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          Institute: MPI für Kernphysik     Collection: Heavy Flavour Physics     Display Documents



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ID: 31352.0, MPI für Kernphysik / Heavy Flavour Physics
Energy flow and rapidity gaps between jets in photoproduction at HERA
Authors:Adloff, C.; Andreev, V.; Andrieu, B.; Anthonis, T.; Arkadov, V.; Astvatsatourov, A.; Babaev, A.; Bahr, J.; Baranov, P.; Barrelet, E.; Bartel, W.; Bate, P.; Becker, J.; Beglarian, A.; Behnke, O.; Beier, C.; Belousov, A.; Benisch, T.; Berger, C.; Berndt, T.; Bizot, J. C.; Boehme, J.; Boudry, V.; Braunschweig, W.; Brisson, V.; Broker, H. B.; Brown, D. P.; Bruckner, W.; Bruncko, D.; Burger, J.; Busser, F. W.; Bunyatyan, A.; Burrage, A.; Buschhorn, G.; Bystritskaya, L.; Campbell, A. J.; Cao, J.; Caron, S.; Cassol-Brunner, F.; Clarke, D.; 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.; Dingfelder, J.; Dixon, P.; Dodonov, V.; Dowell, J. D.; 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, 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.; Franke, G.; Gabathuler, E.; Gabathuler, K.; Garvey, J.; Gassner, J.; Gayler, J.; Gerhards, R.; Gerlich, C.; Ghazaryan, S.; Goerlich, L.; Gogitidze, N.; Grab, C.; Grassler, H.; Greenshaw, T.; Grindhammer, G.; Hadig, T.; Haidt, D.; Hajduk, L.; Haller, J.; 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.; Horisberger, R.; Hurling, S.; Ibbotson, M.; Issever, C.; Jacquet, M.; Jaffre, M.; Janauschek, L.; Janssen, X.; Jemanov, V.; Jonsson, L.; Johnson, C.; Johnson, D. P.; Jones, M. A. S.; Jung, H.; Kant, D.; Kapichine, M.; Jeamanov, V.; Jonsson, L.; Johnson, C.; Johnson, D. P.; Jones, M. A. S.; Jung, H.; 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.; Kluge, T.; Knies, G.; Koblitz, B.; Kolya, S. D.; Korbel, V.; Kostka, P.; Kotelnikov, S. K.; Koutouev, R.; Koutov, A.; Krehbiel, H.; Kroseberg, J.; Kruger, K.; Kupper, A.; Kuhr, T.; Kurca, T.; Lamb, D.; Landon, M. P. J.; 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.; 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.; Meer, D.; Mehta, A.; Meier, K.; 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.; Murin, 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.; Olsson, J. E.; Ozerov, D.; Panassik, V.; Pascaud, C.; Patel, G. D.; Peez, M.; Perez, E.; Phillips, J. P.; Pitzl, D.; Poschl, R.; Potachnikova, I.; Povh, B.; Radel, G.; Rauschenberger, J.; Reimer, P.; Reisert, B.; Reyna, D.; Risler, C.; Rizvi, E.; Robmann, P.; Roosen, R.; Rostovtsev, A.; Rusakov, S.; Rybicki, K.; Sankey, D. P. C.; Schatzel, S.; Scheins, J.; Schilling, F. P.; Schleper, P.; Schmidt, D.; Schmidt, D.; Schmidt, S.; Schmitt, S.; Schneider, M.; Schoeffel, L.; Schoning, A.; Schorner, T.; Schroder, V.; Schultz-Coulon, H. C.; Schwanenberger, C.; Sedlak, K.; Sefkow, F.; Shekelyan, V.; Sheviakov, I.; Shtarkov, L. N.; Sirois, Y.; Sloan, T.; Smirnov, P.; Soloviev, Y.; South, D.; Spaskov, V.; Specka, A.; Spitzer, H.; Stamen, R.; Stella, B.; Stiewe, J.; Straumann, U.; Swart, M.; Tasevsky, M.; Tchetchelnitski, 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.; Urban, M.; Usik, A.; Valkar, S.; Valkarova, A.; Vallee, C.; Van Mechelen, P.; Vassiliev, S.; Vazdik, Y.; Vichnevski, A.; Wacker, K.; Wagner, J.; Wallny, R.; Waugh, B.; Weber, G.; Weber, M.; Wegener, D.; Werner, C.; Werner, M.; Werner, N.; Wessels, M.; White, G.; Wiesand, S.; Wilksen, T.; Winde, M.; Winter, G. G.; Wissing, C.; Wobisch, M.; Woehrling, E. E.; Wunsch, E.; Wyatt, A. C.; Zacek, J.; Zalesak, J.; Zhang, Z.; Zhokin, A.; Zomer, F.; zur Nedden, M.
