Diffractive dijet production at HERA

Authors
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, HJ Beier, C Belousov, A Berger, C Bernardi, G Bertrand-Coremans, G Biddulph, P Bizot, JC Boudry, V Braemer, A 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 Gebauer, M Gerhards, R Ghazaryan, S Glazov, A Goerlich, L Gogitidze, N Goldberg, M Gorelov, I Grab, C Grassler, H Greenshaw, T Griffiths, RK Grindhammer, G Gruber, C 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 Horisberger, R Hudgson, VL Hurling, S Ibbotson, M Issever, C Itterbeck, H Jacquet, M Jaffre, M Jansen, DM Jonsson, L Johnson, DP Jung, H Kaestli, HC Kander, M Kant, D Karlsson, M Kathage, U 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 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 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 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 Mroczko, E Muller, D Muller, K Murin, P Nagovizin, V Naroska, B Naumann, T Negri, I Newman, PR Newton, D 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 Panaro, E 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 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 Schiek, S Schleif, S Schleper, P Schmidt, D Schmidt, G 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 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 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 zurNedden, M
Citation
C. Adloff et al., Diffractive dijet production at HERA, EUR PHY J C, 6(3), 1999, pp. 421-436
Citations number
77
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
EUROPEAN PHYSICAL JOURNAL C
ISSN journal
1434-6044 → ACNP
Volume
6
Issue
3
Year of publication
1999
Pages
421 - 436
Database
ISI
SICI code
1434-6044(199901)6:3<421:DDPAH>2.0.ZU;2-V
Abstract
Interactions of the type ep --> eXY are studied, where the component X of t he 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 vir tualities in the range 7.5 < Q(2) < 80 GeV2. Cross sections are presented w here Y has mass M-y < 1.6 GeV, the squared four-momentum transferred at the proton vertex satisfies \t\ < 1 GcV(2) and the two jets each have transver se momentum p(T)(jet) > 5 GeV relative to the photon direction in the rest frame of X. Models based on a factorisable diffractive exchange with a gluo n dominated structure, evolved to a scale set by the transverse momentum (p ) over cap(T) of the outgoing partons front the hard interaction. give good descriptions of the data. Exclusive q (q) over bar production, as calculat ed in perturbative QCD using the squared proton gluon density, represents a t most a small fraction of the measured cross section. The compatibility of the data with a breaking of diffractive factorisation due to spectator int eractions in resolved photoproduction is investigated.