jaffre, M, Janauschek, L, Jansen, DM, Jonsson, L, Johnson, DP, Jones, M, Jung, H, Kastli, HK, Kander, M, Kant, D, Kapichine, M, Karlsson, M, Karschnik, O, Katzy, J, Kaufmann, O, Kausch, M, Keller, N, Kenyon, IR, Kermiche, S, Keuker, C, Kiesling, C, Klein, M, Kleinwort, C, Knies, G, Kohne, JH, Kolanoski, H, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Kramerkamper, T, Krasny, MW, Krehbiel, H, Krucker, D, Kruger, K, Kupper, A, Kuster, H, Kuhlen, M, Kurca, T, Lachnit, W, Lahmann, R, Lamb, D, Landon, MPJ, Lange, W, Langenegger, U, Lebedev, A, Lehner, F, Lemaitre, V, Lemrani, R, Lendermann, V, Levonian, S, Lindstroem, M, Lobo, G, Lobodzinska, E, Lubimov, V, Luders, S, Luke, D, Lytkin, L, Magnussen, N, Mahlke-Kruger, H, Malden, N, Malinovski, E, Malinovski, I, Maracek, R, Marage, P, Marks, J, Marshall, R, Martyn, HU, Martyniak, J, Maxfield, SJ, McMahon, TR, Mehta, A, Meier, K, Merkel, P, Metlica, F, Meyer, A, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Mohr, R, Mohrdieck, S, Mondragon, M, Moreau, F, Morozov, A, Morris, JV, Muller, D, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, J, Naumann, T, Negri, I, Newman, PR, Nguyen, HK, Nicholls, TC, Niebergall, F, Niebuhr, C, Niedzballa, C, Niggli, H, Nix, O, Nowak, G, Nunnemann, T, Oberlack, H, Olsson, JE, Ozerov, D, Palmen, P, Panassik, V, Pascaud, C, Passaggio, S, Patel, GD, Pawletta, H, Perez, E, Phillips, JP, Pieuchot, A, Pitzl, D, Poschl, R, Pope, G, Povh, B, Rabbertz, K, Rauschenberger, J, Reimer, P, Reisert, B, Reyna, D, Rick, H, Riess, S, Rizvi, E, Robmann, P, Roosen, R, Rosenbauer, K, Rostovtsev, A, Rouse, F, Royon, C, Rusakov, S, Rybicki, K, Sankey, DPC, Schacht, P, Scheins, J, Schilling, FP, Schleif, S, Schleper, P, Schmidt, D, Schoeffel, L, Schroder, V, Schultz-Coulon, HC, Sefkow, F, Semenov, A, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Siegmon, G, Sirois, Y, Sloan, T, Smirnov, P, Smith, M, Solochenko, V, Soloviev, Y, Spaskov, V, Specka, A, Spitzer, H, Squinabol, F, Stamen, R, Steffen, P, Steinberg, R, Steinhart, J, Stella, B, Stellberger, A, Stiewe, J, Straumann, U, Struczinski, W, Sutton, JP, Swart, M, Tapprogge, S, Tasevsky, M, Tchernyshov, V, Tchetchelnitski, S, Theissen, J, Thompson, G, Thompson, PD, Tobien, N, Todenhagen, R, Traynor, D, Truol, P, Tsipolitis, G, Turnau, J, Tzamariudaki, E, Udluft, S, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Esch, P, Van Haecke, A, Van Mechelen, P, Vazdik, Y, Villet, G, Wacker, K, Wallny, R, Walter, T, Waugh, B, Weber, G, Weber, M, Wegener, D, Wegner, A, Wengler, T, Werner, M, West, LR, White, G, Wiesand, S, Wilksen, T, Willard, S, Winde, M, Winter, GG, Wissing, C, Wittek, C, Wittmann, E, Wobisch, M, Wollatz, H, Wunsch, E, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zini, P, Zomer, F, Zsembery, J, zur Nedden, M, and Collaboration, H
Subjects: Physics, Particle physics, Physics and Astronomy (miscellaneous), High Energy Physics::Phenomenology, Order (ring theory), Virtual particle, Elementary particle, Parton, HERA, Nuclear physics, Massless particle, Cover (topology), High Energy Physics::Experiment, Nuclear Experiment, Engineering (miscellaneous), Energy (signal processing)
Abstract: The triple-differential dijet cross-section, ${\rm d}^3 \sigma_{ep}/{\rm d} Q^2{\rm d} \overline{E_t}^2 {\rm d}x^{jets}_\gamma$, is measured with the H1 detector at HERA as a function of the photon virtuality $Q^2$, the fraction of the photon's momentum carried by the parton entering the hard scattering, $\x^{jets}_\gamma$, and the square of the mean transverse energy, $\overline{E_t}^2$, of the two highest $E_t$ jets. Jets are found using a longitudinal boost-invariant $k_T$ clustering algorithm in the $\gamma^* p$ center of mass frame. The measurements cover the ranges $1.6 < Q^2 < 80$ GeV$^2$ in virtuality and $0.1 < y < 0.7$ in inelasticity y. The results are well described by leading order QCD models which include the effects of a resolved component to the virtual photon. Models which treat the photon as point-like fail to describe the data. An effective leading order parton density for the virtual photon is extracted as a function of the photon virtuality, the probing scale and the parton momentum fraction. The $x_{\gamma}$ and probing scale dependences of the parton density show characteristic features of photon structure, and a suppression of this structure with increasing $Q^2$ is seen.
Published: 2000

27. Bose-Einstein correlations in deep inelastic $ep$ scattering at HERA

Author: Adloff, C., Aid, S., Anderson, M., Andreev, V., Andrieu, B., Arkadov, V., Arndt, C., Ayyaz, I., Babaev, A., Bähr, J., Bán, J., Ban, Y., Baranov, P., Barrelet, E., Barschke, R., Bartel, W., Bassler, U., Beck, H. P., Beck, M., Behrend, H. -J, Belousov, A., Berger, Ch, Bernardi, G., Bertrand-Coremans, G., Beyer, R., Biddulph, P., Bispham, P., Bizot, J. C., Boiras, K., Botterweck, F., Boudry, V., Bourov, S., Braemer, A., Braunschweig, W., Brisson, V., Brückner, W., Bruel, P., Bruncko, D., Brune, C., Buchholz, R., Bungener, L., Bürger, J., Büsser, F. W., Buniatian, A., Burke, S., Burton, M. J., Buschhorn, G., Calvet, D., Campbell, A. J., Carli, T., Charlet, M., Clarke, D., Clerbaux, B., Cocks, S., Contreras, J. G., Cormack, C., Coughlan, J. A., Courau, A., Cousinou, M. -C, Cox, B. E., Cozzika, G., Cussans, D. G., Cvach, J., Dagoret, S., Dainton, J. B., Dau, W. D., Daum, K., David, M., Davis, C. L., Roeck, A., Wolf, E. A., Delcourt, B., Dirkmann, M., Dixon, P., Dlugosz, W., Dollfus, C., Donovan, K. T., Dowell, J. D., Dreis, H. B., Droutskoi, A., Ebert, J., Ebert, T. R., Eckerlin, G., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Elsen, E., Erdmann, M., Fahr, A. B., Favart, L., Fedotov, A., Feist, R., Feltesse, J., Ferencei, J., Ferrarotto, F., Flamm, K., Fleischer, M., Flieser, M., Flügge, G., Fomenko, A., Formánek, J., Foster, J. M., Franke, G., Gabathuler, E., Gabathuler, K., Gaede, F., Garvey, J., Gayler, J., Gebauer, M., Genzel, H., Gerhards, R., Glazov, A., Goerlich, L., Gogitidze, N., Goldberg, M., Goldner, D., Krzysztof Golec-Biernat, Gonzalez-Pineiro, B., Gorelov, I., Grab, C., Grässler, H., Greenshaw, T., Griffiths, R. K., Grindhammer, G., Gruber, A., Gruber, C., Hadig, T., Haidt, D., Hajduk, L., Haller, T., Hampel, M., Haynes, W. J., Heinemann, B., Heinzelmann, G., Henderson, R. C. W., Henschel, H., Herynek, I., Hess, M. F., Hewitt, K., Hiller, K. H., Hilton, C. D., Hladký, J., Höppner, M., Hoffmann, D., Holtom, T., Horisberger, R., Hudgson, V. L., Hütte, M., Ibbotson, M., Işsever, Ç, Itterbeck, H., Jacholkowska, A., Jacobsson, C., Jacquet, M., Jaffre, M., Janoth, J., Jansen, D. M., Jönsson, L., Johnson, D. P., Jung, H., Kalmus, P. I. P., Kander, M., Kant, D., Kathage, U., Katzy, J., Kaufmann, H. H., Kaufmann, O., Kausch, M., Kazarian, S., Kenyon, I. R., Kermiche, S., Keuker, C., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Köhler, T., Könne, J. H., Kolanoski, H., Kolya, S. D., Korbel, V., Kostka, P., Kotelnikov, S. K., Krämerkämper, T., Krasny, M. W., Krehbiel, H., Krücker, D., Küpper, A., Küster, H., Kuhlen, M., Kurča, T., Kurzhöfer, J., Laforge, B., Landon, M. P. J., Lange, W., Langenegger, U., Lebedev, A., Lehner, F., Lemaitre, V., Levonian, S., Lindstroem, M., Linsel, F., Lipinski, J., List, B., Lobo, G., Lomas, J. W., Lopez, G. C., Lubimov, V., Lüke, D., Lytkin, L., Magnussen, N., Mahlke-Krüger, H., Malinovski, E., Maraček, R., Marage, P., Marks, J., Marshall, R., Martens, J., Martin, G., Martin, R., Martyn, H. -U, Martyniak, J., Mavroidis, T., Maxfield, S. J., Mcmahon, S. J., Mehta, A., Meier, K., Merkel, P., Metlica, F., Meyer, A., Meyer, H., Meyer, J., Meyer, P. -O, Migliori, A., Mikocki, S., Milstead, D., Moeck, J., Moreau, F., Morris, J. V., Mroczko, E., Müller, D., Walter, T., Müller, K., Murín, P., Nagovizin, V., Nahnhauer, R., Naroska, B., Naumann, Th, Négri, I., Newman, P. R., Newton, D., Nguyen, H. K., Nicholls, T. C., Niebergall, F., Niebuhr, C., Niedzballa, Ch, Niggli, H., Nowak, G., Nunnemann, T., Nyberg-Werther, M., Oberlack, H., Olsson, J. E., Ozerov, D., Palmen, P., Panaro, E., Panitch, A., Pascaud, C., Passaggio, S., Patel, G. D., Pawletta, H., Peppel, E., Perez, E., Phillips, J. P., Pieuchot, A., Pitzl, D., Pöschl, R., Pope, G., Povh, B., Prell, S., Rabbertz, K., Rädel, G., Riedlberger, J., Reimer, P., Rick, H., Riess, S., Rizvi, E., Robmann, P., Roosen, R., Rosenbauer, K., Rostovtsev, A., Rouse, F., Royon, C., Rüter, K., Rusakov, S., Rybicki, K., Sankey, D. P. C., Schacht, P., Schiek, S., Schleif, S., Schleper, P., Schlippe, W., Schmidt, D., Schmidt, G., Schoeffel, L., Schöning, A., Schröder, V., Schuhmann, E., Schwab, B., Sefkow, F., Semenov, A., Shekelyan, V., Sheviakov, I., Shtarkov, L. N., Siegmon, G., Siewert, U., Sirois, Y., Skillicorn, I. O., Sloan, T., Smirnov, P., Smith, M., Solochenko, V., Soloviev, Y., Specka, A., Spiekermann, J., Spielman, S., Spitzer, H., Squinabol, F., Steffen, P., Steinberg, R., Steinhart, J., Stella, B., Stellberger, A., Stier, J., Stiewe, J., Stößlein, U., Stolze, K., Straumann, U., Struczinski, W., Sutton, J. P., Tapprogge, S., Taševský, M., Tchernyshov, V., Tchetchelnitski, S., Theissen, J., Thompson, G., Thompson, P. D., Tobien, N., Todenhagen, R., Truöl, P., Tsipolitis, G., Turnau, J., Tzamariudaki, E., Uelkes, P., Usik, A., Valkár, S., Valkárová, A., Vallée, C., Esch, P., Mechelen, P., Vandenplas, D., Vazdik, Y., Verrecchia, P., Villet, G., Wacker, K., Wagener, A., Wagener, M., Wallny, R., Waugh, B., Weber, G., Weber, M., Wegener, D., Wegner, A., Wengler, T., Werner, M., West, L. R., Wiesand, S., Wilksen, T., Willard, S., Winde, M., Winter, G. -G, Wittek, C., Wobisch, M., Wollatz, H., Wünsch, E., Žáček, J., Zarbock, D., Zhang, Z., Zhokin, A., Zini, P., Zomer, F., Zsembery, J., Zur Nedden, M., 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, Particle physics, Annihilation, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Scattering, FOS: Physical sciences, Bose–Einstein correlations, HERA, Inelastic scattering, 01 natural sciences, Charged particle, High Energy Physics - Experiment, Hadronization, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Invariant mass, Nuclear Experiment, 010306 general physics
Abstract: Two-particle correlations in invariant mass are studied separately for like-sign and unlike-sign charged particles produced in deep inelastic positron-proton scattering in a new kinematical domain. The data were taken with the H1 detector at the HERA storage ring in 1994, in which 27.5 GeV positrons collided with 820 GeV protons at a centre of mass energy sqrt{s}=300 GeV. The observed enhancement of the like-sign correlations at low invariant masses is related to the dimensions of the hadronic source. The data are compared to different QCD models where the hadronization is performed with the string-fragmentation model. Results are presented for the first time separately for diffractive and non-diffractive scattering, in domains of four-momentum transfer, Bjorken-x, and hadronic center of mass energy, and in intervals of charged particle multiplicity. The observed source radii do not differ strongly from those measured in lower energy lepton-nucleon inelastic scattering, and e^+e^- annihilation., 36 pages, 10 Figures
Published: 1997

28. Deep-Inelastic inclusive ep Scattering at low x and a determination of $\alpha s$

Author: Adloff, C, Andreev, V, Andrieu, B, Anthonis, T, Arkadov, V, Astvatsatourov, A, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Bassler, U, Bate, P, Beglarian, A, Behnke, O, Beier, C, Belousov, A, Benisch, T, Bergen, C, Bernardi, G, Berndt, T, Bizot, JC, Boudry, V, Braunschweig, W, Brisson, V, Broker, HB, Brown, DP, Bruckner, W, Bruel, P, Bruncko, D, Burger, J, Busser, FW, Bunyatyan, A, Burkhardt, H, Burrage, A, Buschhorn, G, Campbell, AJ, Cao, J, Carli, T, Caron, S, Chabert, E, Clarke, D, Clerbaux, B, Collard, C, Contreras, JG, Coppens, YR, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, Davidsson, M, Delcourt, B, Delerue, N, Demirchyan, R, De Roeck, A, De Wolf, EA, Diaconu, C, Dixon, P, Dodonov, V, Dowell, JD, Droutskoi, A, Duprel, C, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Ellerbrock, A, Elsen, E, Erdmann, M, Erdmann, W, Faulkner, PJW, Favart, L, Fedotov, A, Felst, R, Ferencei, J, Ferron, S, Fleischer, M, Fleming, YH, Flugge, G, Fomenko, A, Foresti, I, Formanek, J, Foster, JM, Franke, G, Gabathuler, E, Gabathuler, K, Garvey, J, Gassner, J, Gayler, J, Gerhards, R, Ghazaryan, S, Glazov, A, Goerlich, L, Gogitidze, N, Goldberg, M, Goodwin, C, Grab, C, Grassler, H, Greenshaw, T, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, R, Herrera, G, Herynek, I, Hildebrandt, M, Hilgers, M, Hiller, KH, Hladky, J, Hoting, P, Hoffmann, D, Hoprich, W, Horisberger, R, Hurling, S, Ibbotson, M, Issever, C, Jacquet, M, Jaffre, M, Janauschek, L, Jansen, DM, Janssen, X, Jemanov, V, Jonsson, L, Johnson, DP, Jones, MAS, Jung, H, Kastli, HK, Kant, D, Kapichine, M, Karlsson, M, Karschnick, O, Keil, F, Keller, N, Kennedy, J, Kenyon, IR, Kermiche, S, Kiesling, C, Klein, M, Kleinwort, C, Knies, G, Koblitz, B, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Koutouev, R, Koutov, A, Krasny, MW, Krehbiel, H, Kroseberg, J, Kruger, K, Kupper, A, Kuhr, T, Kurca, T, Lahmann, R, Lamb, D, Landon, MPJ, Lange, W, Lastovicka, T, Lebailly, E, Lebedev, A, Leissner, B, Lemrani, R, Lendermann, V, Levonian, S, Lindstroem, M, List, B, Lobodzinska, E, Lobodzinski, B, Loginov, A, Loktionova, N, Lubimov, V, Luders, S, Luke, D, Lytkin, L, Magnussen, N, Mahlke-Kruger, H, Malden, N, Malinovski, E, Malinovski, I, Maracek, R, Marage, P, Marks, J, Marshall, R, Martyn, HU, Martyniak, J, Maxfield, SJ, Mehta, A, Meier, K, Merkel, P, Metlica, F, Meyer, AB, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Mkrtchyan, T, Mohr, R, Mohrdieck, S, Mondragon, MN, Moreau, F, Morozov, A, Morris, JV, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, J, Naumann, T, Nellen, G, Newman, PR, Nicholls, TC, Niebergall, F, Niebuhr, C, Nix, O, Nowak, G, Nunnemann, T, Olsson, JE, Ozerov, D, Panassik, V, Pascaud, C, Patel, GD, Perez, E, Phillips, JP, Pitzl, D, Poschl, R, Potachnikova, I, Povh, B, Rabbertz, K, Radel, G, Rauschenberger, J, Reimer, P, Reisert, B, Reyna, D, Riess, S, Risler, C, Rizvi, E, Robmann, P, Roosen, R, Rostovtsev, A, Royon, C, Rusakov, S, Rybicki, K, Sankey, DPC, Scheins, J, Schilling, FP, Schleper, P, Schmidt, D, Schmitt, S, Schoeffel, L, Schoning, A, Schorner, T, Schroder, V, Schultz-Coulon, HC, Schwanenberger, C, Sedlak, K, Sefkow, F, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Siegmon, G, Sievers, P, Sirois, Y, Sloan, T, Smirnov, P, Solochenko, V, Soloviev, Y, Spaskov, V, Specka, A, Spitzer, H, Stamen, R, Steinhart, J, Stella, B, Stellberger, A, Stiewe, J, Straumann, U, Struczinski, W, Swart, M, Tasevsky, M, Tchernyshov, V, Tchetchelnitski, S, Thompson, G, Thompson, PD, Tobien, N, Traynor, D, Truol, P, Tsipolitis, G, Tsurin, I, Turnau, J, Turney, JE, Tzamariudaki, E, Udluft, S, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Mechelen, P, Vassiliev, S, Vazdik, Y, Vichnevski, A, von Dombrowski, S, Wacker, K, Wallny, R, Walter, T, Waugh, B, Weber, G, Weber, M, Wegener, D, Werner, M, White, G, Wiesand, S, Wilksen, T, Winde, M, Winter, GG, Wissing, C, Wobisch, M, Wollatz, H, Wunsch, E, Wyatt, AC, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zomer, F, Zsembery, J, zur Nedden, M, Collaboration, H, 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), 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 Kerec, Hélène
Subjects: Physics, Quantum chromodynamics, Particle physics, Luminosity (scattering theory), Physics and Astronomy (miscellaneous), Proton, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], 010308 nuclear & particles physics, Scattering, FOS: Physical sciences, HERA, 01 natural sciences, Gluon, High Energy Physics - Experiment, Momentum, High Energy Physics - Experiment (hep-ex), DGLAP, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, Engineering (miscellaneous)
Abstract: A precise measurement of the inclusive deep-inelastic e^+p scattering cross section is reported in the kinematic range 1.5, 68 pages, 24 figures and 18 tables
Published: 2001