Language:English
Date of Publication (YYYY-MM-DD):2002-08
Title of Journal:European Physical Journal C
Journal Abbrev.:Eur. Phys. J. C
Volume:24
Issue / Number:4
Start Page:517
End Page:527
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:Dijet events in photon-proton collisions in which there is a large pseudorapidity separation, Deltaeta > 2.5 between the two highest E-T jets are studied with the H1 detector at HERA. The inclusive dijet cross sections are measured as functions of the longitudinal momentum fractions of the proton and photon which participate in the production of the jets, x(p)(jets) and x(gamma)(jets) respectively, Deltaeta, the pseudorapidity P separation between the two highest E-T jets, and E-T(gap), the total summed transverse energy between the jets. Rapidity gap events are defined as events in which E-T(gap) is less than E- T(cut), for E-T(cut) varied between jets 0.5 and 2.0 GeV. The fraction of dijet events with a rapidity gap is measured differentially in Deltaeta, x(p)(jets) and x(gamma)(jets). An excess of events with rapidity gaps at low values of E-T(cut) is observed above the expectation from standard photoproduction processes. This excess can be explained by the exchange of a strongly interacting colour singlet object between the jets.
External Publication Status:published
Document Type:Article
Affiliations:MPI für Kernphysik/Guest Groups and Emeriti/Particle and Nuclear Physics (B. Povh)
External Affiliations:Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany; Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, Germany; Rhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, Germany; Univ Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, England; ULB VUB, Interuniv Inst High Energies, Brussels, Belgium; Univ Antwerp, B-2020 Antwerp, Belgium; Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England; Inst Nucl Phys, Krakow, Poland; Univ Dortmund, Inst Phys, D-4600 Dortmund, Germany; CE Saclay, CEA, DSM, DAPNIA, Gif Sur Yvette, France; DESY, D-2000 Hamburg, Germany; Univ Hamburg, Inst Phys Expt, Hamburg, Germany; Univ Heidelberg, Inst Phys, Heidelberg, Germany; Univ Heidelberg, Kirchhoff Inst Phys, Heidelberg, Germany; Univ Kiel, Inst Expt & Angew Phys, D-24098 Kiel, Germany; Slovak Acad Sci, Inst Expt Phys, Kosice 04353, Slovakia; Univ Lancaster, Sch Phys & Chem, Lancaster, England; Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, England; Univ London Queen Mary & Westfield Coll, London E1 4NS, England; Lund Univ, Dept Phys, Lund, Sweden; Univ Manchester, Dept Phys, Manchester M13 9PL, Lancs, England; Univ Mediterranee, CPPM, CNRS, IN2P3, Marseille, France; Inst Theoret & Expt Phys, Moscow 117259, Russia; PN Lebedev Phys Inst, Moscow 117924, Russia; Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany; Univ Paris 11, LAL, IN2P3, CNRS, Orsay, France; Ecole Polytech, CNRS, LPNHE, IN2P3, F-91128 Palaiseau, France; Univ Paris 06, LPNHE, IN2P3, CNRS, Paris, France; Univ Paris 07, LPNHE, IN2P3, CNRS, Paris, France; Acad Sci Czech Republ, Inst Phys, Prague, Czech Republic; Charles Univ, Fac Math & Phys, Prague, Czech Republic; Univ Roma Tre, Dipartimento Fis, Rome, Italy; INFN Roma 3, Rome, Italy; Paul Scherrer Inst, Villigen, Switzerland; Yerevan Phys Inst, Yerevan 375036, Armenia; DESY, Zeuthen, Germany; Swiss Fed Inst Technol, Inst Teilchenphys, Zurich, Switzerland; Univ Zurich, Inst Phys, Zurich, Switzerland; Natl Tech Univ Athens, Dept Phys, GR-15773 Athens, Greece; Berg Univ Gesamthsch Wuppertal, Rechenzentrum, Wuppertal, Germany; Univ Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, Germany; CINVESTAV, Dept Fis Ap, Merida, Yucatan, Venezuela; Univ PJ Safarik, Kosice, Slovakia; CERN, CH-1211 Geneva 23, Switzerland; CINVESTAV, Dept Fis, Mexico City 14000, DF, Mexico
Identifiers:ISI:000177679700001 [ID No:1]
ISSN:1434-6044 [ID No:2]
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