29. Dijet Production in Charged and Neutral Current $e^{+}p$ Interactions at High $Q^{2}$

Author: Adloff, C., Andreev, V., Andrieu, B., Anthonis, T., Arkadov, V., Astvatsatourov, A., Ayyaz, I., Babaev, A., Bähr, J., Baranov, P., Barrelet, E., Bartel, W., Bate, P., Beglarian, A., Behnke, O., Beier, C., Belousov, A., Benisch, T., Berger, Ch, Berndt, T., Bizot, J. C., Boudry, V., Braunschweig, W., Brisson, V., Bröker, H. -B, Brown, D. P., Bräckner, W., Bruel, P., Bruncko, D., Bürger, J., Büsser, F. W., Bunyatyan, A., Burkhardt, H., Burrage, A., Buschhorn, G., Campbell, A. J., Jun Cao, Carli, T., Caron, S., Chabert, E., Clarke, D., Clerbaux, B., Collard, C., Contreras, J. G., Coppens, Y. R., Coughlan, J. A., Cousinou, M. -C, Cox, B. E., Cozzika, G., Cvach, J., Dainton, J. B., Dau, W. D., Daum, K., Davidsson, M., Delcourt, B., Delerue, N., Demirchyan, R., Roeck, A., Wolf, E. A., Diaconu, C., Dixon, P., Dodonov, V., Dowell, J. D., Droutskoi, A., Duprel, C., Eckerlin, G., Eckstein, D., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Ellerbrock, M., Elsen, E., Erdmann, M., Erdmann, W., Faulkner, P. J. W., Favart, L., Fedotov, A., Felst, R., Ferencei, J., Ferron, S., Fleischer, M., Fleming, Y. H., Flügge, G., Fomenko, A., Foresti, I., Formánek, J., Foster, J. M., Franke, G., Gabathuler, E., Gabathuler, K., Garvey, J., Gassner, J., Gayler, J., Gerhards, R., Ghazaryan, S., Goerlich, L., Gogitidze, N., Goldberg, M., Goodwin, C., Grab, C., Grässler, H., Greenshaw, T., Grindhammer, G., Hadig, T., Haidt, D., Hajduk, L., Haynes, W. J., Heinemann, B., Heinzelmann, G., Henderson, R. C. W., Hengstmann, S., Henschel, H., Heremans, R., Herrera, G., Herynek, I., Hildebrandt, M., Hilgers, M., Hiller, K. H., Hladký, J., Höting, P., Hoffmann, D., Horisberger, R., Hurling, S., Ibbotson, M., Işsever, C., Jacquet, M., Jaffre, M., Janauschek, L., Jansen, D. M., Janssen, X., Jemanov, V., Jönsson, L., Johnson, D. P., Jones, M. A. S., Jung, H., Kästli, H. K., Kant, D., Kapichine, M., Karlsson, M., Karschnick, O., Keil, F., Keller, N., Kennedy, J., Kenyon, I. R., Kermiche, S., Kiesling, C., Kjellberg, P., Klein, M., Kleinwort, C., Knies, G., Koblitz, B., Kolya, S. D., Korbel, V., Kostka, P., Kotelnikov, S. K., Koutouev, R., Koutov, A., Krasny, M. W., Krehbiel, H., Kroseberg, J., Krüger, K., Küpper, A., Kuhr, T., Kurča, T., Lahmann, R., Lamb, D., Landon, M. P. J., Lange, W., Laštovička, T., Laycock, P., Lebailly, E., Lebedev, A., Leißner, B., Lemrani, R., Lendermann, V., Levonian, S., Lindstroem, M., List, B., Lobodzinska, E., Lobodzinski, B., Loginov, A., Loktionova, N., Lubimov, V., Lüders, S., Lüke, D., Lytkin, L., Magnussen, N., Mahlke-Krüger, H., Malden, N., Malinovski, E., Malinovski, I., Maraček, R., Marage, P., Marks, J., Marshall, R., Martyn, H. -U, Martyniak, J., Maxfield, S. J., Mehta, A., Meier, K., Merkel, P., Meyer, A. B., Meyer, H., Meyer, J., Meyer, P. -O, Mikocki, S., Milstead, D., Mkrtchyan, T., Mohr, R., Mohrdieck, S., Mondragon, M. N., Moreau, F., Morozov, A., Morris, J. V., Müller, K., Murín, P., Nagovizin, V., Naroska, B., Naumann, J., Naumann, Th, Nellen, G., Newman, P. R., Nicholls, T. C., Niebergall, F., Niebuhr, C., Nix, O., Nowak, G., Nunnemann, T., Olsson, J. E., Ozerov, D., Panassik, V., Pascaud, C., Patel, G. D., Perez, E., Phillips, J. P., Pitzl, D., Päschl, R., Potachnikova, I., Povh, B., Rabbertz, K., Rädel, G., Rauschenberger, J., Reimer, P., Reisert, B., Reyna, D., Riess, S., Risler, C., Rizvi, E., Robmann, P., Roosen, R., Rostovtsev, A., Royon, C., Rusakov, S., Rybicki, K., Sankey, D. P. C., Scheins, J., Schilling, F. -P, Schleper, P., Schmidt, D., Schmitt, S., Schoeffel, L., Schöning, A., Schörner, T., Schröder, V., Schultz-Coulon, H. -C, Schwanenberger, C., Sedlák, K., Sefkow, F., Shekelyan, V., Sheviakov, I., Shtarkov, L. N., Sievers, P., Sirois, Y., Sloan, T., Smirnov, P., Solochenko, V., Soloviev, Y., Spaskov, V., Specka, A., Spitzer, H., Stamen, R., Steinhart, J., Stella, B., Stellberger, A., Stiewe, J., Straumann, U., Struczinski, W., Swart, M., Taševský, M., Tchernyshov, V., Tchetchelnitski, S., Thompson, G., Thompson, P. D., Tobien, N., Traynor, D., Truöl, P., Tsipolitis, G., Tsurin, I., Turnau, J., Turney, J. E., Tzamariudaki, E., Udluft, S., Usik, A., Valkár, S., Valkárová, A., Vallée, C., Mechelen, P., Vassiliev, S., Vazdik, Y., Vichnevski, A., Wacker, K., Wallny, R., Walter, T., Waugh, B., Weber, G., Weber, M., Wegener, D., Werner, M., White, G., Wiesand, S., Wilksen, T., Winde, M., Winter, G. -G, Wissing, Ch, Wobisch, M., Wollatz, H., Wänsch, E., Wyatt, A. C., Žáček, J., Zálešák, J., Zhang, Z., Zhokin, A., Zomer, F., Zsembery, J., Zur Nedden, M., 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), 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 H1 Collaboration
Subjects: Quantum chromodynamics, Physics, Particle physics, Physics and Astronomy (miscellaneous), Neutral current, 010308 nuclear & particles physics, Electroweak interaction, High Energy Physics::Phenomenology, FOS: Physical sciences, Perturbative QCD, Parton, HERA, Jet (particle physics), 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, 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, Engineering (miscellaneous), Charged current
Abstract: Jet production in charged and neutral current events in the kinematic range of Q^2 from 640 to 35000 GeV^2 is studied in deep-inelastic positron-proton scattering at HERA. The measured rate of multi-jet events and distributions of jet polar angle, transverse energy, dijet mass, and other dijet variables are presented. Using parton densities derived from inclusive DIS cross sections, perturbative QCD calculations in NLO are found to give a consistent description of both the neutral and charged current dijet production. A direct, model independent comparison of the jet distributions in charged and neutral current events confirms that the QCD dynamics of the hadronic final state is independent of the underlying electroweak scattering process., Comment: 28 pages, 10 figures, 4 tables
Published: 2001

30. Diffractive jet production in deep-inelastic e+ p collisions at HERA

Author: Adloff, C, Andreev, V, Andrieu, B, Anthonis, T, Arkadov, V, Astvatsatourov, A, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, S, Bate, P, Beglarian, A, Behnke, O, Beier, C, Belousov, A, Benisch, T, Berger, C, Berndt, T, Bizot, JC, Boudry, V, Braunschweig, W, Brisson, V, Broker, HB, Brown, DP, Bruckner, S, Bruel, P, Bruncko, D, Burger, J, Busser, FW, Bunyatyan, A, Burkhardt, H, Burrage, A, Buschhorn, G, Campbell, AJ, Cao, J, Carli, T, Caron, S, Chabert, E, Clarke, D, Clerbaux, B, Collard, C, Contreras, JG, Coppens, YR, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, Davidsson, M, Delcourt, B, Delerue, N, Demirchyan, R, De Roeck, A, De Wolf, EA, Diaconu, C, Dixon, P, Dodonov, V, Dowell, JD, Droutskoi, A, Duprel, D, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Ellerbrock, M, Elsen, E, Erdmann, M, Erdmann, W, Faulkner, PJW, Favart, L, Fedotov, A, Felst, R, Ferencei, J, Ferron, S, Fleischer, M, Fleming, YH, Flugge, G, Fomenko, A, Foresti, I, Formanek, J, Foster, JM, Franke, G, Gabathuler, E, Gabathuler, K, Garvey, J, Gassner, J, Gayler, J, Gerhards, R, Ghazaryan, S, Goerlich, L, Gogitidze, N, Goldberg, M, Goodwin, C, Crab, C, Grassler, H, Greenshaw, T, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, N, Herrera, G, Herynek, I, Hildebrandt, M, Hilgers, M, Hiller, KH, Hladky, J, Hoting, P, Hoffmann, D, Horisberger, R, Hurling, S, Ibbotson, M, Issever, C, Jacquet, M, Jaffre, M, Janauschek, L, Jansen, DM, Janssen, X, Jemanov, V, Jonsson, L, Johnson, DP, Jones, MAS, Jung, A, Kastli, HK, Kant, D, Kapichine, I, Karlsson, M, Karschnick, O, Keil, F, Keller, N, Kennedy, J, Kenyon, IR, Kermiche, S, Kiesling, C, Kjellberg, P, Klein, M, Kleinwort, C, Knies, G, Koblitz, B, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Koutouev, R, Koutov, A, Krasny, MW, Krehbiel, R, Kroseberg, J, Kruger, K, Kupper, A, Kuhr, T, Kurca, T, Lahmann, R, Lamb, D, Landon, MPJ, Lange, W, Lastovicka, T, Laycock, P, Lebailly, E, Lebedev, A, Leissner, B, Lemrani, R, Lendermann, V, Levonian, S, Lindstroem, M, List, B, Lobodzinska, E, Lobodzinski, B, Loginov, A, Loktionova, N, Lubimov, V, Luders, S, Luke, D, Lytkin, L, Magnussen, N, Mahlke-Kruger, H, Malden, N, Malinovski, E, Malinovski, I, Maracek, R, Marage, P, Marks, J, Marshall, R, Martyn, HU, Martyniak, J, Maxfield, SJ, Mehta, A, Meier, K, Merkel, P, Meyer, AB, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Mkrtchyan, T, Mohr, R, Mohrdieck, S, Mondragon, MN, Moreau, F, Morozov, A, Morris, JV, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, J, Naumann, T, Nellen, G, Newman, PR, Nicholls, TC, Niebergall, F, Niebuhr, C, Nix, O, Nowak, G, Nunnemann, T, Olsson, JE, Ozerov, D, Panassik, V, Pascaud, C, Patel, GD, Perez, E, Phillips, JP, Pitzl, D, Poschl, R, Potachnikova, I, Povh, B, Rabbertz, K, Radel, G, Rauschenberger, J, Reimer, P, Reisert, B, Reyna, D, Riess, S, Risler, C, Rizvi, E, Robmann, P, Roosen, K, Rostovtsev, A, Royon, C, Rusakov, S, Rybicki, K, Sankey, DPC, Scheins, J, Schilling, FP, Schleper, P, Schmidt, D, Schmitt, S, Schoeffel, L, Schoning, A, Schorner, T, Schroder, V, Schultz-Coulon, HC, Schwanenberger, C, Sedlak, K, Sefkow, F, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Sievers, P, Sirois, Y, Sloan, T, Smirnov, P, Solochenko, V, Soloviev, Y, Spaskov, V, Specka, A, Spitzer, H, Stamen, R, Steinhart, J, Stella, B, Stellberger, A, Stiewe, J, Straumann, U, Struczinski, W, Swart, M, Tasevsky, M, Tchernyshov, V, Tchetchelnitski, S, Thompson, G, Thompson, PD, Tobien, N, Traynor, D, Truol, P, Tsipolitis, G, Tsurin, I, Turnau, J, Turney, JE, Tzamariudaki, E, Udluft, S, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Mechelen, P, Vassiliev, S, Vazdik, Y, Vichnevski, A, Wacker, K, Wallny, R, Walter, T, Waugh, B, Weber, G, Weber, M, Wegener, D, Werner, M, White, G, Wiesand, S, Wilksen, T, Winde, M, Winter, GG, Wissing, C, Wobisch, M, Wollatz, H, Wunsch, E, Wyatt, AC, Zacek, H, Zalesak, J, Zhang, Z, Zhokin, A, Zomer, F, Zsembery, J, zur Nedden, M, Collaboration, H, 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, H1 Collaboration, 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, Particle physics, Photon, Luminosity (scattering theory), Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Scattering, Hadron, FOS: Physical sciences, HERA, Jet (particle physics), 01 natural sciences, High Energy Physics - Experiment, Gluon, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Rapidity, High Energy Physics::Experiment, 010306 general physics, Engineering (miscellaneous)
Abstract: A measurement is presented of dijet and 3-jet cross sections in low-|t| diffractive deep-inelastic scattering interactions of the type ep -> eXY, where the system X is separated by a large rapidity gap from a low-mass baryonic system Y. Data taken with the H1 detector at HERA, corresponding to an integrated luminosity of 18.0 pb^(-1), are used to measure hadron level single and double differential cross sections for 44 GeV. The energy flow not attributed to jets is also investigated. The measurements are consistent with a factorising diffractive exchange with trajectory intercept close to 1.2 and tightly constrain the dominating diffractive gluon distribution. Viewed in terms of the diffractive scattering of partonic fluctuations of the photon, the data require the dominance of qqbarg over qqbar states. Soft colour neutralisation models in their present form cannot simultaneously reproduce the shapes and the normalisations of the differential cross sections. Models based on 2-gluon exchange are able to reproduce the shapes of the cross sections at low x_pom values., Comment: 35 pages, 12 figures, 7 tables
Published: 2001

31. Measurement of Neutral and Charged Current Cross Sections in Electron-Proton Collisions at High $Q^{2}$

Author: Adloff, C., Andreev, V., Andrieu, B., Anthonis, T., Arkadov, V., Astvatsatourov, A., Ayyaz, I., Babaev, A., Bahr, J., Baranov, P., Barrelet, E., Bartel, W., Bassler, U., Bate, P., Beglarian, A., Behnke, O., Beier, C., Belousov, A., Benisch, T., Berger, C., Bernardi, G., Berndt, T., Bizot, J C., Boudry, V., Braunschweig, W., Brisson, V., Broker, B., Brown, D P., Bruckner, W., Bruel, Pascal, Bruncko, D., Burger, J., Busser, F W., Bunyatyan, A., Burkhardt, Hans, Burrage, A., Buschhorn, G., Campbell, a J., Cao, J., Carli, T., Caron, S., Chabert, E., Clarke, D., Clerbaux, B., Collard, C., Contreras, J G., Coppens, y R., Coughlan, J A., Cousinou, M C., Cox, B E., Cozzika, G., Cvach, J., Dainton, J B., Dau, W D., Daum, K., Davidsson, M., Delcourt, B., Delerue, N., Demirchyan, R., de Roeck, A., de Wolf, E A., Diaconu, C., Dixon, P., Dodonov, V., Dowell, J D., Droutskoi, A., Duprel, C., Eckerlin, G., Eckstein, D., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Ellerbrock, M., Elsen, E., Erdmann, M., Erdmann, W., Faulkner, P J W., Favart, L., Fedotov, A., Felst, R., Ferencei, J., Ferron, S., Fleischer, M., Fleming, y H., Flugge, G., Fomenko, A., Foresti, I., Formanek, J., Foster, J M., Franke, G., Gabathuler, E., Gabathuler, K., Garvey, J., Gassner, J., Gayler, J., Gerhards, R., Ghazaryan, S., Glazov, A., Gorlich, L., Gogitidze, N., Goldberg, M., Goodwin, C., Grab, C., Grassler, H., Greenshaw, T., Grindhammer, G., Hadig, T., Haidt, D., Hajduk, L., Haynes, W J., Heinemann, B., Heinzelmann, G., Henderson, R C W., Hengstmann, S., Henschel, H., Heremans, R., Herrera, G., Herynek, I., Hildebrandt, M., Hilgers, M., Hiller, K H., Hladky, J., Hoting, P., Hoffmann, D., Hoprich, W., Horisberger, R., Hurling, S., Ibbotson, M., Issever, C., Jacquet, M., Jaffre, M., Janauschek, L., Jansen, D M., Janssen, X., Jemanov, V., Jonsson, L B., Johnson, D P., Jones, M a S., Jung, H., Kastli, H K., Kant, D., Kapichine, M., Karlsson, M., Karschnick, O., Keil, F., Keller, N., Kennedy, J., Kenyon, I R., Kermiche, S., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Koblitz, B., Kolya, S D., Korbel, V., Kostka, P., Kotelnikov, S K., Koutouev, R., Koutov, A., Krasny, M W., Krehbiel, H., Kroseberg, J., Kruger, K., Kupper, A., Kuhr, T., Kurca, T., Lahmann, R., Lamb, D., Landon, M P J., Lange, W., Lastoviicka, T., Lebailly, E., Lebedev, A., Leiner, B., Lemrani, R., Lendermann, V., Levonian, S., Lindstrom, M., List, B., Lobodzinska, E., Lobodzinski, B., Loginov, A., Loktionova, N., Lubimov, V., Luders, S., Luke, D., Lytkin, L., Magnussen, N., Mahlke-Kruger, H., Malden, N., Malinovskii, E., Malinovski, I., Maracek, R., Marage, P., Marks, J., Marshall, R., Martyn, H U., Martyniak, J., Maxfield, S J., Mehta, A., Meier, K., Merkel, P., Metlica, F., Meyer, a B., Meyer, H., Meyer, J., Meyer, P O., Mikocki, S., Milstead, D., Mkrtchyan, T., Mohr, R., Mohrdieck, S., Mondragon, M N., Moreau, F., Morozov, A., Morris, J V., Muller, K., Murn, P., Nagovizin, V., Naroska, B., Naumann, J., Naumann, T., Nellen, G., Newman, P R., Nicholls, T C., Niebergall, F., Niebuhr, C., Nix, O., Nowak, G., Nunnemann, T., Olsson, J E., Ozerov, D., Panassik, V., Pascaud, C., Patel, G D., Perez, Emile, Phillips, J P., Pitzl, D., Poschl, R., Potachnikova, I., Povh, B., Rabbertz, K., Radel, G., Rauschenberger, J., Reimer, P., Reisert, B., Reyna, D., Riess, S., Risler, C., Rizvi, E., Robmann, P., Roosen, R., Rostovtsev, A., Royon, C., Rusakov, S., Rybicki, K., Sankey, D P C., Scheins, J., Schilling, F P., Schleper, P., Schmidt, D., Schmitt, S., Schoeffel, L., Schoning, A., Schorner, T., Schroder, V., Schultz-Coulon, H C., Schwanenberger, C., Sedlak, K., Sefkow, F., Shekelian, V., Shevyakov, I., Shtarkov, L N., Siegmon, G., Sievers, P., Sirois, Y., Sloan, T., Smirnov, P., Solochenko, V., Solovev, Yu., Spaskov, V., Specka, A., Spitzer, H., Stamen, R., Steinhart, J., Stella, B., Stellberger, A., Stiewe, J., Straumann, U., Struczinski, W., Swart, M., Tasevsky, M., Chernyshov, V., Chechelnitskii, S., Thompson, G., Thompson, P D., Tobien, N., Traynor, D., Truol, P., Tsipolitis, G., Tsurin, I., Turnau, J., Turney, J E., Tzamariudaki, E., Udluft, S., Usik, A., Valkar, S., Valkarova, A., Vallee, C., van Mechelen, P., Vassiliev, S., Vazdik, Ya., Vichnevski, A., von Dombrowski, S., Wacker, K., Wallny, R., Walter, T., Waugh, B., Weber, G., Weber, M., Wegener, D., Werner, M., White, G., Wiesand, S., Wilksen, T., Winde, M., Winter, G G., Wissing, C., Wobisch, M., Wollatz, H., Wunsch, E., Wyatt, a C., Zaicek, J., Zaleisak, J., Zhang, Zhiqing, Zhokin, A., Zomer, F., Zsembery, J., Zur Nedden, M., 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), 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 Kerec, Hélène
Subjects: [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment
Abstract: The inclusive e^-p single and double differential cross sections for neutral and charged current processes are measured with the H1 detector at HERA, in the range of four-momentum transfer squared Q^2 between 150 and 30000 GeV^2, and Bjorken x between 0.002 and 0.65. The data were taken in 1998 and 1999 with a centre-of-mass energy of 320 GeV and correspond to an integrated luminosity of 16.4 pb^(-1). The data are compared with recent measurements of the inclusive neutral and charged current e^+p cross sections. For Q^2 1000 GeV^2 clear evidence is observed for an asymmetry between e^+p and e^-p neutral current scattering and the generalised structure function xF_3 is extracted for the first time at HERA. A fit to the charged current data is used to extract a value for the W boson propagator mass. The data are found to be in good agreement with Standard Model predictions.
Published: 2001

32. Measurement of Neutral and Charged Current Cross Sections in Electron-Proton Collisions at High Q^2

Author: Adloff, C, Andreev, V, Andrieu, B, Anthonis, T, Arkadov, V, Astvatsatourov, A, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Bassler, U, Bate, P, Beglarian, A, Behnke, O, Beier, C, Belousov, A, Benisch, T, Berger, C, Bernardi, G, Berndt, T, Bizot, JC, Boudry, V, Braunschweig, W, Brisson, V, Broker, HB, Brown, DP, Bruckner, W, Bruel, P, Bruncko, D, Burger, J, Busser, FW, Bunyatyan, A, Burkhardt, H, Burrage, A, Buschhorn, G, Campbell, AJ, Cao, J, Carli, T, Caron, S, Chabert, E, Clarke, D, Clerbaux, B, Collard, C, Contreras, JG, Coppens, YR, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, Davidsson, M, Delcourt, B, Delerue, N, Demirchyan, R, De Roeck, A, De Wolf, EA, Diaconu, C, Dixon, P, Dodonov, V, Dowell, JD, Droutskoi, A, Dubak, A, Duprel, C, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Ellerbrock, M, Elsen, E, Erdmann, M, Erdmann, W, Faulkner, PJW, Favart, L, Fedotov, A, Felst, R, Ferencei, J, Ferron, S, Fleischer, M, Fleming, YH, Flugge, G, Fomenko, A, Foresti, I, Formanek, J, Foster, JM, Franke, G, Gabathuler, E, Gabathuler, K, Garvey, J, Gassner, J, Gayler, J, Gerhards, R, Ghazaryan, S, Goerlich, L, Gogitidze, N, Goldberg, M, Goodwin, C, Grab, C, Grassler, H, Greenshaw, T, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, R, Herrera, G, Herynek, I, Hildebrandt, M, Hilgers, M, Hiller, KH, Hladky, J, Hoting, P, Hoffmann, D, Horisberger, R, Hurling, S, Ibbotson, M, Issever, C, Jacquet, M, Jaffre, M, Janauschek, L, Jansen, DM, Janssen, X, Jemanov, V, Jonsson, L, Johnson, DP, Jones, MAS, Jung, H, Kastli, HK, Kant, D, Kapichine, M, Karlsson, M, Karschnick, O, Keil, F, Keller, N, Kennedy, J, Kenyon, IR, Kermiche, S, Kiesling, C, Kjellberg, P, Klein, M, Kleinwort, C, Knies, G, Koblitz, B, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Koutouev, R, Koutov, A, Krasny, MW, Krehbiel, H, Kroseberg, J, Kruger, K, Kupper, A, Kuhr, T, Kurca, T, Lahmann, R, Lamb, D, Landon, MPJ, Lange, W, Lastovicka, T, Laycock, P, Lebailly, E, Lebedev, A, Leissner, B, Lemrani, R, Lendermann, V, Levonian, S, Lindstroem, M, List, B, Lobodzinska, E, Lobodzinski, B, Loginov, A, Loktionova, N, Lubimov, V, Luders, S, Luke, D, Lytkin, L, Magnussen, N, Mahlke-Kruger, H, Malden, N, Malinovski, E, Malinovski, I, Maracek, R, Marage, P, Marks, J, Marshall, R, Martyn, HU, Martyniak, J, Maxfield, SJ, Mehta, A, Meier, K, Merkel, P, Meyer, AB, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Mkrtchyan, T, Mohr, R, Mohrdieck, S, Mondragon, MN, Moreau, F, Morozov, A, Morris, JV, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, J, Naumann, T, Nellen, G, Newman, PR, Nicholls, TC, Niebergall, F, Niebuhr, C, Nix, O, Nowak, G, Nunnemann, T, Olsson, JE, Ozerov, D, Panassik, V, Pascaud, C, Patel, GD, Perez, E, Phillips, JP, Pitzl, D, Poschl, R, Potachnikova, I, Povh, B, Rabbertz, K, Radel, G, Rauschenberger, J, Reimer, P, Reisert, B, Reyna, D, Riess, S, Risler, C, Rizvi, E, Robmann, P, Roosen, R, Rostovtsev, A, Royon, C, Rusakov, S, Rybicki, K, Sankey, DPC, Scheins, J, Schilling, FP, Schleper, P, Schmidt, D, Schmitt, S, Schoeffel, L, Schoning, A, Schorner, T, Schroder, V, Schultz-Coulon, HC, Schwanenberger, C, Sedlak, K, Sefkow, F, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Sievers, P, Sirois, Y, Sloan, T, Smirnov, P, Solochenko, V, Soloviev, Y, Spaskov, V, Specka, A, Spitzer, H, Stamen, R, Steinhart, J, Stella, B, Stellberger, A, Stiewe, J, Straumann, U, Struczinski, W, Swart, M, Tasevsky, M, Tchernyshov, V, Tchetchelnitski, S, Thompson, G, Thompson, PD, Tobien, N, Traynor, D, Truol, P, Tsipolitis, G, Tsurin, I, Turnau, J, Turney, JE, Tzamariudaki, E, Udluft, S, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Mechelen, P, Vassiliev, S, Vazdik, Y, Vichnevski, A, Wacker, K, Wallny, R, Walter, T, Waugh, B, Weber, G, Weber, M, Wegener, D, Werner, M, White, G, Wiesand, S, Wilksen, T, Winde, M, Winter, GG, Wissing, C, Wobisch, M, Wollatz, H, Wunsch, E, Wyatt, AC, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zomer, F, Zsembery, J, zur Nedden, M, Collaboration, H, and H1 Collaboration
Subjects: Physics, Particle physics, Range (particle radiation), Luminosity (scattering theory), Physics and Astronomy (miscellaneous), Neutral current, Proton, FOS: Physical sciences, HERA, Electron, Standard Model, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), High Energy Physics::Experiment, Engineering (miscellaneous), Charged current
Abstract: The inclusive e^-p single and double differential cross sections for neutral and charged current processes are measured with the H1 detector at HERA, in the range of four-momentum transfer squared Q^2 between 150 and 30000 GeV^2, and Bjorken x between 0.002 and 0.65. The data were taken in 1998 and 1999 with a centre-of-mass energy of 320 GeV and correspond to an integrated luminosity of 16.4 pb^(-1). The data are compared with recent measurements of the inclusive neutral and charged current e^+p cross sections. For Q^2>1000 GeV^2 clear evidence is observed for an asymmetry between e^+p and e^-p neutral current scattering and the generalised structure function xF_3 is extracted for the first time at HERA. A fit to the charged current data is used to extract a value for the W boson propagator mass. The data are found to be in good agreement with Standard Model predictions., 39 pages, 10 figures, 10 tables
Published: 2000

33. A search for excited fermions at HERA

Author: Adloff, C, Andreev, V, Andrieu, B, Arkadov, V, Astvatsatourov, A, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Bassler, U, Bate, P, Beglarian, A, Behnke, O, Beier, C, Belousov, A, Benisch, T, Berger, C, Bernardi, G, Berndt, T, Bizot, JC, Borras, K, Boudry, V, Braunschweig, W, Brisson, V, Broker, HB, Brown, DP, Bruckner, W, Bruel, P, Bruncko, D, Burger, J, Busser, FW, Bunyatyan, A, Burkhardt, H, Burrage, A, Buschhorn, G, Campbell, AJ, Cao, J, Carli, T, Caron, S, Chabert, E, Clarke, D, Clerbaux, B, Collard, C, Contreras, JG, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, Davidsson, M, Delcourt, B, Delerue, N, Demirchyan, R, De Roeck, A, De Wolf, EA, Diaconu, C, Dixon, P, Dodonov, V, Dowell, JD, Droutskoi, A, Duprel, C, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Ellerbrock, M, Elsen, E, Erdmann, M, Erdmann, W, Faulkner, PJW, Favart, L, Fedotov, A, Felst, R, Ferencei, J, Ferron, S, Fleischer, M, Flugge, G, Fomenko, A, Foresti, I, Formanek, J, Foster, JM, Franke, G, Gabathuler, E, Gabathuler, K, Garvey, J, Gassner, J, Gayler, J, Gerhards, R, Ghazaryan, S, Goerlich, L, Gogitidze, N, Goldberg, M, Goodwin, C, Grab, C, Grassler, H, Greenshaw, T, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, R, Herrera, G, Herynek, I, Hilgers, M, Hiller, KH, Hladky, J, Hoting, P, Hoffmann, D, Hoprich, W, Horisberger, R, Hurling, S, Ibbotson, M, Issever, C, Jacquet, M, Jaffre, M, Janauschek, L, Jansen, DM, Janssen, X, Jemanov, V, Jonsson, L, Johnson, DP, Jones, MAS, Jung, H, Kastli, HK, Kant, D, Kapichine, M, Karlsson, M, Karschnick, O, Kaufmann, O, Kausch, M, Keil, F, Keller, N, Kennedy, J, Kenyon, IR, Kermiche, S, Kiesling, C, Klein, M, Kleinwort, C, Knies, G, Koblitz, B, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Krasny, MW, Krehbiel, H, Kroseberg, J, Kruger, K, Kupper, A, Kuhr, T, Kurca, T, Kutuev, R, Lachnit, W, Lahmann, R, Lamb, D, Landon, MPJ, Lange, W, Lastovicka, T, Lebailly, E, Lebedev, A, Leissner, B, Lemrani, R, Lendermann, V, Levonian, S, Lindstroem, M, Lobodzinska, E, Lobodzinski, B, Loktionova, N, Lubimov, V, Luders, S, Luke, D, Lytkin, L, Magnussen, N, Mahlke-Kruger, H, Malden, N, Malinovski, E, Malinovski, I, Maracek, R, Marage, P, Marks, J, Marshall, R, Martyn, HU, Martyniak, J, Maxfield, SJ, Mehta, A, Meier, K, Merkel, P, Metlica, F, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Mkrtchyan, T, Mohr, R, Mohrdieck, S, Mondragon, MN, Moreau, F, Morozov, A, Morris, JV, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, J, Naumann, T, Negri, I, Nellen, G, Newman, PR, Nicholls, TC, Niebergall, F, Niebuhr, C, Nix, O, Nowak, G, Nunnemann, T, Olsson, JE, Ozerov, D, Panassik, V, Pascaud, C, Patel, GD, Perez, E, Phillips, JP, Pitzl, D, Poschl, R, Potachnikova, I, Povh, B, Rabbertz, K, Radel, G, Rauschenberger, J, Reimer, P, Reisert, B, Reyna, D, Riess, S, Rizvi, E, Robmann, P, Roosen, R, Rostovtsev, A, Royon, C, Rusakov, S, Rybicki, K, Sankey, DPC, Scheins, J, Schilling, FP, Schleper, P, Schmidt, D, Schmitt, S, Schoeffel, L, Schoning, A, Schorner, T, Schroder, V, Schultz-Coulon, HC, Sedlak, K, Sefkow, F, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Siegmon, G, Sievers, P, Sirois, Y, Sloan, T, Smirnov, P, Solochenko, V, Soloviev, Y, Spaskov, V, Specka, A, Spitzer, H, Stamen, R, Steinhart, J, Stella, B, Stellberger, A, Stiewe, J, Straumann, U, Struczinski, W, Swart, M, Tasevsky, M, Tchernyshov, V, Tchetchelnitski, S, Thompson, G, Thompson, PD, Tobien, N, Traynor, D, Truol, P, Tsipolitis, G, Turnau, J, Turney, JE, Tzamariudaki, E, Udluft, S, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Mechelen, P, Vazdik, Y, von Dombrowski, S, Wacker, K, Wallny, R, Walter, T, Waugh, B, Weber, G, Weber, M, Wegener, D, Wegner, A, Wengler, T, Werner, M, White, G, Wiesand, S, Wilksen, T, Winde, M, Winter, GG, Wissing, C, Wobisch, M, Wollatz, H, Wunsch, E, Wyatt, AC, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zomer, F, Zsembery, J, zur Nedden, M, Collaboration, H, 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, H1 Collaboration, 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, Coupling constant, Particle physics, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Hadron, Electroweak interaction, FOS: Physical sciences, Fermion, HERA, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, law.invention, High Energy Physics - Experiment (hep-ex), law, Excited state, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, Collider, Engineering (miscellaneous), Lepton
Abstract: A search for excited fermions f^* of the first generation in e^+p scattering at the collider HERA is presented using H1 data with an integrated luminosity of 37 pb^(-1). All electroweak decays of excited fermions, f^* -> f gamma, f W, f Z are considered and all possible final states resulting from the Z or W hadronic decays or decays into leptons of the first two generations are taken into account. No evidence for f^* production is found. Mass dependent exclusion limits on cross-sections and on the ratio of coupling constants to the compositeness scale are derived., 27 pages, 12 figures, 5 tables
Published: 2000

34. Measurement and QCD Analysis of Jet Cross Sections in Deep-Inelastic Positron-Proton Collisions at sqrt(s) of 300 GeV

Author: Adloff, C, Andreev, V, Andrieu, B, Anthonis, T, Arkadov, V, Astvatsatourov, A, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Bassler, U, Bate, P, Beglarian, A, Behnke, O, Beier, C, Belousov, A, Benisch, T, Berger, C, Bernardi, G, Berndt, T, Bizot, JC, Boudry, V, Braunschweig, W, Brisson, V, Broker, HB, Brown, DP, Bruckner, W, Bruel, P, Bruncko, D, Burger, J, Busser, FW, Bunyatyan, A, Burkhardt, H, Burrage, A, Buschhorn, G, Campbell, AJ, Cao, J, Carli, T, Caron, S, Chabert, E, Clarke, D, Clerbaux, B, Collard, C, Contreras, JG, Coppens, YR, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, Davidsson, M, Delcourt, B, Delerue, N, Demirchyan, R, De Roeck, A, De Wolf, EA, Diaconu, C, Dixon, P, Dodonov, V, Dowell, JD, Droutskoi, A, Duprel, C, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Ellerbrock, M, Elsen, E, Erdmann, M, Erdmann, W, Faulkner, PJW, Favart, L, Fedotov, A, Felst, R, Ferencei, J, Ferron, S, Fleischer, M, Fleming, YH, Flugge, G, Fomenko, A, Foresti, I, Formanek, J, Foster, JM, Franke, G, Gabathuler, E, Gabathuler, K, Garvey, J, Gassner, J, Gayler, J, Gerhards, R, Ghazaryan, S, Goerlich, L, Gogitidze, N, Goldberg, M, Goodwin, C, Grab, C, Grassler, H, Greenshaw, T, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, R, Herrera, G, Herynek, I, Hildebrandt, M, Hilgers, M, Hiller, KH, Hladky, J, Hoting, P, Hoffmann, D, Hoprich, W, Horisberger, R, Hurling, S, Ibbotson, M, Issever, C, Jacquet, M, Jaffre, M, Janauschek, L, Jansen, DM, Janssen, X, Jemanov, V, Jonsson, L, Johnson, DP, Jones, MAS, Jung, H, Kastli, HK, Kant, D, Kapichine, M, Karlsson, M, Karschnick, O, Keil, F, Keller, N, Kennedy, J, Kenyon, IR, Kermiche, S, Kiesling, C, Klein, M, Kleinwort, C, Knies, G, Koblitz, B, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Koutouev, R, Koutov, A, Krasny, MW, Krehbiel, H, Kroseberg, J, Kruger, K, Kupper, A, Kuhr, T, Kurca, T, Lahmann, R, Lamb, D, Landon, MPJ, Lange, W, Lastovicka, T, Lebailly, E, Lebedev, A, Leissner, B, Lemrani, R, Lendermann, V, Levonian, S, Lindstroem, M, List, B, Lobodzinska, E, Lobodzinski, B, Loginov, A, Loktionova, N, Lubimov, V, Luders, S, Luke, D, Lytkin, L, Magnussen, N, Mahlke-Kruger, H, Malden, N, Malinovski, E, Malinovski, I, Maracek, R, Marage, P, Marks, J, Marshall, R, Martyn, HU, Martyniak, J, Maxfield, SJ, Mehta, A, Meier, K, Merkel, P, Metlica, F, Meyer, AB, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Mkrtchyan, T, Mohr, R, Mohrdieck, S, Mondragon, MN, Moreau, F, Morozov, A, Morris, JV, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, J, Naumann, T, Nellen, G, Newman, PR, Nicholls, TC, Niebergall, F, Niebuhr, C, Nix, O, Nowak, G, Nunnemann, T, Olsson, JE, Ozerov, D, Panassik, V, Pascaud, C, Patel, GD, Perez, E, Phillips, JP, Pitzl, D, Poschl, R, Potachnikova, I, Povh, B, Rabbertz, K, Radel, G, Rauschenberger, J, Reimer, P, Reisert, B, Reyna, D, Riess, S, Risler, C, Rizvi, E, Robmann, P, Roosen, R, Rostovtsev, A, Royon, C, Rusakov, S, Rybicki, K, Sankey, DPC, Scheins, J, Schilling, FP, Schleper, P, Schmidt, D, Schmitt, S, Schoeffel, L, Schoning, A, Schorner, T, Schroder, V, Schultz-Coulon, HC, Schwanenberger, C, Sedlak, K, Sefkow, F, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Siegmon, G, Sievers, P, Sirois, Y, Sloan, T, Smirnov, P, Solochenko, V, Soloviev, Y, Spaskov, V, Specka, A, Spitzer, H, Stamen, R, Steinhart, J, Stella, B, Stellberger, A, Stiewe, J, Straumann, U, Struczinski, W, Swart, M, Tasevsky, M, Tchernyshov, V, Tchetchelnitski, S, Thompson, G, Thompson, PD, Tobien, N, Traynor, D, Truol, P, Tsipolitis, G, Tsurin, I, Turnau, J, Turney, JE, Tzamariudaki, E, Udluft, S, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Mechelen, P, Vassiliev, S, Vazdik, Y, Vichnevski, A, von Dombrowski, S, Wacker, K, Wallny, R, Walter, T, Waugh, B, Weber, G, Weber, M, Wegener, D, Werner, M, White, G, Wiesand, S, Wilksen, T, Winde, M, Winter, GG, Wissing, C, Wobisch, M, Wollatz, H, Wunsch, E, Wyatt, AC, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zomer, F, Zsembery, J, zur Nedden, M, Collaboration, H, H1 Collaboration, 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), 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, Damoiseaux, Magali, 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: Quantum chromodynamics, Physics, Particle physics, Luminosity (scattering theory), Physics and Astronomy (miscellaneous), Proton, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], 010308 nuclear & particles physics, Perturbative QCD, FOS: Physical sciences, HERA, Jet (particle physics), 01 natural sciences, 7. Clean energy, Gluon, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Positron, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, Nuclear Experiment, Engineering (miscellaneous)
Abstract: Jet production is studied in the Breit frame in deep-inelastic positron-proton scattering over a large range of four-momentum transfers 5 < Q^2 < 15000 GeV^2 and transverse jet energies 7 < E_T < 60 GeV. The analysis is based on data corresponding to an integrated luminosity of L_int \simeq 33 pb^(-1) taken in the years 1995-1997 with the H1 detector at HERA at a center-of-mass energy sqrt(s)=300 GeV. Dijet and inclusive jet cross sections are measured multi-differentially using k_perp and angular ordered jet algorithms. The results are compared to the predictions of perturbative QCD calculations in next-to-leading order in the strong coupling constant alphas.QCD fits are performed in which alphas and the gluon density in the proton are determined separately. The gluon density is found to be in good agreement with results obtained in other analyses using data from different processes. The strong coupling constant is determined to be alphas(MZ)=0.1186+-0.0059. In addition an analysis of the data in which both alphas and the gluon density are determined simultaneously is presented., 44 pages, 19 figures, 5 tables
Published: 2000

35. Measurement of elastic electroproduction of phi mesons at HERA

Author: Adloff, C, Andreev, V, Andrieu, B, Arkadov, V, Astvatsatourov, A, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Bassler, U, Bate, P, Beglarian, A, Behnke, O, Beier, C, Belousov, A, Benisch, T, Berger, C, Bernardi, G, Berndt, T, Bizot, JC, Borras, K, Boudry, V, Braunschweig, W, Brisson, V, Broker, HB, Brown, DP, Bruckner, W, Bruel, P, Bruncko, D, Burger, J, Busser, FW, Bunyatyan, A, Burkhardt, H, Burrage, A, Buschhorn, G, Campbell, AJ, Cao, J, Carli, T, Caron, S, Chabert, E, Clarke, D, Clerbaux, B, Collard, C, Contreras, JG, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, David, M, Davidsson, M, Delcourt, B, Delerue, N, Demirchyan, R, De Roeck, A, De Wolf, EA, Diaconu, C, Dixon, P, Dodonov, V, Dowell, JD, Droutskoi, A, Duprel, C, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Ellerbrock, M, Elsen, E, Erdmann, M, Erdmann, W, Faulkner, PJW, Favart, L, Fedotov, A, Felst, R, Ferencei, J, Ferron, S, Fleischer, M, Flugge, G, Fomenko, A, Foresti, I, Formanek, J, Foster, JM, Franke, G, Gabathuler, E, Gabathuler, K, Garvey, J, Gassner, J, Gayler, J, Gerhards, R, Ghazaryan, S, Goerlich, L, Gogitidze, N, Goldberg, M, Goodwin, C, Grab, C, Grassler, H, Greenshaw, T, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, R, Herrera, G, Herynek, I, Hilgers, M, Hiller, KH, Hladky, J, Hoting, P, Hoffmann, D, Hoprich, W, Horisberger, R, Hurling, S, Ibbotson, M, Issever, C, Jacquet, M, Jaffre, M, Janauschek, L, Jansen, DM, Janssen, X, Jemanov, V, Jonsson, L, Johnson, DP, Jones, MAS, Jung, H, Kastli, HK, Kant, D, Kapichine, M, Karlsson, M, Karschnick, O, Kaufmann, O, Kausch, M, Keil, F, Keller, N, Kennedy, J, Kenyon, IR, Kermiche, S, Kiesling, C, Klein, M, Kleinwort, C, Knies, G, Koblitz, B, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Krasny, MW, Krehbiel, H, Kroseberg, J, Krucker, D, Kruger, K, Kupper, A, Kuhr, T, Kurca, T, Kutuev, R, Lachnit, W, Lahmann, R, Lamb, D, Landon, MPJ, Lange, W, Lastovicka, T, Lebedev, A, Leissner, B, Lemrani, R, Lendermann, V, Levonian, S, Lindstroem, M, Lobodzinska, E, Lobodzinski, B, Loktionova, N, Lubimov, V, Luders, S, Luke, D, Lytkin, L, Magnussen, N, Mahlke-Kruger, H, Malden, N, Malinovski, E, Malinovski, I, Maracek, R, Marage, P, Marks, J, Marshall, R, Martyn, HU, Martyniak, J, Maxfield, SJ, Mehta, A, Meier, K, Merkel, P, Metlica, F, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Mkrtchyan, T, Mohr, R, Mohrdieck, S, Mondragon, MN, Moreau, F, Morozov, A, Morris, JV, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, J, Naumann, T, Nellen, G, Newman, PR, Nicholls, TC, Niebergall, F, Niebuhr, C, Nix, O, Nowak, G, Nunnemann, T, Olsson, JE, Ozerov, D, Panassik, V, Pascaud, C, Patel, GD, Perez, E, Phillips, JP, Pitzl, D, Poschl, R, Potachnikova, I, Povh, B, Rabbertz, K, Radel, G, Rauschenberger, J, Reimer, P, Reisert, B, Reyna, D, Riess, S, Rizvi, E, Robmann, P, Roosen, R, Rostovtsev, A, Royon, C, Rusakov, S, Rybicki, K, Sankey, DPC, Scheins, J, Schilling, FP, Schleper, P, Schmidt, D, Schoeffel, L, Schoning, A, Schorner, T, Schroder, V, Schultz-Coulon, HC, Sedlak, K, Sefkow, F, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Siegmon, G, Sievers, P, Sirois, Y, Sloan, T, Smirnov, P, Solochenko, V, Soloviev, Y, Spaskov, V, Specka, A, Spitzer, H, Stamen, R, Steinhart, J, Stella, B, Stellberger, A, Stiewe, J, Straumann, U, Struczinski, W, Swart, M, Tasevsky, M, Tchernyshov, V, Tchetchelnitski, S, Thompson, G, Thompson, PD, Tobien, N, Traynor, D, Truol, P, Tsipolitis, G, Turnau, J, Turney, JE, Tzamariudaki, E, Udluft, S, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Mechelen, P, Vazdik, Y, von Dombrowski, S, Wacker, K, Wallny, R, Walter, T, Waugh, B, Weber, G, Weber, M, Wegener, D, Wegner, A, Wengler, T, Warner, M, White, G, Wiesand, S, Wilksen, T, Winde, M, Winter, GG, Wissing, C, Wobisch, M, Wollatz, H, Wunsch, E, Wyatt, AC, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zomer, F, Zsembery, J, zur Nedden, M, Collaboration, H, 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, H1 Collaboration, 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, Quark, Nuclear and High Energy Physics, Particle physics, Proton, Meson, 010308 nuclear & particles physics, Hadron, Nuclear Theory, High Energy Physics::Phenomenology, FOS: Physical sciences, HERA, Phi meson, 01 natural sciences, 7. Clean energy, Helicity, Omega, High Energy Physics - Experiment, 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, Nuclear Experiment
Abstract: The elastic electroproduction of phi mesons is studied at HERA with the H1 detector for photon virtualities 1 < Q^2 < 15 GeV^2 and hadronic centre of mass energies 40 < W < 130 GeV. The Q^2 and t dependences of the cross section are extracted (t being the square of the four-momentum transfer to the target proton). When plotted as function of (Q^2 + M_V^2) and scaled by the appropriate SU(5) quark charge factor, the phi meson cross section agrees within errors with the cross sections of the vector mesons V = rho, omega and J/psi. A detailed analysis is performed of the phi meson polarisation state and the ratio of the production cross sections for longitudinally and transversely polarised phi mesons is determined. A small but significant violation of s-channel helicity conservation (SCHC) is observed., 17 pages, 7 figures and 2 tables
Published: 2000

36. Di-jet event rates in deep-inelastic scattering at HERA

Author: Adloff, C, Aid, S, Anderson, M, Andreev, V, Andrieu, B, Arkadov, V, Arndt, C, Ayyaz, I, Babaev, A, Bahr, J, Ban, J, Baranov, P, Barrelet, E, Barschke, R, Bartel, T, Bassler, U, Beck, M, Behrend, HJ, Beier, C, Belousov, A, Berger, C, Bernardi, G, Bertrand-Coremans, G, Beyer, R, Biddulph, P, Bizot, JC, Borras, K, Boudry, V, Bourov, S, Braemer, A, Braunschweig, W, Brisson, V, Brown, DP, Bruckner, W, Bruel, P, Bruncko, D, Brune, C, Burger, J, Busser, FW, Buniatian, A, Burke, S, Buschhorn, G, Calvet, D, Campbell, AJ, Carli, T, Charlet, M, Clarke, D, Clerbaux, B, Cocks, S, Contreras, JG, Cormack, C, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, David, M, Davidsson, M, De Roeck, A, De Wolf, EA, Delcourt, B, Dirkmann, M, Dixon, P, Dlugosz, W, Donovan, KT, Dowell, JD, Droutskoi, A, Ebert, J, Ebert, TR, Eckerlin, G, Efremenko, T, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Elsen, E, Erdmann, M, Fahr, AB, Favart, L, Fedotov, A, Felst, R, Feltesse, J, Ferencei, J, Ferrarotto, F, Flamm, K, Fleischer, M, Flieser, M, Flugge, G, Fomenko, A, Formanek, J, Foster, JM, Franke, G, Gabathuler, E, Gabathuler, K, Gaede, F, Garvey, J, Gayler, J, Gebauer, M, Gerhards, R, Glazov, A, Goerlich, L, Gogitidze, N, Goldberg, M, Gorelov, I, Grab, C, Graissler, K, Greenshaw, T, Griffiths, RK, Grindhammer, G, Gruber, A, Gruber, C, Hadig, T, Haidt, D, Hajduk, L, Haller, T, Hampel, M, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, R, Herynek, I, Hewitt, K, Hiller, KH, Hilton, CD, Hladky, J, Hoppner, M, Hoffmann, D, Holtom, T, Horisberger, R, Hudgson, VL, Hutte, M, Ibbotson, M, Issever, C, Itterbeck, H, Jacquet, M, Jaffre, M, Janoth, J, Jansen, DM, Jonsson, L, Johnson, DP, Jung, H, Kalmus, PIP, Kander, M, Kant, D, Karlsson, M, Kathage, U, Katzy, J, Kaufmann, HH, Kaufmann, O, Kausch, M, Kazarian, S, Kenyon, IR, Kermiche, S, Keuker, C, Kiesling, C, Klein, M, Kleinwort, C, Knies, G, Kohne, JH, Kolanoski, H, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Kramerkamper, T, Krasny, MW, Krehbiel, K, Krucker, D, Kupper, A, Kuster, H, Kuhlen, M, Kurca, T, Laforge, B, Lahmann, R, Landon, MPJ, Lange, W, Langenegger, U, Lebedev, A, Lehner, F, Lemaitre, V, Levonian, S, Lindstroem, M, Lipinski, J, List, B, Lobo, G, Lopez, GC, Lubimov, V, Luke, D, Lytkin, L, Magnussen, N, Mahlke-Kruger, H, Malinovski, E, Maracek, R, Marage, P, Marks, J, Marshall, R, Martens, J, Martin, G, Martin, R, Martyn, HU, Martyniak, J, Maxfield, SJ, McMahon, SJ, Mehta, A, Meier, K, Merkel, P, Metlica, F, Meyer, A, Meyer, H, Meyer, J, Meyer, PO, Migliori, A, Mikocki, S, Milstead, D, Moeck, J, Moreau, F, Morris, JV, Mroczko, E, Muller, D, Muller, K, Murin, H, Nagovizin, V, Nahnhauer, R, Naroska, B, Naumann, T, Negri, I, Newman, RP, Newton, D, Nguyen, HK, Nicholls, TC, Niebergall, F, Niebuhr, C, Niedzballa, C, Niggli, H, Nowak, G, Nunnemann, T, Oberlack, H, Olsson, JE, Ozerov, D, Palmen, P, Panaro, E, Panitch, A, Pascaud, C, Passaggio, S, Patel, GD, Pawletta, H, Peppel, E, Perez, E, Phillips, JP, Pieuchot, A, Pitzl, D, Poschl, R, Pope, G, Povh, B, Rabbertz, K, Reimer, P, Rick, H, Riess, S, Rizvi, E, Robmann, P, Roosen, R, Rosenbauer, K, Rostovtsev, A, Rouse, F, Royon, C, Ruter, K, Rusakov, S, Rybicki, K, Sankey, DPC, Schacht, P, Scheins, J, Schiek, S, Schleif, S, von Schlippe, W, Schmidt, D, Schmidt, G, Schoeffel, L, Schoning, A, Schroder, V, Schuhmann, E, Schultz-Coulon, HC, Schwab, B, Sefkow, F, Semenov, A, Shekelyan, V, Sheviakov, I, Shtarov, LN, Siegmon, G, Siewert, U, Sirois, Y, Skillicorn, IO, Sloan, T, Smirnov, P, Smith, M, Solochenko, V, Soloviev, Y, Specka, A, Spiekermann, J, Spielman, S, Spitzer, H, Squinabol, F, Steffen, P, Steinberg, R, Steinhart, J, Stella, B, Stellberger, A, Stiewe, J, Stolze, K, Straumann, U, Struczinski, W, Sutton, JP, Swart, M, Tapprogge, S, Tasevsky, M, Tchernyshov, V, Tchetchelnitski, S, Theissen, J, Thompson, G, Thompson, PD, Tobien, N, Todenhagen, R, Truol, P, Zalesak, J, Tsipolitis, G, Turnau, J, Tzamariudaki, E, Uelkes, P, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Esch, P, Van Mechelen, P, Vandenplas, D, Vazdik, Y, Verrecchia, P, Villet, G, Wacker, K, Wagener, A, Wagener, M, Wallny, R, Walter, T, Waugh, B, Weber, G, Weber, M, Wegener, D, Wegner, A, Wengler, T, Werner, M, West, LR, Wiesand, S, Wilksen, T, Willard, S, Winde, M, Winter, GG, Wittek, C, Wobisch, M, Wollatz, H, Wunsch, E, Zacek, J, Zarbock, D, Zhang, Z, Zhokin, A, Zini, P, Zomer, F, Zsembery, J, zurNedden, M, and Collaboration, H
Published: 2000

37. Measurement of Di-jet Cross-Sections in Photoproduction and Photon Structure

Author: Adloff, C, Andreev, V, Andrieu, B, Arkadov, V, Astvatsatourov, A, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Bassler, U, Bate, P, Beglarian, A, Behnke, O, Beier, C, Belousov, A, Benisch, T, Berger, C, Bernardi, G, Berndt, T, Bertrand-Coremans, G, Bizot, JC, Borras, K, Boudry, V, Braunschweig, W, Brisson, V, Broker, HB, Brown, DP, Bruckner, W, Bruel, P, Bruncko, D, Burger, J, Busser, FW, Bunyatyan, A, Burke, S, Burkhardt, H, Burrage, A, Buschhorn, G, Campbell, AJ, Cao, J, Carli, T, Caron, S, Chabert, E, Clarke, D, Clerbaux, B, Collard, C, Contreras, JG, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, David, M, Davidsson, M, Delcourt, B, Delerue, N, Demirchyan, R, De Roeck, A, De Wolf, EA, Diaconu, C, Dixon, P, Dodonov, V, Donovan, KT, Dowell, JD, Droutskoi, A, Duprel, C, Ebert, J, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Ellerbrock, M, Elsen, E, Erdmann, M, Faulkner, PJW, Favart, L, Fedotov, A, Felst, R, Feltesse, J, Ferencei, J, Ferrarotto, F, Ferron, S, Fleischer, M, Flugge, G, Fomenko, A, Foresti, I, Formanek, J, Foster, JM, Franke, G, Gabathuler, E, Gabathuler, K, Garvey, J, Gassner, J, Gayler, J, Gerhards, R, Ghazaryan, S, Glazov, A, Goerlich, L, Gogitidze, N, Goldberg, M, Goodwin, C, Gorelov, I, Grab, C, Grassler, H, Greenshaw, T, Griffiths, RK, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Haustein, V, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, R, Herrera, G, Herynek, I, Hilgers, M, Hiller, KH, Hilton, CD, Hladky, J, Hoting, P, Hoffmann, D, Hoprich, W, Horisberger, R, Hurling, S, Ibbotson, M, Issever, C, Jacquet, M, Jaffre, M, Janauschek, L, Jansen, DM, Janssen, X, Jemanov, V, Jonsson, L, Johnson, DP, Jones, MAS, Jung, H, Kastli, HK, Kant, D, Kapichine, M, Karlsson, M, Karschnick, O, Kaufmann, O, Kausch, M, Keil, F, Keller, N, Kennedy, J, Kenyon, IR, Kermiche, S, Kiesling, C, Klein, M, Kleinwort, C, Knies, G, Koblitz, B, Kolanoski, H, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Krasny, MW, Krehbiel, H, Kroseberg, J, Krucker, D, Kruger, K, Kupper, A, Kuhr, T, Kurca, T, Kutuev, R, Lachnit, W, Lahmann, R, Lamb, D, Landon, MPJ, Lange, W, Lastovicka, T, Lebedev, A, Leissner, B, Lemaitre, V, Lemrani, R, Lendermann, V, Levonian, S, Lindstroem, M, Lobo, G, Lobodzinska, E, Lobodzinski, B, Loktionova, N, Lubimov, V, Luders, S, Luke, D, Lytkin, L, Magnussen, N, Mahlke-Kruger, H, Malden, N, Malinovski, E, Malinovski, I, Maracek, R, Marage, P, Marks, J, Marshall, R, Martyn, HU, Martyniak, J, Maxfield, SJ, McMahon, TR, Mehta, A, Meier, K, Merkel, P, Metlica, F, Meyer, A, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Mkrtchyan, T, Mohr, R, Mohrdieck, S, Mondragon, MN, Moreau, F, Morozov, A, Morris, JV, Muller, D, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, J, Naumann, T, Negri, I, Newman, PR, Nguyen, HK, Nicholls, TC, Niebergall, F, Niebuhr, C, Nix, O, Nowak, G, Nunnemann, T, Olsson, JE, Ozerov, D, Panassik, V, Pascaud, C, Passaggio, S, Patel, GD, Perez, E, Phillips, JP, Pitzl, D, Poschl, R, Potachnikova, I, Povh, B, Rabbertz, K, Radel, G, Rauschenberger, J, Reimer, P, Reisert, B, Reyna, D, Riess, S, Rizvi, E, Robmann, P, Roosen, R, Rostovtsev, A, Royon, C, Rusakov, S, Rybicki, K, Sankey, DPC, Scheins, J, Schilling, FP, Schleif, S, Schleper, P, Schmidt, D, Schoeffel, L, Schoning, A, Schorner, T, Schroder, V, Schultz-Coulon, HC, Sedlak, K, Sefkow, F, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Siegmon, G, Sievers, P, Sirois, Y, Sloan, T, Smirnov, P, Smith, M, Solochenko, V, Soloviev, Y, Spaskov, V, Specka, A, Spitzer, H, Stamen, R, Steinhart, J, Stella, B, Stellberger, A, Stiewe, J, Straumann, U, Struczinski, W, Sutton, JP, Swart, M, Tasevsky, M, Tchernyshov, V, Tchetchelnitski, S, Thompson, G, Thompson, PD, Tobien, N, Traynor, D, Truol, P, Tsipolitis, G, Turnau, J, Turney, JE, Tzamariudaki, E, Udluft, S, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Mechelen, P, Vazdik, Y, Villet, G, von Dombrowski, S, Wacker, K, Wallny, R, Walter, T, Waugh, B, Weber, G, Weber, M, Wegener, D, Wegner, A, Wengler, T, Werner, M, West, LR, White, G, Wiesand, S, Wilksen, T, Winde, M, Winter, GG, Wissing, C, Wobisch, M, Wollatz, H, Wunsch, E, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zini, P, Zomer, F, Zsembery, J, zur Nedden, M, Collaboration, H, Girod, Dominique, H1 Collaboration, 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), and H1
Subjects: Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Particle physics, Photon, Luminosity (scattering theory), Proton, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Phenomenology, FOS: Physical sciences, Parton, HERA, Jet (particle physics), 01 natural sciences, High Energy Physics - Experiment, Gluon, High Energy Physics - Experiment (hep-ex), [PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 0103 physical sciences, High Energy Physics::Experiment, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Nuclear Experiment
Abstract: The production of hard di-jet events in photoproduction at HERA is dominated by resolved photon processes in which a parton in the photon with momentum fraction x_gamma is scattered from a parton in the proton. These processes are sensitive to the quark and gluon content of the photon. The differential di-jet cross-section dsigma/dlog(x_gamma) is presented here, measured in tagged photoproduction at HERA using data taken with the H1 detector, corresponding to an integrated luminosity of 7.2 pb^(-1). Using a restricted data sample at high transverse jet energy, E_(T,jet)>6 GeV, the effective parton density f_gamma,eff(x_gamma) = [q(x_gamma) + bar(q)(x_gamma) +9/4g(x_gamma)] in the photon in leading order QCD is measured down to x_gamma=0.05 from which the gluon density in the photon is derived., 19 pages, 5 figures and 2 tables
Published: 2000

38. Measurement of neutral and charged current cross-sections in positron proton collisions at large momentum transfer

Author: Adloff, C., Andreev, V., Andrieu, B., Arkadov, V., Astvatsatourov, A., Ayyaz, I., Babaev, A., Bahr, J., Baranov, P., Barrelet, E., Bartel, W., Bassler, U., Bate, P., Beglarian, A., Behnke, O., Behrend, H.J., Beier, C., Belousov, A., Berger, C., Bernardi, G., Berndt, T., Bertrand-Coremans, G., Biddulph, P., Bizot, J.C., Boudry, V., Braunschweig, W., Brisson, V., Broker, H.B., Brown, D.P., Bruckner, W., Bruel, Pascal, Bruncko, D., Burger, J., Busser, F.W., Bunyatyan, A., Burke, S., Burrage, A., Buschhorn, G., Calvet, D., Campbell, A.J., Carli, T., Chabert, E., Charlet, M., Clarke, D., Clerbaux, B., Contreras, J.G., Cormack, C., Coughlan, J.A., Cousinou, M.C., Cox, B.E., Cozzika, G., Cvach, J., Dainton, J.B., Dau, W.D., Daum, K., David, M., Davidsson, M., de Roeck, A., de Wolf, E.A., Delcourt, B., Demirchyan, R., Diaconu, C., Dirkmann, M., Dixon, P., Dodonov, V., Donovan, K.T., Dowell, J.D., Droutskoi, A., Ebert, J., Eckerlin, G., Eckstein, D., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Elsen, E., Enzenberger, M., Erdmann, M., Fahr, A.B., Faulkner, P.J.W., Favart, L., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Ferrarotto, F., Ferron, S., Fleischer, M., Flugge, G., Fomenko, A., Formanek, J., Foster, J.M., Franke, G., Gabathuler, E., Gabathuler, K., Gaede, F., Garvey, J., Gassner, J., Gayler, J., Gerhards, R., Ghazaryan, S., Glazov, A., Goerlich, L., Gogitidze, N., Goldberg, M., Gorelov, I., Grab, C., Grassler, H., Greenshaw, T., Griffiths, R.K., Grindhammer, G., Hadig, T., Haidt, D., Hajduk, L., Hampel, M., Haustein, V., Haynes, W.J., Heinemann, B., Heinzelmann, G., Henderson, R.C.W., Hengstmann, S., Henschel, H., Heremans, R., Herrera, G., Herynek, I., Hewitt, K., Hilgers, M., Hiller, K.H., Hilton, C.D., Hladky, J., Hoting, P., Hoffmann, D., Horisberger, R., Hurling, S., Ibbotson, M., Issever, C., Jacquet, M., Jaffre, M., Janauschek, L., Jansen, D.M., Joensson, L., Johnson, D.P., Jones, M., Jung, H., Kastli, H.K., Kander, M., Kant, D., Kapichine, M., Karlsson, M., Karschnick, O., Kaufmann, O., Kausch, M., Keil, F., Keller, N., Kenyon, I.R., Kermiche, S., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Kohne, J.H., Kolanoski, H., Kolya, S.D., Korbel, V., Kostka, P., Kotelnikov, S.K., Kramerkamper, T., Krasny, M.W., Krehbiel, H., Krucker, D., Kruger, K., Kupper, A., Kuster, H., Kuhlen, M., Kurca, T., Lachnit, W., Lahmann, R., Lamb, D., Landon, M.P.J., Lange, W., Langenegger, U., Lebedev, A., Lehner, F., Lemaitre, V., Lemrani, R., Lendermann, V., Levonian, S., Lindstroem, M., Lobo, G., Lobodzinska, E., Lubimov, V., Luders, S., Luke, D., Lytkin, L., Magnussen, N., Mahlke-Kruger, H., Malden, N., Malinovskii, E., Malinovski, I., Maracek, R., Marage, P., Marks, J., Marshall, R., Martyn, H.U., Martyniak, J., Maxfield, S.J., Mcmahon, T.R., Mehta, A., Meier, K., Merkel, P., Metlica, F., Meyer, A., Meyer, H., Meyer, J., Meyer, P.O., Mikocki, S., Milstead, D., Mohr, R., Mohrdieck, S., Mondragon, M.N., Moreau, F., Morozov, A., Morris, J.V., Muller, D., Muller, K., Murn, P., Nagovizin, V., Naroska, B., Naumann, J., Naumann, T., Negri, I., Newman, P.R., Nguyen, H.K., Nicholls, T.C., Niebergall, F., Niebuhr, C., Niedzballa, C., Niggli, H., Nix, O., Nowak, G., Nunnemann, T., Oberlack, H., Olsson, J.E., Ozerov, D., Palmen, P., Panassik, V., Pascaud, C., Passaggio, S., Patel, G.D., Pawletta, H., Perez, Emile, Phillips, J.P., Pieuchot, A., Pitzl, D., Poschl, R., Potashnikova, I., Povh, B., Rabbertz, K., Radel, G., Rauschenberger, J., Reimer, P., Reisert, B., Reyna, D., Riess, S., Rizvi, E., Robmann, P., Roosen, R., Rosenbauer, K., Rostovtsev, A., Royon, C., Rusakov, S., Rybicki, K., Sankey, D.P.C., Schacht, P., Scheins, J., Schilling, F.P., Schleif, S., Schleper, P., Schmidt, D., Schoeffel, L., Schorner, T., Schroder, V., Schultz-Coulon, H.C., Sefkow, F., Shekelian, V., Shevyakov, I., Shtarkov, L.N., Siegmon, G., Sirois, Y., Sloan, T., Smirnov, P., Smith, M., Solochenko, V., Solovev, Yu., Spaskov, V., Specka, A., Spitzer, H., Squinabol, F., Stamen, R., Steinhart, J., Stella, B., Stellberger, A., Stiewe, J., Straumann, U., Struczinski, W., Sutton, J.P., Swart, M., Tapprogge, S., Tasevsky, M., Chernyshov, V., Chechelnitskii, S., Thompson, G., Thompson, P.D., Tobien, N., Todenhagen, R., Traynor, D., Truol, P., Tsipolitis, G., Turnau, J., Tzamariudaki, E., Udluft, S., Usik, A., Valkar, S., Valkarova, A., Vallee, C., van Mechelen, P., Vazdik, Ya., Villet, G., Wacker, K., Wallny, R., Walter, T., Waugh, B., Weber, G., Weber, M., Wegener, D., Wegner, A., Wengler, T., Werner, M., West, L.R., White, G., Wiesand, S., Wilksen, T., Winde, M., Winter, G.G., Wissing, C., Wittek, C., Wobisch, M., Wollatz, H., Wunsch, E., Zaleisak, J., Zhang, Zhiqing, Zhokin, A., Zini, P., Zomer, F., Zsembery, J., Zur Nedden, M., 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), 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 Damoiseaux, Magali
Subjects: [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Phenomenology, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Nuclear Experiment
Abstract: The inclusive single and double differential cross-sections for neutral and charged current processes with four-momentum transfer squared Q^2 between 150 and 30,000 GeV2 and with Bjorken x between 0.0032 and 0.65 are measured in e^+ p collisions. The data were taken with the H1 detector at HERA between 1994 and 1997, and they correspond to an integrated luminosity of 35.6 pb^-1. The Q^2 evolution of the parton densities of the proton is tested, yielding no significant deviation from the prediction of perturbative QCD. The proton structure function F_2(x,Q^2) is determined. An extraction of the u and d quark distributions at high x is presented. At high Q^2 electroweak effects of the heavy bosons Z0 and W are observed and found to be consistent with Standard Model expectation.
Published: 2000

39. Elastic Electroproduction of $\rho$ Mesons at HERA

Author: Adloff, C, Andreev, V, Andrieu, B, Arkadov, V, Astvatsatourov, A, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Bassler, U, Bate, P, Beglarian, A, Behnke, O, Behrend, HJ, Beier, C, Belousov, A, Berger, C, Bernardi, G, Berndt, T, Bertrand-Coremans, G, Biddulph, P, Bizot, JC, Boudry, V, Braunschweig, W, Brisson, V, Brown, DP, Bruckner, W, Bruel, P, Bruncko, D, Burger, J, Busser, FW, Buniatian, A, Burke, S, Burrage, A, Buschhorn, G, Calvet, D, Campbell, AJ, Carli, T, Chabert, E, Charlet, M, Clarke, D, Clerbaux, B, Contreras, JG, Cormack, C, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, David, M, Davidsson, M, De Roeck, A, De Wolf, EA, Delcourt, B, Demirchyan, R, Diaconu, C, Dirkmann, M, Dixon, P, Dlugosz, W, Donovan, KT, Dowell, JD, Droutskoi, A, Ebert, J, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Elsen, E, Enzenberger, M, Erdmann, M, Fahr, AB, Faulkner, PJW, Favart, L, Fedotov, A, Felst, R, Feltesse, J, Ferencei, J, Ferrarotto, F, Fleischer, M, Flugge, G, Fomenko, A, Formanek, J, Foster, JM, Franke, G, Gabathuler, E, Gabathuler, K, Gaede, F, Garvey, J, Gassner, J, Gayler, J, Gerhards, R, Ghazaryan, S, Glazov, A, Goerlich, L, Gogitidze, N, Goldberg, M, Gorelov, I, Grab, C, Grassler, H, Greenshaw, T, Griffiths, RK, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Hampel, M, Haustein, V, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, R, Herynek, I, Hewitt, K, Hiller, KH, Hilton, CD, Hladky, J, Hoffmann, D, Horisberger, R, Hurling, S, Ibbotson, M, Issever, C, Jacquet, M, Jaffre, M, Janauschek, L, Jansen, DM, Jonsson, L, Johnson, DP, Jones, M, Jung, H, Kastli, HK, Kander, M, Kant, D, Kapichine, M, Karlsson, M, Karschnik, O, Katzy, J, Kaufmann, O, Kausch, M, Keller, N, Kenyon, IR, Kermiche, S, Keuker, C, Kiesling, C, Klein, M, Kleinwort, C, Knies, G, Kohne, JH, Kolanoski, H, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Kramerkamper, T, Krasny, MW, Krehbiel, H, Krucker, D, Kruger, K, Kupper, A, Kuster, H, Kuhlen, M, Kurca, T, Lachnit, W, Lahmann, R, Lamb, D, Landon, MPJ, Lange, W, Langenegger, U, Lebedev, A, Lehner, F, Lemaitre, V, Lemrani, R, Lendermann, V, Levonian, S, Lindstroem, M, Lobo, G, Lobodzinska, E, Lubimov, V, Luders, S, Luke, D, Lytkin, L, Magnussen, N, Mahlke-Kruger, H, Malden, N, Malinovski, E, Malinovski, I, Maracek, R, Marage, P, Marks, J, Marshall, R, Martyn, HU, Martyniak, J, Maxfield, SJ, McMahon, TR, Mehta, A, Meier, K, Merkel, P, Metlica, F, Meyer, A, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Mohr, R, Mohrdieck, S, Mondragon, M, Moreau, F, Morozov, A, Morris, JV, Muller, D, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, J, Naumann, T, Negri, I, Newman, PR, Nguyen, HK, Nicholls, TC, Niebergall, F, Niebuhr, C, Niedzballa, C, Niggli, H, Nix, O, Nowak, G, Nunnemann, T, Oberlack, H, Olsson, JE, Ozerov, D, Palmen, P, Panassik, V, Pascaud, C, Passaggio, S, Patel, GD, Pawletta, H, Perez, E, Phillips, JP, Pieuchot, A, Pitzl, D, Poschl, R, Pope, G, Povh, B, Rabbertz, K, Rauschenberger, J, Reimer, P, Reisert, B, Reyna, D, Rick, H, Riess, S, Rizvi, E, Robmann, P, Roosen, R, Rosenbauer, K, Rostovtsev, A, Rouse, F, Royon, C, Rusakov, S, Rybicki, K, Sankey, DPC, Schacht, P, Scheins, J, Schilling, FP, Schleif, S, Schleper, P, Schmidt, D, Schoeffel, L, Schroder, V, Schultz-Coulon, HC, Sefkow, F, Semenov, A, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Siegmon, G, Sirois, Y, Sloan, T, Smirnov, P, Smith, M, Solochenko, V, Soloviev, Y, Spaskov, V, Specka, A, Spitzer, H, Squinabol, F, Stamen, R, Steffen, P, Steinberg, R, Steinhart, J, Stella, B, Stellberger, A, Stiewe, J, Straumann, U, Struczinski, W, Sutton, JP, Swart, M, Tapprogge, S, Tasevsky, M, Tchernyshov, V, Tchetchelnitski, S, Theissen, J, Thompson, G, Thompson, PD, Tobien, N, Todenhagen, R, Traynor, D, Truol, P, Tsipolitis, G, Turnau, J, Tzamariudaki, E, Udluft, S, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Esch, P, Van Haecke, A, Van Mechelen, P, Vazdik, Y, Villet, G, Wacker, K, Wallny, R, Walter, T, Waugh, B, Weber, G, Weber, M, Wegener, D, Wegner, A, Wengler, T, Werner, M, West, LR, White, G, Wiesand, S, Wilksen, T, Willard, S, Winde, M, Winter, GG, Wissing, C, Wittek, C, Wittmann, E, Wobisch, M, Wollatz, H, Wunsch, E, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zini, P, Zomer, F, Zsembery, J, zur Nedden, M, Collaboration, H, 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), 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 Damoiseaux, Magali
Subjects: Physics, Particle physics, Photon, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics and Astronomy (miscellaneous), Meson, Mass distribution, 010308 nuclear & particles physics, Hadron, FOS: Physical sciences, HERA, 01 natural sciences, 7. Clean energy, Helicity, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Amplitude, 0103 physical sciences, Mass spectrum, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, Nuclear Experiment, Engineering (miscellaneous)
Abstract: The elastic electroproduction of rho mesons is studied at HERA with the H1 detector for a photon virtuality in the range 1 < Q^2 < 60 GeV^2 and for a hadronic centre of mass energy in the range 30 < W < 140 GeV. The shape of the pipi mass distribution in the rho resonance region is measured as a function of Q^2. The full set of rho spin density matrix elements is determined, and evidence is found for a helicity flip amplitude at the level of 8 +- 3 % of the non-flip amplitudes. Measurements are presented of the dependence of the cross section on Q^2, W and t (the four-momentum transfer squared to the proton). They suggest that, especially at large Q^2, the gamma^*p cross section develops a stronger W dependence than that expected from the behaviour of elastic and total hadron-hadron cross sections., 55 pages, 24 figures, 13 tables submitted to Eur. Phys. J C
Published: 2000

40. Elastic Photoproduction of $J/\psi$ and $\Upsilon$ Mesons at HERA

Author: Adloff, C., Andreev, V., Andrieu, B., Arkadov, V., Astvatsatourov, A., Ayyaz, I., Babaev, A., Bahr, J., Baranov, P., Barrelet, E., Bartel, W., Bassler, U., Bate, P., Beglarian, A., Behnke, O., Beier, C., Belousov, A., Benisch, T., Berger, C., Bernardi, G., Berndt, T., Bizot, J.C., Borras, K., Boudry, V., Braunschweig, W., Brisson, V., Broker, H.B., Brown, D.P., Bruckner, W., Bruel, Pascal, Bruncko, D., Burger, J., Busser, F.W., Bunyatian, A., Burkhardt, Hans, Burrage, A., Buschhorn, G., Campbell, A.J., Cao, J., Carli, T., Caron, S., Chabert, E., Clarke, D., Clerbaux, B., Collard, C., Contreras, J.G., Coughlan, J.A., Cousinou, M.C., Cox, B.E., Cozzika, G., Cvach, J., Dainton, J.B., Dau, W.D., Daum, K., David, M., Davidsson, M., Delcourt, B., Delerue, N., Demirchyan, R., de Roeck, A., de Wolf, E.A., Diaconu, C., Dixon, P., Dodonov, V., Dowell, J.D., Droutskoi, A., Duprel, C., Eckerlin, G., Eckstein, D., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Ellerbrock, M., Elsen, E., Erdmann, M., Erdmann, W., Faulkner, P.J.W., Favart, L., Fedotov, A., Felst, R., Ferencei, J., Ferron, S., Fleischer, M., Flugge, G., Fomenko, A., Foresti, I., Formanek, J., Foster, J.M., Franke, G., Gabathuler, E., Gabathuler, K., Garvey, J., Gassner, J., Gayler, J., Gerhards, R., Ghazarian, S., Goerlich, L., Gogitidze, N., Goldberg, M., Goodwin, C., Grab, C., Grassler, H., Greenshaw, T., Grindhammer, G., Hadig, T., Haidt, D., Hajduk, L., Hauschildt, T., Haynes, W.J., Heinemann, B., Heinzelmann, G., Henderson, R.C.W., Hengstmann, S., Henschel, H., Heremans, R., Herrera, G., Herynek, I., Hilgers, M., Hiller, K.H., Hilton, C.D., Hladky, J., Hoting, P., Hoffmann, D., Hoprich, W., Horisberger, R., Hurling, S., Ibbotson, M., Jacquet, M., Jaffre, M., Janauschek, L., Jansen, D.M., Janssen, X., Jemanov, V., Jonsson, L., Johnson, D.P., Jones, M.A.S., Jung, H., Kastli, H.K., Kant, D., Kapichine, M., Karlsson, M., Karschnick, O., Kaufmann, O., Kausch, M., Keil, F., Keller, N., Kennedy, J., Kenyon, I.R., Kermiche, S., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Koblitz, B., Kolanoski, H., Kolya, S.D., Korbel, V., Kostka, P., Kotelnikov, S.K., Krasny, M.W., Krehbiel, H., Kroseberg, J., Krucker, D., Kruger, K., Kupper, A., Kuhr, T., Kurca, T., Kutuev, R., Lachnit, W., Lahmann, R., Lamb, D., Landon, M.P.J., Lange, W., Lastovicka, T., Lebedev, A., Leissner, B., Lemrani, R., Lendermann, V., Levonian, S., Lindstrom, M., List, B., Lobodzinska, E., Lobodzinski, B., Loktionova, N., Lubimov, V., Luders, S., Luke, D., Lytkin, L., Magnussen, N., Mahlke-Kruger, H., Malden, N., Malinovski, E., Malinovski, I., Maracek, R., Marage, P., Marks, J., Marshall, R., Martyn, H.U., Martyniak, J., Maxfield, S.J., Mehta, A., Meier, K., Merkel, P., Metlica, F., Meyer, A., Meyer, H., Meyer, J., Meyer, P.O., Mikocki, S., Milstead, D., Mkrtchyan, T., Mohr, R., Mohrdieck, S., Mondragon, M.N., Moreau, F., Morozov, A., Morris, J.V., Muller, D., Muller, K., Murin, P., Nagovizin, V., Naroska, B., Naumann, J., Naumann, T., Negri, I., Nellen, G., Newman, P.R., Nicholls, T.C., Niebergall, F., Niebuhr, C., Nix, O., Nowak, G., Nunnemann, T., Olsson, J.E., Ozerov, D., Panassik, V., Pascaud, C., Patel, G.D., Perez, Emile, Phillips, J.P., Pitzl, D., Poschl, R., Potachnikova, I., Povh, B., Rabbertz, K., Radel, G., Rauschenberger, J., Reimer, P., Reisert, B., Reyna, D., Riess, S., Rizvi, E., Robmann, P., Roosen, R., Rostovtsev, A., Royon, C., Rusakov, S., Rybicki, K., Sankey, D.P.C., Scheins, J., Schilling, F.P., Schleif, S., Schleper, P., Schmidt, D., Schoeffel, L., Schoning, A., Schorner, T., Schroder, V., Schultz-Coulon, H.C., Sedlak, K., Sefkow, F., Shekelian, V., Sheviakov, I., Shtarkov, L.N., Siegmon, G., Sievers, P., Sirois, Y., Sloan, T., Smirnov, P., Solochenko, V., Solovev, Y., Spaskov, V., Specka, A., Spitzer, H., Stamen, R., Steinhart, J., Stella, B., Stellberger, A., Stiewe, J., Straumann, U., Struczinski, W., Swart, M., Tasevsky, M., Tchernyshov, V., Tchetchelnitski, S., Thompson, G., Thompson, P.D., Tobien, N., Traynor, D., Truol, P., Tsipolitis, G., Turnau, J., Turney, J.E., Tzamariudaki, E., Udluft, S., Usik, A., Valkar, S., Valkarova, A., Vallee, C., van Mechelen, P., Vazdik, Y., von Dombrowski, S., Wacker, K., Wallny, R., Walter, T., Waugh, B., Weber, G., Weber, M., Wegener, D., Wegner, A., Wengler, T., Werner, M., White, G., Wiesand, S., Wilksen, T., Winde, M., Winter, G.G., Wissing, C., Wobisch, M., Wollatz, H., Wunsch, E., Wyatt, A.C., Zacek, J., Zalesak, J., Zhang, Zhiqing, Zhokin, A., Zomer, F., Zsembery, J., Zur Nedd, M., 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: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published: 2000

41. Measurement of Dijet Cross-Sections at Low $Q^{2}$ and the Extraction of an Effective Parton Density for the Virtual Photon

Author: Adloff, C., Andreev, V., Andrieu, B., Arkadov, V., Astvatsatourov, A., Ayyaz, I., Babaev, A., Bahr, J., Baranov, P., Barrelet, E., Bartel, W., Bassler, U., Bate, P., Beglarian, A., Behnke, O., Behrend, H.J., Beier, C., Belousov, A., Berger, C., Bernardi, G., Berndt, T., Bertrand-Coremans, G., Biddulph, P., Bizot, J.C., Boudry, V., Braunschweig, W., Brisson, V., Brown, D.P., Bruckner, W., Bruel, Pascal, Bruncko, D., Burger, J., Busser, F.W., Buniatian, A., Burke, S., Burrage, A., Buschhorn, G., Calvet, D., Campbell, A.J., Carli, T., Chabert, E., Charlet, M., Chyla, J., Clarke, D., Clerbaux, B., Contreras, J.G., Cormack, C., Coughlan, J.A., Cousinou, M.C., Cox, B.E., Cozzika, G., Cvach, J., Dainton, J.B., Dau, W.D., Daum, K., David, M., Davidsson, M., De Roeck, A., De Wolf, E.A., Delcourt, B., Demirchian, R., Diaconu, C., Dirkmann, M., Dixon, P., Dlugosz, W., Donovan, K.T., Dowell, J.D., Droutskoi, A., Ebert, J., Eckerlin, G., Eckstein, D., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Elsen, E., Enzenberger, M., Erdmann, M., Fahr, A.B., Faulkner, P.J.W., Favart, L., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Ferrarotto, F., Fleischer, M., Flugge, G., Fomenko, A., Formanek, J., Foster, J.M., Franke, G., Gabathuler, E., Gabathuler, K., Gaede, F., Garvey, J., Gassner, J., Gayler, J., Gerhards, R., Ghazaryan, S., Glazov, A., Goerlich, L., Gogitidze, N., Goldberg, M., Gorelov, I., Grab, C., Grassler, H., Greenshaw, T., Griffiths, R.K., Grindhammer, G., Hadig, T., Haidt, D., Hajduk, L., Hampel, M., Haustein, V., Haynes, W.J., Heinemann, B., Heinzelmann, G., Henderson, R.C.W., Hengstmann, S., Henschel, H., Heremans, R., Herynek, I., Hewitt, K., Hiller, K.H., Hilton, C.D., Hladky, J., Hoffmann, D., Horisberger, R., Hurling, S., Ibbotson, M., Issever, C., Jacquet, M., Jaffre, M., Janauschek, L., Jansen, D.M., Jonsson, L., Johnson, D.P., Jones, M., Jung, H., Kastli, H.K., Kander, M., Kant, D., Kapichine, M., Karlsson, M., Karschnik, O., Katzy, J., Kaufmann, O., Kausch, M., Keller, N., Kenyon, I.R., Kermiche, S., Keuker, C., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Kohne, J.H., Kolanoski, H., Kolya, S.D., Korbel, V., Kostka, P., Kotelnikov, S.K., Kramerkamper, T., Krasny, M.W., Krehbiel, H., Krucker, D., Kruger, K., Kupper, A., Kuster, H., Kuhlen, M., Kurca, T., Lachnit, W., Lahmann, R., Lamb, D., Landon, M.P.J., Lange, W., Langenegger, U., Lebedev, A., Lehner, F., Lemaitre, V., Lemrani, R., Lendermann, V., Levonian, S., Lindstroem, M., Lobo, G., Lobodzinska, E., Lubimov, V., Luders, S., Luke, D., Lytkin, L., Magnussen, N., Mahlke-Kruger, H., Malden, N., Malinovskii, E., Malinovski, I., Maracek, R., Marage, P., Marks, J., Marshall, R., Martyn, H.U., Martyniak, J., Maxfield, S.J., McMahon, T.R., Mehta, A., Meier, K., Merkel, P., Metlica, F., Meyer, A., Meyer, H., Meyer, J., Meyer, P.O., Mikocki, S., Milstead, D., Mohr, R., Mohrdieck, S., Mondragon, M., Moreau, F., Morozov, A., Morris, J.V., Muller, D., Muller, K., Murin, P., Nagovizin, V., Naroska, B., Naumann, J., Naumann, T., Negri, I., Newman, P.R., Nguyen, H.K., Nicholls, T.C., Niebergall, F., Niebuhr, C., Niedzballa, C., Niggli, H., Nix, O., Nowak, G., Nunnemann, T., Oberlack, H., Olsson, J.E., Ozerov, D., Palmen, P., Panassik, V., Pascaud, C., Passaggio, S., Patel, G.D., Pawletta, H., Perez, Emile, Phillips, J.P., Pieuchot, A., Pitzl, D., Poschl, R., Pope, G., Povh, B., Rabbertz, K., Rauschenberger, J., Reimer, P., Reisert, B., Reyna, D., Rick, H., Riess, S., Rizvi, E., Robmann, P., Roosen, R., Rosenbauer, K., Rostovtsev, A., Rouse, F., Royon, C., Rusakov, S., Rybicki, K., Sankey, D.P.C., Schacht, P., Scheins, J., Schilling, F.P., Schleif, S., Schleper, P., Schmidt, D., Schoeffel, L., Schroder, V., Schultz-Coulon, H.C., Sefkow, F., Semenov, A., Shekelian, V., Shevyakov, I., Shtarkov, L.N., Siegmon, G., Sirois, Y., Sloan, T., Smirnov, P., Smith, M., Solochenko, V., Solovev, Yu., Spaskov, V., Specka, A., Spitzer, H., Squinabol, F., Stamen, R., Steffen, P., Steinberg, R., Steinhart, J., Stella, B., Stellberger, A., Stiewe, J., Straumann, U., Struczinski, W., Sutton, J.P., Swart, M., Tapprogge, S., Tasevsky, M., Chernyshov, V., Chechelnitskii, S., Theissen, J., Thompson, G., Thompson, P.D., Tobien, N., Todenhagen, R., Traynor, D., Truol, P., Tsipolitis, G., Turnau, J., Tzamariudaki, E., Udluft, S., Usik, A., Valkar, S., Valkarova, A., Vallee, C., Van Esch, P., Van Haecke, A., Van Mechelen, P., Vazdik, Ya., Villet, G., Wacker, K., Wallny, R., Walter, T., Waugh, B., Weber, G., Weber, M., Wegener, D., Wegner, A., Wengler, T., Werner, M., West, L.R., White, G., Wiesand, S., Wilksen, T., Willard, S., Winde, M., Winter, G.G., Wissing, C., Wittek, C., Wittmann, E., Wobisch, M., Wollatz, H., Wunsch, E., Zacek, J., Zalesak, J., Zhang, Zhiqing, Zhokin, A., Zini, P., Zomer, F., Zsembery, J., Zur Nedden, M., 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: High Energy Physics - Experiment (hep-ex), [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], FOS: Physical sciences, High Energy Physics::Experiment, High Energy Physics - Experiment
Abstract: The triple-differential dijet cross-section, d^3 sigma_{ep}/dQ2 dE_t2 dxgjets, is measured with the H1 detector at HERA as a function of the photon virtuality Q^2, the fraction of the photon's momentum carried by the parton entering the hard scattering, xgjets, and the square of the mean transverse energy, E_t2, of the two highest E_t jets. Jets are found using a longitudinal boost-invariant k_T clustering algorithm in the gamma* p center of mass frame. The measurements cover the ranges 1.6 < Q^2 < 80 GeV$^2 in virtuality and 0.1 < y < 0.7 in inelasticity y. The results are well described by leading order QCD models which include the effects of a resolved component to the virtual photon. Models which treat the photon as point-like fail to describe the data. An effective leading order parton density for the virtual photon is extracted as a function of the photon virtuality, the probing scale and the parton momentum fraction. The x_gamma and probing scale dependences of the parton density show characteristic features of photon structure, and a suppression of this structure with increasing Q^2 is seen., 32 pages, 10 figures, 4 tables, submitted to Eur. Phys. J. C
Published: 2000

42. Measurements of transverse energy flow in deep inelastic scattering at Hera

Author: Adloff, C., Andreev, V., Andrieu, B., Arkadov, V., Astvatsatourov, A., Ayyaz, I., Babaev, A., Bahr, J., Baranov, P., Barrelet, E., Bartel, W., Bassler, U., Bate, P., Beglarian, A., Behnke, O., Behrend, H.J., Beier, C., Belousov, A., Berger, C., Bernardi, G., Berndt, T., Bertrand-Coremans, G., Biddulph, P., Bizot, J.C., Boudry, V., Braunschweig, W., Brisson, V., Broker, H.B., Brown, D.P., Bruckner, W., Bruel, Pascal, Bruncko, D., Burger, J., Busser, F.W., Bunyatian, A., Burke, S., Burrage, A., Buschhorn, G., Calvet, D., Campbell, A.J., Carli, T., Chabert, E., Charlet, M., Clarke, D., Clerbaux, B., Contreras, J.G., Cormack, C., Coughlan, J.A., Cousinou, M.C., Cox, B.E., Cozzika, G., Cvach, J., Dainton, J.B., Dau, W.D., Daum, K., David, M., Davidsson, M., De Roeck, A., De Wolf, E.A., Delcourt, B., Demirchyan, R., Diaconu, C., Dirkmann, M., Dixon, P., Dodonov, V., Donovan, K.T., Dowell, J.D., Droutskoi, A., Ebert, J., Eckerlin, G., Eckstein, D., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Elsen, E., Enzenberger, M., Erdmann, M., Fahr, A.B., Faulkner, P.J.W., Favart, L., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Ferrarotto, F., Ferron, S., Fleischer, M., Flugge, G., Fomenko, A., Formanek, J., Foster, J.M., Franke, G., Gabathuler, E., Gabathuler, K., Gaede, F., Garvey, J., Gassner, J., Gayler, J., Gerhards, R., Ghazaryan, S., Glazov, A., Goerlich, L., Gogitidze, N., Goldberg, M., Gorelov, I., Grab, C., Grassler, H., Greenshaw, T., Griffiths, R.K., Grindhammer, G., Hadig, T., Haidt, D., Hajduk, L., Hampel, M., Haustein, V., Haynes, W.J., Heinemann, B., Heinzelmann, G., Henderson, R.C.W., Hengstmann, S., Henschel, H., Heremans, R., Herrera, G., Herynek, I., Hewitt, K., Hilgers, M., Hiller, K.H., Hilton, C.D., Hladky, J., Hoting, P., Hoffmann, D., Horisberger, R., Hurling, S., Ibbotson, M., Issever, C., Jacquet, M., Jaffre, M., Janauschek, L., Jansen, D.M., Jonsson, L., Johnson, D.P., Jones, M., Jung, H., Kastli, H.K., Kander, M., Kant, D., Kapichine, M., Karlsson, M., Karschnick, O., Kaufmann, O., Kausch, M., Keil, F., Keller, N., Kenyon, I.R., Kermiche, S., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Kohne, J.H., Kolanoski, H., Kolya, S.D., Korbel, V., Kostka, P., Kotelnikov, S.K., Kramerkamper, T., Krasny, M.W., Krehbiel, H., Krucker, D., Kruger, K., Kupper, A., Kuster, H., Kuhlen, M., Kurca, T., Lachnit, W., Lahmann, R., Lamb, D., Landon, M.P.J., Lange, W., Langenegger, U., Lebedev, A., Lehner, F., Lemaitre, V., Lemrani, R., Lendermann, V., Levonian, S., Lindstroem, M., Lobo, G., Lobodzinska, E., Lubimov, V., Luders, S., Luke, D., Lytkin, L., Magnussen, N., Mahlke-Kruger, H., Malden, N., Malinovskii, E., Malinovski, I., Maracek, R., Marage, P., Marks, J., Marshall, R., Martyn, H.U., Martyniak, J., Maxfield, S.J., McMahon, T.R., Mehta, A., Meier, K., Merkel, P., Metlica, F., Meyer, A., Meyer, H., Meyer, J., Meyer, P.O., Mikocki, S., Milstead, D., Mohr, R., Mohrdieck, S., Mondragon, M.N., Moreau, F., Morozov, A., Morris, J.V., Muller, D., Muller, K., Murin, P., Nagovizin, V., Naroska, B., Naumann, J., Naumann, T., Negri, I., Newman, P.R., Nguyen, H.K., Nicholls, T.C., Niebergall, F., Niebuhr, C., Niedzballa, C., Niggli, H., Nix, O., Nowak, G., Nunnemann, T., Oberlack, H., Olsson, J.E., Ozerov, D., Palmen, P., Panassik, V., Pascaud, C., Passaggio, S., Patel, G.D., Pawletta, H., Perez, Emile, Phillips, J.P., Pieuchot, A., Pitzl, D., Poschl, R., Potashnikova, I., Povh, B., Rabbertz, K., Radel, G., Rauschenberger, J., Reimer, P., Reisert, B., Reyna, D., Riess, S., Rizvi, E., Robmann, P., Roosen, R., Rosenbauer, K., Rostovtsev, A., Royon, C., Rusakov, S., Rybicki, K., Sankey, D.P.C., Schacht, P., Scheins, J., Schilling, F.P., Schleif, S., Schleper, P., Schmidt, D., Schoeffel, L., Schorner, T., Schroder, V., Schultz-Coulon, H.C., Sefkow, F., Shekelian, V., Sheviakov, I., Shtarkov, L.N., Siegmon, G., Sirois, Y., Sloan, T., Smirnov, P., Smith, M., Solochenko, V., Solovev, Yu., Spaskov, V., Specka, A., Spitzer, H., Squinabol, F., Stamen, R., Steinhart, J., Stella, B., Stellberger, A., Stiewe, J., Straumann, U., Struczinski, W., Sutton, J.P., Swart, M., Tapprogge, S., Tasevsky, M., Chernyshov, V., Chechelnitski, S., Thompson, G., Thompson, P.D., Tobien, N., Todenhagen, R., Traynor, D., Truol, P., Tsipolitis, G., Turnau, J., Tzamariudaki, E., Udluft, S., Usik, A., Valkar, S., Valkarova, A., Vallee, C., Van Haecke, A., Van Mechelen, P., Vazdik, Ya., Villet, G., Wacker, K., Wallny, R., Walter, T., Waugh, B., Weber, G., Weber, M., Wegener, D., Wegner, A., Wengler, T., Werner, M., West, L.R., White, G., Wiesand, S., Wilksen, T., Winde, M., Winter, G.G., Wissing, C., Wittek, C., Wobisch, M., Wollatz, H., Wunsch, E., Zacek, J., Zalesak, J., Zhang, Zhiqing, Zhokin, A., Zini, P., Zomer, F., Zsembery, J., Zur Nedden, M., 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, Damoiseaux, Magali, 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: [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Nuclear Experiment
Abstract: Measurements of transverse energy flow are presented for neutral current deep-inelastic scattering events produced in positron-proton collisions at HERA. The kinematic range covers squared momentum transfers Q^2 from 3.2 to 2,200 GeV^2, the Bjorken scaling variable x from 8.10^{-5} to 0.11 and the hadronic mass W from 66 to 233 GeV. The transverse energy flow is measured in the hadronic centre of mass frame and is studied as a function of Q^2, x, W and pseudorapidity. A comparison is made with QCD based models. The behaviour of the mean transverse energy in the central pseudorapidity region and an interval corresponding to the photon fragmentation region are analysed as a function of Q^2 and W.
Published: 2000

43. Dijet event rates in deep inelastic scattering at Hera

Author: Adloff, C., Anderson, M., Andreev, V., Andrieu, B., Arkadov, V., Ayyaz, I., Babaev, A., Bahr, J., Ban, J., Baranov, P., Barrelet, E., Barschke, R., Bartel, W., Bassler, U., Bate, P., Beck, M., Beglarian, A., Behnke, O., Behrend, H.J., Beier, C., Belousov, A., Berger, C., Bernardi, G., Bertrand-Coremans, G., Biddulph, P., Bizot, J.C., Borras, K., Boudry, V., Braemer, A., Braunschweig, W., Brisson, V., Brown, D.P., Bruckner, W., Bruel, Pascal, Bruncko, D., Burger, J., Busser, F.W., Buniatian, A., Burke, S., Buschhorn, G., Calvet, D., Campbell, A.J., Carli, T., Chabert, E., Charlet, M., Clarke, D., Clerbaux, B., Cocks, S., Contreras, J.G., Cormack, C., Coughlan, J.A., Cousinou, M.C., Cox, B.E., Cozzika, G., Cvach, J., Dainton, J.B., Dau, W.D., Daum, K., David, M., de Roeck, A., de Wolf, E.A., Delcourt, B., Diaconu, C., Dirkmann, M., Dixon, P., Dlugosz, W., Donovan, K.T., Dowell, J.D., Droutskoi, A., Ebert, J., Eckerlin, G., Eckstein, D., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Elsen, E., Enzenberger, M., Erdmann, M., Fahr, A.B., Favart, L., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Ferrarotto, F., Flamm, K., Fleischer, M., Flugge, G., Fomenko, A., Formanek, J., Foster, J.M., Franke, G., Gabathuler, E., Gabathuler, K., Gaede, F., Garvey, J., Gayler, J., Gebauer, M., Gerhards, R., Ghazarian, S., Glazov, A., Goerlich, L., Gogitidze, N., Goldberg, M., Gorelov, I., Grab, C., Grassler, H., Greenshaw, T., Griffiths, R.K., Grindhammer, G., Grober, C., Hadig, T., Haidt, D., Hajduk, L., Haller, T., Hampel, M., Haustein, V., Haynes, W.J., Heinemann, B., Heinzelmann, G., Henderson, R.C.W., Hengstmann, S., Henschel, H., Heremans, R., Herynek, I., Hewitt, K., Hiller, K.H., Hilton, C.D., Hladky, J., Hoffmann, D., Holtom, T., Horisberger, R., Hudgson, V.L., Hurling, S., Ibbotson, M., Issever, C., Itterbeck, H., Jacquet, M., Jaffre, M., Jansen, D.M., Jonsson, L., Johnson, D.P., Jung, H., Kander, M., Kant, D., Kathage, U., Katzy, J., Kaufmann, O., Kaufmann, H.H., Kausch, M., Kenyon, I.R., Kermiche, S., Keuker, C., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Kohne, J.H., Kolanoski, H., Kolya, S.D., Korbel, V., Kostka, P., Kotelnikov, S.K., Kramerkamper, T., Krasny, M.W., Krehbiel, H., Krucker, D., Kupper, A., Kuster, H., Kuhlen, M., Kurca, T., Laforge, B., Lahmann, R., Landon, M.P.J., Lange, W., Langenegger, U., Lebedev, A., Lehmann, M., Lehner, F., Lemaitre, V., Levonian, S., Lindstroem, M., List, B., Lobo, G., Lubimov, V., Luke, D., Lytkin, L., Magnussen, N., Mahlke-Kruger, H., Malinovski, E., Maracek, R., Marage, P., Marks, J., Marshall, R., Martin, G., Martin, Roland, Martyn, H.U., Martyniak, J., Maxfield, S.J., Mcmahon, S.J., Mcmahon, T.R., Mehta, A., Meier, K., Merkel, P., Metlica, F., Meyer, A., Meyer, H., Meyer, J., Meyer, P.O., Migliori, A., Mikocki, S., Milstead, D., Moeck, J., Mohr, R., Mohrdieck, S., Moreau, F., Morris, J.V., Mroczko, E., Muller, D., Muller, K., Murin, P., Nagovizin, V., Naroska, B., Naumann, T., Negri, I., Newman, P.R., Newton, D., Nguyen, H.K., Nicholls, T.C., Niebergall, F., Niebuhr, C., Niedzballa, C., Niggli, H., Nix, O., Nowak, G., Nunnemann, T., Oberlack, H., Olsson, J.E., Ozerov, D., Palmen, P., Panaro, E., Panitch, A., Pascaud, C., Passaggio, S., Patel, G.D., Pawletta, H., Peppel, E., Perez, Emile, Phillips, J.P., Pieuchot, A., Pitzl, D., Poschl, R., Pope, G., Povh, B., Rabbertz, K., Reimer, P., Reisert, B., Rick, H., Riess, S., Rizvi, E., Robmann, P., Roosen, R., Rosenbauer, K., Rostovtsev, A., Rouse, F., Royon, C., Rusakov, S., Rybicki, K., Sankey, D.P.C., Schacht, P., Scheins, J., Schiek, S., Schleif, S., Schleper, P., Schmidt, D., Schmidt, G., Schoeffel, L., Schoning, A., Schroder, V., Schultz-Coulon, H.C., Schwab, B., Sefkow, F., Semenov, A., Shekelian, V., Sheviakov, I., Shtarkov, L.N., Siegmon, G., Sirois, Y., Sloan, T., Smirnov, P., Smith, M., Solochenko, V., Solovev, Y., Specka, A., Spiekermann, J., Spitzer, H., Squinabol, F., Steffen, P., Steinberg, R., Steinhart, J., Stella, B., Stellberger, A., Stiewe, J., Straumann, U., Struczinski, W., Sutton, J.P., Swart, M., Tapprogge, S., Tasevsky, M., Chernyshov, V., Chetchelnitski, S., Theissen, J., Thompson, G., Thompson, P.D., Tobien, N., Todenhagen, R., Truol, P., Tsipolitis, G., Turnau, J., Tzamariudaki, E., Udluft, S., Usik, A., Valkar, S., Valkarova, A., Vallee, C., van Esch, P., van Mechelen, P., Vazdik, Ya., Villet, G., Wacker, K., Wallny, R., Walter, T., Waugh, B., Weber, G., Weber, M., Wegener, D., Wegner, A., Wengler, T., Werner, M., West, L.R., Wiesand, S., Wilksen, T., Willard, S., Winde, M., Winter, G.G., Wittek, C., Wittmann, E., Wobisch, M., Wollatz, H., Wunsch, E., Zacek, J., Zalesak, J., Zhang, Zhiqing, Zhokin, A., Zini, P., Zomer, F., Zsembery, J., Zur Nedde, M., Kerec, Hélène, 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: media economics, deregulation, media, regulation
Published: 2000

44. Investigation of power corrections to event shape variables measured in deep inelastic scattering

Author: Adloff, C., Andreev, V., Andrieu, B., Arkadov, V., Astvatsatourov, A., Ayyaz, I., Babaev, A., Bahr, J., Baranov, P., Barrelet, E., Bartel, W., Bassler, U., Bate, P., Behnke, O., Beier, C., Belousov, A., Benisch, T., Berger, C., Bernardi, G., Berndt, T., Bertrand-Coremans, G., Biddulph, P., Bizot, J.C., Borras, K., Boudry, V., Braunschweig, W., Brisson, V., Broker, H.B., Brown, D.P., Bruckner, W., Bruel, Pascal, Bruncko, D., Burger, J., Busser, F.W., Bunyatian, A., Burke, S., Burkhardt, Hans, Burrage, A., Buschhorn, G., Campbell, A.J., Cao, J., Carli, T., Chabert, E., Charlet, M., Clarke, D., Clerbaux, B., Collard, C., Contreras, J.G., Coughlan, J.A., Cousinou, M.C., Cox, B.E., Cozzika, G., Cvach, J., Dainton, J.B., Dau, W.D., Daum, K., David, M., Davidsson, M., Delcourt, B., de Roeck, A., de Wolf, E.A., Diaconu, C., Dixon, P., Dodonov, V., Donovan, K.T., Dowell, J.D., Droutskoi, A., Duprel, C., Ebert, J., Eckerlin, G., Eckstein, D., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Ellerbrock, M., Elsen, E., Erdmann, M., Fahr, A.B., Faulkner, P.J.W., Favart, L., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Ferrarotto, F., Ferron, S., Fleischer, M., Flugge, G., Fomenko, A., Foresti, I., Formanek, J., Foster, J.M., Franke, G., Gabathuler, E., Gabathuler, K., Garvey, J., Gassner, J., Gayler, J., Gerhards, R., Glazov, A., Goerlich, L., Gogitidze, N., Goldberg, M., Gorelov, I., Grab, C., Grassler, H., Greenshaw, T., Griffiths, R.K., Grindhammer, G., Hadig, T., Haidt, D., Hajduk, L., Haustein, V., Haynes, W.J., Heinemann, B., Heinzelmann, G., Henderson, R.C.W., Hengstmann, S., Henschel, H., Heremans, R., Herrera, G., Herynek, I., Hilgers, M., Hiller, K.H., Hilton, C.D., Hladky, J., Hoting, P., Hoffmann, D., Horisberger, R., Hurling, S., Ibbotson, M., Issever, C., Jacquet, M., Jaffre, M., Janauschek, L., Jansen, D.M., Janssen, X., Jonsson, L., Johnson, D.P., Jones, M., Jung, H., Kastli, H.K., Kant, D., Kapichine, M., Karlsson, M., Karschnick, O., Kaufmann, O., Kausch, M., Keil, F., Keller, N., Kenyon, I.R., Kermiche, S., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Kolanoski, H., Kolya, S.D., Korbel, V., Kostka, P., Kotelnikov, S.K., Krasny, M.W., Krehbiel, H., Kroseberg, J., Krucker, D., Kruger, K., Kupper, A., Kuhr, T., Kurca, T., Lachnit, W., Lahmann, R., Lamb, D., Landon, M.P.J., Lange, W., Lebedev, A., Lehner, F., Lemaitre, V., Lemrani, R., Lendermann, V., Levonian, S., Lindstrom, M., Lobo, G., Lobodzinska, E., Lubimov, V., Luders, S., Luke, D., Lytkin, L., Magnussen, N., Mahlke-Kruger, H., Malden, N., Malinovsky, E., Malinovski, I., Maracek, R., Marage, P., Marks, J., Marshall, R., Martyn, H.U., Martyniak, J., Maxfield, S.J., Mcmahon, T.R., Mehta, A., Meier, K., Merkel, P., Metlica, F., Meyer, A., Meyer, H., Meyer, J., Meyer, P.O., Mikocki, S., Milstead, D., Mohr, R., Mohrdieck, S., Mondragon, M.N., Moreau, F., Morozov, A., Morris, J.V., Muller, D., Muller, K., Murin, P., Nagovizin, V., Naroska, B., Naumann, J., Naumann, T., Negri, I., Newman, P.R., Nguyen, H.K., Nicholls, T.C., Niebergall, F., Niebuhr, C., Nix, O., Nowak, G., Nunnemann, T., Olsson, J.E., Ozerov, D., Panassik, V., Pascaud, C., Passaggio, S., Patel, G.D., Perez, Emile, Phillips, J.P., Pitzl, D., Poschl, R., Potashnikova, I., Povh, B., Rabbertz, K., Radel, G., Rauschenberger, J., Reimer, P., Reisert, B., Reyna, D., Riess, S., Rizvi, E., Robmann, P., Roosen, R., Rostovtsev, A., Royon, C., Rusakov, S., Rybicki, K., Sankey, D.P.C., Scheins, J., Schilling, F.P., Schleif, S., Schleper, P., Schmidt, D., Schoeffel, L., Schorner, T., Schoning, A., Schroder, V., Schultz-Coulon, H.C., Sefkow, F., Shekelian, V., Shevyakov, I., Shtarkov, L.N., Siegmon, G., Sievers, P., Sirois, Y., Sloan, T., Smirnov, P., Smith, M., Solochenko, V., Solovev, Yu., Spaskov, V., Specka, A., Spitzer, H., Stamen, R., Steinhart, J., Stella, B., Stellberger, A., Stiewe, J., Straumann, U., Struczinski, W., Sutton, J.P., Swart, M., Tasevsky, M., Chernyshov, V., Chechelnitsky, S., Thompson, G., Thompson, P.D., Tobien, N., Traynor, D., Truol, P., Tsipolitis, G., Turnau, J., Turney, J.E., Tzamariudaki, E., Udluft, S., Usik, A., Valkar, S., Valkarova, A., Vallee, C., van Mechelen, P., Vazdik, Ya., Villet, G., von Dombrowski, S., Wacker, K., Wallny, R., Walter, T., Waugh, B., Weber, G., Weber, M., Wegener, D., Wegner, A., Wengler, T., Werner, M., West, L.R., White, G., Wiesand, S., Wilksen, T., Winde, M., Winter, G.G., Wissing, C., Wobisch, M., Wollatz, H., Wunsch, E., Zacek, J., Zalesak, J., Zhang, Zhiqing, Zhokin, A., Zini, P., Zomer, F., Zsembery, J., Zur Nedden, M., 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), 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 Kerec, Hélène
Subjects: [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], public sphere -European Commission, political communication
Abstract: As the high abstention rate during the last european election shows, it seems that a large part of the european population is rather sceptical towards the european integration process. One ascribe this "euroscepticism" to the European Union communication. Our paper aims to evaluate this hypothesis which is not as obvious as it seems first. To do so we have evaluated the communication policy which as been set up by the European Commission (before the Romano Prodi Presidence) to conclude that the lack of a real european public sphere is probably a better explanation of this phenomenon.
Published: 2000

45. Forward pi degrees-meson production at HERA

Author: Adloff, C, Andreev, V, Andrieu, B, Arkadov, V, Astvatsatourov, A, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Bassler, U, Bate, P, Beglarian, A, Behnke, O, Beier, C, Belousov, A, Benisch, T, Berger, C, Bernardi, G, Berndt, T, Bertrand-Coremans, G, Biddulph, P, Bizot, JC, Borras, K, Boudry, V, Braunschweig, W, Brisson, V, Broker, HB, Brown, DP, Bruckner, W, Bruel, P, Bruncko, D, Burger, J, Busser, FW, Bunyatyan, A, Burke, S, Burrage, A, Buschhorn, G, Campbell, AJ, Cao, J, Carli, T, Chabert, E, Charlet, M, Clarke, D, Clerbaux, B, Collard, C, Contreras, JG, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, David, M, Davidsson, M, Delcourt, B, Demirchyan, R, De Roeck, A, De Wolf, EA, Diaconu, C, Dixon, P, Dodonov, V, Donovan, KT, Dowell, JD, Droutskoi, A, Duprel, C, Ebert, J, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Elsen, E, Erdmann, M, Fahr, AB, Faulkner, PJW, Favart, L, Fedotov, A, Felst, R, Feltesse, J, Ferencei, J, Ferrarotto, F, Ferron, S, Fleischer, M, Flugge, G, Fomenko, A, Foresti, I, Formanek, J, Foster, JM, Franke, G, Gabathuler, E, Gabathuler, K, Garvey, J, Gassner, J, Gayler, J, Gerhards, R, Ghazaryan, S, Glazov, A, Goerlich, L, Gogitidze, N, Goldberg, M, Gorelov, I, Grab, C, Grassler, H, Greenshaw, T, Griffiths, RK, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Haustein, V, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, R, Herrera, G, Herynek, I, Hilgers, M, Hiller, KH, Hilton, CD, Hladky, J, Hoting, P, Hoffmann, D, Horisberger, P, Hurling, S, Ibbotson, M, Issever, C, Jacquet, M, Jaffre, M, Janauschek, L, Jansen, DM, Janssen, X, Jonsson, L, Johnson, DP, Jones, M, Jung, H, Kastli, HK, Kant, D, Kapichine, M, Karlsson, M, Karschnick, O, Kaufmann, O, Kausch, M, Keil, F, Keller, N, Kenyon, IR, Kermiche, S, Kiesling, C, Klein, M, Kleinwort, C, Knies, G, Kolanoski, H, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Krasny, MW, Krehbiel, H, Kroseberg, J, Krucker, D, Kruger, K, Kupper, A, Kuhr, T, Kurca, T, Lachnit, W, Lahmann, R, Lamb, D, Landon, MPJ, Lange, W, Lebedev, A, Lehner, F, Lemaitre, V, Lemrani, R, Lendermann, V, Levonian, S, Lindstroem, M, Lobo, G, Lobodzinska, E, Lubimov, V, Luders, S, Luke, D, Lytkin, L, Magnussen, N, Mahlke-Kruger, H, Malden, N, Malinovski, E, Malinovski, I, Maracek, R, Marage, P, Marks, J, Marshall, R, Martyn, HU, Martyniak, J, Maxfield, SJ, McMahon, TR, Mehta, A, Meier, K, Merkel, P, Metlica, F, Meyer, A, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Mohr, R, Mohrdieck, S, Mondragon, MN, Moreau, F, Morozov, A, Morris, JV, Muller, D, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, J, Naumann, T, Negri, I, Newman, PR, Nguyen, HK, Nicholls, TC, Niebergall, F, Niebuhr, C, Nix, O, Nowak, G, Nunnemann, T, Olsson, JE, Ozerov, D, Panassik, V, Pascaud, C, Passaggio, S, Patel, GD, Perez, E, Phillips, JP, Pitzl, D, Poschl, R, Potashnikova, I, Povh, B, Rabbertz, K, Radel, G, Rauschenberger, J, Reimer, P, Reisert, B, Reyna, D, Riess, S, Rizvi, E, Robmann, P, Roosen, R, Rostovtsev, A, Royon, C, Rusakov, S, Rybicki, K, Sankey, DPC, Scheins, J, Schilling, FP, Schleif, S, Schleper, P, Schmidt, D, Schoeffel, L, Schorner, T, Schroder, V, Schultz-Coulon, HC, Sefkow, F, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Siegmon, G, Sievers, P, Sirois, Y, Sloan, T, Smirnow, P, Smith, M, Solochenko, V, Soloviev, Y, Spaskov, V, Specka, A, Spitzer, H, Stamen, R, Steinhart, J, Stella, B, Stellberger, A, Stiewe, J, Straumann, U, Struczinski, W, Sutton, JP, Swart, M, Tasevsky, M, Tchernyshov, V, Tchetchelnitski, S, Thompson, G, Thompson, PD, Tobien, N, Traynor, D, Truol, P, Tsipolitis, G, Turnau, J, Turney, J, Tzamariudaki, E, Udluft, S, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Haecke, A, Van Mechelen, P, Vazdik, Y, Villet, G, von Dombrowski, S, Wacker, K, Wallny, R, Walter, T, Waugh, B, Weber, G, Weber, M, Wegener, D, Wegner, A, Wengler, T, Werner, M, West, LR, White, G, Wiesand, S, Wilksen, T, Winde, M, Winter, GG, Wissing, C, Wobisch, M, Wollatz, H, Wunsch, E, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zini, P, Zomer, F, Zsembery, J, zur Nedden, M, and Collaboration, H
Published: 1999

46. Charged Particle Cross Sections in Photoproduction and Extraction of the Gluon Density in the Photon

Author: Adloff, C, Anderson, M, Andreev, V, Andrieu, B, Arkadov, V, Arndt, C, Ayyaz, I, Babaev, A, Bahr, J, Ban, J, Baranov, P, Barrelet, E, Bartel, W, Bassler, U, Bate, P, Beck, M, Beglarian, A, Behnke, O, Behrend, HJ, Beier, C, Belousov, A, Berger, C, Bernardi, G, Bertrand-Coremans, G, Biddulph, P, Bizot, JC, Boudry, V, Braunschweig, W, Brisson, V, Brown, DP, Bruckner, W, Bruel, P, Bruncko, D, Burger, J, Busser, FW, Buniatian, A, Burke, S, Buschhorn, G, Calvet, D, Campbell, AJ, Carli, T, Chabert, E, Charlet, M, Clarke, D, Clerbaux, B, Cocks, S, Contreras, JG, Cormack, C, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, David, M, Davidsson, M, De Roeck, A, De Wolf, EA, Delcourt, B, Demirchyan, R, Diaconu, C, Dirkmann, M, Dixon, P, Dlugosz, W, Donovan, KT, Dowell, JD, Droutskoi, A, Ebert, J, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Elsen, E, Enzenberger, M, Erdmann, M, Fahr, AB, Favart, L, Fedotov, A, Felst, R, Feltesse, J, Ferencei, J, Ferrarotto, F, Fleischer, M, Flugge, G, Fomenko, A, Formanek, J, Foster, JM, Franke, G, Gabathuler, E, Gabathuler, K, Gaede, F, Garvey, J, Gayler, J, Gerhards, R, Ghazaryan, S, Glazov, A, Goerlich, L, Gogitidze, N, Goldberg, M, Gorelov, I, Grab, C, Grassler, H, Greenshaw, T, Griffiths, RK, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Haller, T, Hampel, M, Haustein, V, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, R, Herynek, I, Hewitt, K, Hiller, KH, Hilton, CD, Hladky, J, Hoffmann, D, Holtom, T, Hoprich, W, Horisberger, R, Hudgson, VL, Hurling, S, Ibbotson, M, Issever, C, Itterbeck, H, Jacquet, M, Jaffre, M, Jansen, DM, Jonsson, L, Johnson, DP, Jung, H, Kastli, HK, Kander, M, Kant, D, Kapichine, M, Karlsson, M, Karschnik, O, Katzy, J, Kaufmann, O, Kausch, M, Kenyon, IR, Kermiche, S, Keuker, C, Kiesling, C, Klein, M, Kleinwort, C, Knies, G, Kohne, JH, Kolanoski, H, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Kramerkamper, T, Krasny, MW, Krehbiel, H, Krucker, D, Kruger, K, Kupper, A, Kuster, H, Kuhlen, M, Kurca, T, Laforge, B, Lahmann, R, Landon, MPJ, Lange, W, Langenegger, U, Lebedev, A, Lehner, F, Lemaitre, V, Lendermann, V, Levonian, S, Lindstroem, M, List, B, Lobo, G, Lobodzinska, E, Lubimov, V, Luke, D, Lytkin, L, Magnussen, N, Mahlke-Kruger, H, Malinovski, E, Maracek, R, Marage, P, Marks, J, Marshall, R, Martin, G, Martyn, HU, Martyniak, J, Maxfield, SJ, McMahon, SJ, McMahon, TR, Mehta, A, Meier, K, Merkel, P, Metlica, F, Meyer, A, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Moeck, J, Mohr, R, Mohrdieck, S, Moreau, F, Morris, JV, Muller, D, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, T, Negri, I, Newman, PR, Nguyen, HK, Nicholls, TC, Niebergall, F, Niebuhr, C, Niedzballa, C, Niggli, H, Nikitin, D, Nix, O, Nowak, G, Nunnemann, T, Oberlack, H, Olsson, JE, Ozerov, D, Palmen, P, Panassik, V, Pascaud, C, Passaggio, S, Patel, GD, Pawletta, H, Perez, E, Phillips, JP, Pieuchot, A, Pitzl, D, Poschl, R, Pope, G, Povh, B, Rabbertz, K, Rauschenberger, J, Reimer, P, Reisert, B, Rick, H, Riess, S, Rizvi, E, Robmann, P, Roosen, R, Rosenbauer, K, Rostovtsev, A, Rouse, F, Royon, C, Rusakov, S, Rybicki, K, Sankey, DPC, Schacht, P, Scheins, J, Schleif, S, Schleper, P, Schmidt, D, Schoeffel, L, Schroder, V, Schultz-Coulon, HC, Schwab, B, Sefkow, F, Semenov, A, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Siegmon, G, Sirois, Y, Sloan, T, Smirnov, P, Smith, M, Solochenko, V, Soloviev, Y, Spaskov, V, Specka, A, Spiekermann, J, Spitzer, H, Squinabol, F, Steffen, P, Steinberg, R, Steinhart, J, Stella, B, Stellberger, A, Stiewe, J, Straumann, U, Struczinski, W, Sutton, JP, Swart, M, Tapprogge, S, Tasevsky, M, Tchernyshov, V, Tchetchelnitski, S, Theissen, J, Thompson, G, Thompson, PD, Tobien, N, Todenhagen, R, Truol, P, Tsipolitis, G, Turnau, J, Tzamariudaki, E, Udluft, S, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Esch, P, Van Haecke, A, Van Mechelen, P, Vazdik, Y, Villet, G, Wacker, K, Wallny, R, Walter, T, Waugh, B, Weber, G, Weber, M, Wegener, D, Wegner, A, Wengler, T, Werner, M, West, LR, Wiesand, S, Wilksen, T, Willard, S, Winde, M, Winter, GG, Wittek, C, Wittmann, E, Wobisch, M, Wollatz, H, Wunsch, E, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zini, P, Zomer, F, Zsembery, J, zur Nedden, M, Collaboration, H, 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: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment
Abstract: Photoproduction data collected with the H1 detector at HERA in 1994 are used to study the cross-sections for inclusive charged particle production and the structure of the photon. The differential cross-sections dσ/dp2T, for |η| < 1 in the HERA laboratory frame, and dσ/dη for PT > 2GeV/c and PT > 3 GeV/c have been measured. Model calculations of these cross-sections, based on perturbative QCD, indicate that the results are sensitive to the parton densities of the photon as well as to higher order effects, which are phenomenologically treated by multiple interactions. This sensitivity is exploited to determine the leading order cursive Greek chiγ distribution of partons in the photon using a new method based on high PT charged particles. The gluon content of the photon is extracted and found to rise with decreasing cursive Greek chiγ.
Published: 1999

47. Forward $\pi^0$ meson production at Hera

Author: Adloff, C., Andreev, V., Andrieu, B., Arkadov, V., Astvatsatourov, A., Ayyaz, I., Babaev, A., Bahr, J., Baranov, P., Barrelet, E., Bartel, W., Bassler, U., Bate, P., Beglarian, A., Behnke, O., Beier, C., Belousov, A., Benisch, T., Berger, C., Bernardi, G., Berndt, T., Bertrand-Coremans, G., Biddulph, P., Bizot, J.C., Borras, K., Boudry, V., Braunschweig, W., Brisson, V., Broker, H.B., Brown, D.P., Bruckner, W., Bruel, Pascal, Bruncko, D., Burger, J., Busser, F.W., Bunyatian, A., Burke, S., Burrage, A., Buschhorn, G., Campbell, A.J., Cao, J., Carli, T., Chabert, E., Charlet, M., Clarke, D., Clerbaux, B., Collard, C., Contreras, J.G., Coughlan, J.A., Cousinou, M.C., Cox, B.E., Cozzika, G., Cvach, J., Dainton, J.B., Dau, W.D., Daum, K., David, M., Davidsson, M., Delcourt, B., Demirchian, R., De Roeck, A., De Wolf, E.A., Diaconu, C., Dixon, P., Dodonov, V., Donovan, K.T., Dowell, J.D., Droutskoi, A., Duprel, C., Ebert, J., Eckerlin, G., Eckstein, D., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Elsen, E., Erdmann, M., Fahr, A.B., Faulkner, P.J.W., Favart, L., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Ferrarotto, F., Ferron, S., Fleischer, M., Flugge, G., Fomenko, A., Foresti, I., Formanek, J., Foster, J.M., Franke, G., Gabathuler, E., Gabathuler, K., Garvey, J., Gassner, J., Gayler, J., Gerhards, R., Ghazaryan, S., Glazov, A., Goerlich, L., Gogitidze, N., Goldberg, M., Gorelov, I., Grab, C., Grassler, H., Greenshaw, T., Griffiths, R.K., Grindhammer, G., Hadig, T., Haidt, D., Hajduk, L., Haustein, V., Haynes, W.J., Heinemann, B., Heinzelmann, G., Henderson, R.C.W., Hengstmann, S., Henschel, H., Heremans, R., Herrera, G., Herynek, I., Hilgers, M., Hiller, K.H., Hilton, C.D., Hladky, J., Hoting, P., Hoffmann, D., Horisberger, R., Hurling, S., Ibbotson, M., Issever, C., Jacquet, M., Jaffre, M., Janauschek, L., Jansen, D.M., Janssen, X., Jonsson, L., Johnson, D.P., Jones, M., Jung, H., Kastli, H.K., Kant, D., Kapichine, M., Karlsson, M., Karschnick, O., Kaufmann, O., Kausch, M., Keil, F., Keller, N., Kenyon, I.R., Kermiche, S., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Kolanoski, H., Kolya, S.D., Korbel, V., Kostka, P., Kotelnikov, S.K., Krasny, M.W., Krehbiel, H., Kroseberg, J., Krucker, D., Kruger, K., Kupper, A., Kuhr, T., Kurca, T., Lachnit, W., Lahmann, R., Lamb, D., Landon, M.P.J., Lange, W., Lebedev, A., Lehner, F., Lemaitre, V., Lemrani, R., Lendermann, V., Levonian, S., Lindstroem, M., Lobo, G., Lobodzinska, E., Lubimov, V., Luders, S., Luke, D., Lytkin, L., Magnussen, N., Mahlke-Kruger, H., Malden, N., Malinovsky, E., Malinovsky, I., Maracek, R., Marage, P., Marks, J., Marshall, R., Martyn, H.U., Martyniak, J., Maxfield, S.J., McMahon, T.R., Mehta, A., Meier, K., Merkel, P., Metlica, F., Meyer, A., Meyer, H., Meyer, J., Meyer, P.O., Mikocki, S., Milstead, D., Mohr, R., Mohrdieck, S., Mondragon, M.N., Moreau, F., Morozov, A., Morris, J.V., Muller, D., Muller, K., Murin, P., Nagovizin, V., Naroska, B., Naumann, J., Naumann, T., Negri, I., Newman, P.R., Nguyen, H.K., Nicholls, T.C., Niebergall, F., Niebuhr, C., Nix, O., Nowak, G., Nunnemann, T., Olsson, J.E., Ozerov, D., Panassik, V., Pascaud, C., Passaggio, S., Patel, G.D., Perez, Emile, Phillips, J.P., Pitzl, D., Poschl, R., Potashnikova, I., Povh, B., Rabbertz, K., Radel, G., Rauschenberger, J., Reimer, P., Reisert, B., Reyna, D., Riess, S., Rizvi, E., Robmann, P., Roosen, R., Rostovtsev, A., Royon, C., Rusakov, S., Rybicki, K., Sankey, D.P.C., Scheins, J., Schilling, F.P., Schleif, S., Schleper, P., Schmidt, D., Schoeffel, L., Schorner, T., Schroder, V., Schultz-Coulon, H.C., Sefkow, F., Shekelian, V., Sheviakov, I., Shtarkov, L.N., Siegmon, G., Sievers, P., Sirois, Y., Sloan, T., Smirnov, P., Smith, M., Solochenko, V., Solovev, Yu., Spaskov, V., Specka, A., Spitzer, H., Stamen, R., Steinhart, J., Stella, B., Stellberger, A., Stiewe, J., Straumann, U., Struczinski, W., Sutton, J.P., Swart, M., Tasevsky, M., Chernyshov, V., Chechelnitsky, S., Thompson, G., Thompson, P.D., Tobien, N., Traynor, D., Truol, P., Tsipolitis, G., Turnau, J., Turney, J., Tzamariudaki, E., Udluft, S., Usik, A., Valkar, S., Valkarova, A., Vallee, C., Van Haecke, A., Van Mechelen, P., Vazdik, Ya., Villet, G., Von Dombrowski, S., Wacker, K., Wallny, R., Walter, T., Waugh, B., Weber, G., Weber, M., Wegener, D., Wegner, A., Wengler, T., Werner, M., West, L.R., White, G., Wiesand, S., Wilksen, T., Winde, M., Winter, G.G., Wissing, C., Wobisch, M., Wollatz, H., Wunsch, E., Zacek, J., Zalesak, J., Zhang, Zhiqing, Zhokin, A., Zini, P., Zomer, F., Zsembery, J., Zur Nedden, M., Damoiseaux, Magali, 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), 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), 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: [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Phenomenology, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Nuclear Experiment
Abstract: High transverse momentum pi0-mesons have been measured with the H1 detector at HERA in deep-inelastic ep scattering events at low Bjorken-x, down to x
Published: 1999

48. Measurement of d$^\star$ meson cross-sections at Hera and determination of the gluon density in the proton using NLO QCD

Author: Adloff, C., Anderson, M., Andreev, V., Andrieu, B., Arkadov, V., Arndt, C., Ayyaz, I., Babaev, A., Bahr, J., Baranov, P., Barrelet, E., Bartel, W., Bassler, U., Bate, P., Beck, M., Beglarian, A., Behnke, O., Behrend, H.J., Beier, C., Belousov, A., Berger, C., Bernardi, G., Bertrand-Coremans, G., Biddulph, P., Bizot, J.C., Boudry, V., Braunschweig, W., Brisson, V., Brown, D.P., Bruckner, W., Bruel, Pascal, Bruncko, D., Burger, J., Busser, F.W., Buniatian, A., Burke, S., Burrage, A., Buschhorn, G., Calvet, D., Campbell, A.J., Carli, T., Chabert, E., Charlet, M., Clarke, D., Clerbaux, B., Contreras, J.G., Cormack, C., Coughlan, J.A., Cousinou, M.C., Cox, B.E., Cozzika, G., Cvach, J., Dainton, J.B., Dau, W.D., Daum, K., David, M., Davidsson, M., De Roeck, A., De Wolf, E.A., Delcourt, B., Demirchyan, R., Diaconu, C., Dirkmann, M., Dixon, P., Dlugosz, W., Donovan, K.T., Dowell, J.D., Droutskoi, A., Ebert, J., Eckerlin, G., Eckstein, D., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Elsen, E., Enzenberger, M., Erdmann, M., Fahr, A.B., Favart, L., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Ferrarotto, F., Fleischer, M., Flugge, G., Fomenko, A., Formanek, J., Foster, J.M., Franke, G., Gabathuler, E., Gabathuler, K., Gaede, F., Garvey, J., Gassner, J., Gayler, J., Gerhards, R., Ghazaryan, S., Glazov, A., Goerlich, L., Gogitidze, N., Goldberg, M., Gorelov, I., Grab, C., Grassler, H., Greenshaw, T., Griffiths, R.K., Grindhammer, G., Hadig, T., Haidt, D., Hajduk, L., Haller, T., Hampel, M., Haustein, V., Haynes, W.J., Heinemann, B., Heinzelmann, G., Henderson, R.C.W., Hengstmann, S., Henschel, H., Heremans, R., Herynek, I., Hewitt, K., Hiller, K.H., Hilton, C.D., Hladky, J., Hoffmann, D., Horisberger, R., Hurling, S., Ibbotson, M., Issever, C., Jacquet, M., Jaffre, M., Jansen, D.M., Jonsson, L., Johnson, D.P., Jones, M., Jung, H., Kastli, H.K., Kander, M., Kant, D., Kapichine, M., Karlsson, M., Karschnik, O., Katzy, J., Kaufmann, O., Kausch, M., Kenyon, I.R., Kermiche, S., Keuker, C., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Kohne, J.H., Kolanoski, H., Kolya, S.D., Korbel, V., Kostka, P., Kotelnikov, S.K., Kramerkamper, T., Krasny, M.W., Krehbiel, H., Krucker, D., Kruger, K., Kupper, A., Kuster, H., Kuhlen, M., Kurca, T., Lahmann, R., Landon, M.P.J., Lange, W., Langenegger, U., Lebedev, A., Lehner, F., Lemaitre, V., Lendermann, V., Levonian, S., Lindstroem, M., List, B., Lobo, G., Lobodzinska, E., Lubimov, V., Luders, S., Luke, D., Lytkin, L., Magnussen, N., Mahlke-Kruger, H., Malinovsky, E., Maracek, R., Marage, P., Marks, J., Marshall, R., Martin, G., Martyn, H.U., Martyniak, J., Maxfield, S.J., McMahon, T.R., Mehta, A., Meier, K., Merkel, P., Metlica, F., Meyer, A., Meyer, H., Meyer, J., Meyer, P.O., Mikocki, S., Milstead, D., Moeck, J., Mohr, R., Mohrdieck, S., Moreau, F., Morris, J.V., Muller, D., Muller, K., Murin, P., Nagovizin, V., Naroska, B., Naumann, T., Negri, I., Newman, P.R., Nguyen, H.K., Nicholls, T.C., Niebergall, F., Niebuhr, C., Niedzballa, C., Niggli, H., Nikitin, D., Nix, O., Nowak, G., Nunnemann, T., Oberlack, H., Olsson, J.E., Ozerov, D., Palmen, P., Panassik, V., Pascaud, C., Passaggio, S., Patel, G.D., Pawletta, H., Perez, Emile, Phillips, J.P., Pieuchot, A., Pitzl, D., Poschl, R., Pope, G., Povh, B., Rabbertz, K., Rauschenberger, J., Reimer, P., Reisert, B., Reyna, D., Rick, H., Riess, S., Rizvi, E., Robmann, P., Roosen, R., Rosenbauer, K., Rostovtsev, A., Rouse, F., Royon, C., Rusakov, S., Rybicki, K., Sankey, D.P.C., Schacht, P., Scheins, J., Schilling, F.P., Schleif, S., Schleper, P., Schmidt, D., Schoeffel, L., Schroder, V., Schultz-Coulon, H.C., Schwab, B., Sefkow, F., Semenov, A., Shekelian, V., Sheviakov, I., Shtarkov, L.N., Siegmon, G., Sirois, Y., Sloan, T., Smirnov, P., Smith, M., Solochenko, V., Solovev, Yu., Spaskov, V., Specka, A., Spiekermann, J., Spitzer, H., Squinabol, F., Steffen, P., Steinberg, R., Steinhart, J., Stella, B., Stellberger, A., Stiewe, J., Straumann, U., Struczinski, W., Sutton, J.P., Swart, M., Tapprogge, S., Tasevsky, M., Chernyshov, V., Chechelnitsky, S., Theissen, J., Thompson, G., Thompson, P.D., Tobien, N., Todenhagen, R., Truol, P., Tsipolitis, G., Turnau, J., Tzamariudaki, E., Udluft, S., Usik, A., Valkar, S., Valkarova, A., Vallee, C., Van Esch, P., Van Haecke, A., Van Mechelen, P., Vazdik, Ya., Villet, G., Wacker, K., Wallny, R., Walter, T., Waugh, B., Weber, G., Weber, M., Wegener, D., Wegner, A., Wengler, T., Werner, M., West, L.R., Wiesand, S., Wilksen, T., Willard, S., Winde, M., Winter, G.G., Wittek, C., Wittmann, E., Wobisch, M., Wollatz, H., Wunsch, E., Zacek, J., Zalesak, J., Zhang, Zhiqing, Zhokin, A., Zini, P., Zomer, F., Zsembery, J., Zur Nedden, M., 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), 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 Damoiseaux, Magali
Subjects: [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Theory, High Energy Physics::Phenomenology, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Nuclear Experiment
Abstract: With the H1 detector at the ep collider HERA, D* meson production cross sections have been measured in deep inelastic scattering with four-momentum transfers Q^2>2 GeV2 and in photoproduction at energies around W(gamma p)~ 88 GeV and 194 GeV. Next-to-Leading Order QCD calculations are found to describe the differential cross sections within theoretical and experimental uncertainties. Using these calculations, the NLO gluon momentum distribution in the proton, x_g g(x_g), has been extracted in the momentum fraction range 7.5x10^{-4}< x_g
Published: 1999

49. Measurement of leading proton and neutron production in deep inelastic scattering at HERA

Author: Adloff, C., Anderson, M., Andreev, V., Andrieu, B., Arkadov, V., Arndt, C., Ayyaz, I., Babaev, A., Bahr, J., Baranov, P., Barrelet, E., Bartel, W., Bassler, U., Bate, P., Beck, M., Beglarian, A., Behnke, O., Behrend, H.J., Beier, C., Belousov, A., Berger, C., Bernardi, G., Berndt, T., Bertrand-Coremans, G., Biddulph, P., Bizot, J.C., Boudry, V., Braunschweig, W., Brisson, V., Brown, D.P., Bruckner, W., Bruel, Pascal, Bruncko, D., Burger, J., Busser, F.W., Buniatian, A., Burke, S., Buschhorn, G., Calvet, D., Campbell, A.J., Carli, T., Chabert, E., Charlet, M., Clarke, D., Clerbaux, B., Cocks, S., Contreras, J.G., Cormack, C., Coughlan, J.A., Cousinou, M.C., Cox, B.E., Cozzika, G., Cvach, J., Dainton, J.B., Dau, W.D., Daum, K., David, M., Davidsson, M., de Roeck, A., de Wolf, E.A., Delcourt, B., Demirchian, R., Diaconu, C., Dirkmann, M., Dixon, P., Dlugosz, W., Donovan, K.T., Dowell, J.D., Droutskoi, A., Ebert, J., Eckerlin, G., Eckstein, D., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Elsen, E., Enzenberger, M., Erdmann, M., Fahr, A.B., Favart, L., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Ferrarotto, F., Fleischer, M., Flugge, G., Fomenko, A., Formanek, J., Foster, J.M., Franke, G., Gabathuler, E., Gabathuler, K., Gaede, F., Garvey, J., Gassner, J., Gayler, J., Gerhards, R., Ghazarian, S., Glazov, A., Goerlich, L., Gogitidze, N., Goldberg, M., Gorelov, I., Grab, C., Grassler, H., Greenshaw, T., Griffiths, R.K., Grindhammer, G., Hadig, T., Haidt, D., Hajduk, L., Haller, T., Hampel, M., Haustein, V., Haynes, W.J., Heinemann, B., Heinzelmann, G., Henderson, R.C.W., Hengstmann, S., Henschel, H., Heremans, R., Herynek, I., Hewitt, K., Hiller, K.H., Hilton, C.D., Hladky, J., Hoffmann, D., Holtom, T., Horisberger, R., Hurling, S., Ibbotson, M., Issever, C., Jacquet, M., Jaffre, M., Jansen, D.M., Jonsson, L., Johnson, D.P., Jung, H., Kastli, H.K., Kander, M., Kant, D., Kapichine, M., Karlsson, M., Karschnik, O., Katzy, J., Kaufmann, O., Kausch, M., Kenyon, I.R., Kermiche, S., Keuker, C., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Kohne, J.H., Kolanoski, H., Kolya, S.D., Korbel, V., Kostka, P., Kotelnikov, S.K., Kramerkamper, T., Krasny, M.W., Krehbiel, H., Krucker, D., Kruger, K., Kupper, A., Kuster, H., Kuhlen, M., Kurca, T., Lahmann, R., Landon, M.P.J., Lange, W., Langenegger, U., Lebedev, A., Lehner, F., Lemaitre, V., Lendermann, V., Levonian, S., Lindstroem, M., List, B., Lobo, G., Lobodzinska, E., Lubimov, V., Luders, S., Luke, D., Lytkin, L., Magnussen, N., Mahlke-Kruger, H., Malinovskii, E., Maracek, R., Marage, P., Marks, J., Marshall, R., Martin, G., Martyn, H.U., Martyniak, J., Maxfield, S.J., Mcmahon, S.J., Mcmahon, T.R., Mehta, A., Meier, K., Merkel, P., Metlica, F., Meyer, A., Meyer, H., Meyer, J., Meyer, P.O., Mikocki, S., Milstead, D., Moeck, J., Mohr, R., Mohrdieck, S., Moreau, F., Morris, J.V., Muller, D., Muller, K., Murin, P., Nagovizin, V., Naroska, B., Naumann, T., Negri, I., Newman, P.R., Nguyen, H.K., Nicholls, T.C., Niebergall, F., Niebuhr, C., Niedzballa, C., Niggli, H., Nikitin, D., Nix, O., Nowak, G., Nunnemann, T., Oberlack, H., Olsson, J.E., Ozerov, D., Palmen, P., Panassik, V., Pascaud, C., Passaggio, S., Patel, G.D., Pawletta, H., Perez, Emile, Phillips, J.P., Pieuchot, A., Pitzl, D., Poschl, R., Pope, G., Povh, B., Rabbertz, K., Rauschenberger, J., Reimer, P., Reisert, B., Rick, H., Riess, S., Rizvi, E., Robmann, P., Roosen, R., Rosenbauer, K., Rostovtsev, A., Rouse, F., Royon, C., Rusakov, S., Rybicki, K., Sankey, D.P.C., Schacht, P., Scheins, J., Schilling, F.P., Schleif, S., Schleper, P., Schmidt, D., Schoeffel, L., Schroder, V., Schultz-Coulon, H.C., Schwab, B., Sefkow, F., Semenov, A., Shekelian, V., Shevyakov, I., Shtarkov, L.N., Siegmon, G., Sirois, Y., Sloan, T., Smirnov, P., Smith, M., Solochenko, V., Solovev, Yu., Spaskov, V., Specka, A., Spiekermann, J., Spitzer, H., Squinabol, F., Steffen, P., Steinberg, R., Steinhart, J., Stella, B., Stellberger, A., Stiewe, J., Straumann, U., Struczinski, W., Sutton, J.P., Swart, M., Tapprogge, S., Tasevsky, M., Chernyshov, V., Chechelnitskii, S., Theissen, J., Thompson, G., Thompson, P.D., Tobien, N., Todenhagen, R., Truol, P., Tsipolitis, G., Turnau, J., Tzamariudaki, E., Udluft, S., Usik, A., Valkar, S., Valkarova, A., Vallee, C., Esch, P.Van., Haecke, A.Van., Mechelen, P.Van., Vazdik, Ya., Villet, G., Wacker, K., Wallny, R., Walter, T., Waugh, B., Weber, G., Weber, M., Wegener, D., Wegner, A., Wengler, T., Werner, M., West, L.R., Wiesand, S., Wilksen, T., Willard, S., Winde, M., Winter, G.G., Wittek, C., Wittmann, E., Wobisch, M., Wollatz, H., Wunsch, E., Zacek, J., Zalesak, J., Zhang, Zhiqing, Zhokin, A., Zini, P., Zomer, F., Zsembery, J., Nedden, M.Zur., 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), 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 Kerec, Hélène
Subjects: Particle physics, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics and Astronomy (miscellaneous), Proton, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, FOS: Physical sciences, 01 natural sciences, High Energy Physics - Experiment, Pomeron, High Energy Physics - Experiment (hep-ex), Pion, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Neutron, 010306 general physics, Nuclear Experiment, Engineering (miscellaneous), Physics, 010308 nuclear & particles physics, Scattering, High Energy Physics::Phenomenology, HERA, Deep inelastic scattering, Baryon, High Energy Physics::Experiment
Abstract: Deep--inelastic scattering events with a leading baryon have been detected by the H1 experiment at HERA using a forward proton spectrometer and a forward neutron calorimeter. Semi--inclusive cross sections have been measured in the kinematic region 2 = 160 GeV. The measurements are used to test production models and factorization hypotheses. A Regge model of leading baryon production which consists of pion, pomeron and secondary reggeon exchanges gives an acceptable description of both semi-inclusive cross sections in the region 0.7, 30 pages, 9 figures, 2 tables, submitted to Eur. Phys. J
Published: 1999

50. A Search for Leptoquark Bosons and Lepton Flavor Violation in $e^{+} p$ Collisions at HERA

Author: Adloff, C, Andreev, V, Andrieu, B, Arkadov, V, Astvatsatourov, A, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Bassler, U, Bate, P, Beglarian, A, Behnke, O, Behrend, HJ, Beier, C, Belousov, A, Berger, C, Bernardi, G, Berndt, T, Bertrand-Coremans, G, Biddulph, P, Bizot, JC, Boudry, V, Braunschweig, W, Brisson, V, Broker, HB, Brown, DP, Bruckner, W, Bruel, P, Bruncko, D, Burger, J, Busser, FW, Bunyatyan, A, Burke, S, Burrage, A, Buschhorn, G, Calvet, D, Campbell, AJ, Carli, T, Chabert, E, Charlet, M, Clarke, D, Clerbaux, B, Contreras, JG, Cormack, C, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, David, M, Davidsson, M, De Roeck, A, De Wolf, EA, Delcourt, B, Demirchyan, R, Diaconu, C, Dirkmann, M, Dixon, P, Dodonov, V, Donovan, KT, Dowell, JD, Droutskoi, A, Ebert, J, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Elsen, E, Enzenberger, M, Erdmann, M, Fahr, AB, Faulkner, PJW, Favart, L, Fedotov, A, Felst, R, Feltesse, J, Ferencei, J, Ferrarotto, F, Ferron, S, Fleischer, M, Flugge, G, Fomenko, A, Formanek, J, Foster, JM, Franke, G, Gabathuler, E, Gabathuler, K, Gaede, F, Garvey, J, Gassner, J, Gayler, J, Gerhards, R, Ghazaryan, S, Glazov, A, Goerlich, L, Gogitidze, N, Goldberg, M, Gorelov, I, Grab, C, Grassler, H, Greenshaw, T, Griffiths, RK, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Hampel, M, Haustein, V, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, R, Herrera, G, Herynek, I, Hewitt, K, Hilgers, M, Hiller, KH, Hilton, CD, Hladky, J, Hoting, P, Hoffmann, D, Horisberger, R, Hurling, S, Ibbotson, M, Issever, C, Jacquet, M, Jaffre, M, Janauschek, L, Jansen, DM, Jonsson, L, Johnson, DP, Jones, M, Jung, H, Kastli, HK, Kander, M, Kant, D, Kapichine, M, Karlsson, M, Karschnick, O, Kaufmann, O, Kausch, M, Keil, F, Keller, N, Kenyon, IR, Kermiche, S, Kiesling, C, Klein, M, Kleinwort, C, Knies, G, Kohne, JH, Kolanoski, H, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Kramerkamper, T, Krasny, MW, Krehbiel, H, Krucker, D, Kruger, K, Kupper, A, Kuster, H, Kuhlen, M, Kurca, T, Lachnit, W, Lahmann, R, Lamb, D, Landon, MPJ, Lange, W, Langenegger, U, Lebedev, A, Lehner, F, Lemaitre, V, Lemrani, R, Lendermann, V, Levonian, S, Lindstroem, M, Lobo, G, Lobodzinska, E, Lubimov, V, Luders, S, Luke, D, Lytkin, L, Magnussen, N, Mahlke-Kruger, H, Malden, N, Malinovski, E, Malinovski, I, Maracek, R, Marage, P, Marks, J, Marshall, R, Martyn, HU, Martyniak, J, Maxfield, SJ, McMahon, TR, Mehta, A, Meier, K, Merkel, P, Metlica, F, Meyer, A, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Mohr, R, Mohrdieck, S, Mondragon, MN, Moreau, F, Morozov, A, Morris, JV, Muller, D, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, J, Naumann, T, Negri, I, Newman, PR, Nguyen, HK, Nicholls, TC, Niebergall, F, Niebuhr, C, Niedzballa, C, Niggli, H, Nix, O, Nowak, G, Nunnemann, T, Oberlack, H, Olsson, JE, Ozerov, D, Palmen, P, Panassik, V, Pascaud, C, Passaggio, S, Patel, GD, Pawletta, H, Perez, E, Phillips, JP, Pieuchot, A, Pitzl, D, Poschl, R, Potashnikova, I, Povh, B, Rabbertz, K, Radel, G, Rauschenberger, J, Reimer, P, Reisert, B, Reyna, D, Riess, S, Rizvi, E, Robmann, P, Roosen, R, Rosenbauer, K, Rostovtsev, A, Royon, C, Rusakov, S, Rybicki, K, Sankey, DPC, Schacht, P, Scheins, J, Schilling, FP, Schleif, S, Schleper, P, Schmidt, D, Schoeffel, L, Schorner, T, Schroder, V, Schultz-Coulon, HC, Sefkow, F, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Siegmon, G, Sirois, Y, Sloan, T, Smirnov, P, Smith, M, Solochenko, V, Soloviev, Y, Spaskov, V, Specka, A, Spitzer, H, Squinabol, F, Stamen, R, Steinhart, J, Stella, B, Stellberger, A, Stiewe, J, Straumann, U, Struczinski, W, Sutton, JP, Swart, M, Tapprogge, S, Tasevsky, M, Tchernyshov, V, Tchetchelnitski, S, Thompson, G, Thompson, PD, Tobien, N, Todenhagen, R, Traynor, D, Truol, P, Tsipolitis, G, Turnau, J, Tzamariudaki, E, Udluft, S, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Haecke, A, Van Mechelen, P, Vazdik, Y, Villet, G, Wacker, K, Wallny, R, Walter, T, Waugh, B, Weber, G, Weber, M, Wegener, D, Wegner, A, Wengler, T, Werner, M, West, LR, White, G, Wiesand, S, Wilksen, T, Winde, M, Winter, GG, Wissing, C, Wittek, C, Wobisch, M, Wollatz, H, Wunsch, E, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zini, P, Zomer, F, Zsembery, J, zur Nedden, M, Collaboration, H, 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, Damoiseaux, Magali, 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: [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Phenomenology, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment
Abstract: A search for new bosons possessing couplings to lepton-quark pairs is performed in the H1 experiment at HERA using 1994 to 1997 data corresponding to an integrated luminosity of 37pb^-1. First generation leptoquarks (LQs) are searched in very high Q^2 neutral (NC) and charged (CC) current data samples. The measurements are compared to Standard Model (SM) expectations from deep-inelastic scattering (DIS). A deviation in the Q^2 spectrum previously observed in the 1994 to 1996 dataset at Q^2 \gsim 15000GeV^2 remains, though with less significance. This deviation corresponded to a clustering in the invariant mass spectrum at M \simeq 200 GeV which is not observed with the 1997 dataset alone. The NC DIS data is used to constrain the Yukawa couplings lambda of first generation scalar and vector LQs in the Buchmueller-Rueckl-Wyler effective model. Scalar LQs are excluded for masses up to 275GeV for a coupling of electromagnetic strength, lambda=0.3. A sensitivity to coupling values \lsim 1 is established for masses up to 400GeV for any LQ type. The NC and CC DIS data are combined to constrain lambda for arbitrary branching ratios of the LQ into eq in a generic model. For a decay branching ratio into e^+ u pairs as small as 10%, LQ masses up to 260 GeV are ruled out for lambda=0.3. LQs possessing couplings to mixed fermion generations, which could lead to signals of lepton flavor violation (LFV), are searched in events with a high transverse momentum mu or tau. No mu+X or tau+X event candidate is found that is compatible with LQ kinematics. Constraints are set on the Yukawa coupling involving the mu and tau lepton in a yet unexplored mass range.
Published: 1999

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