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A measurement of the T dependence of the helicity structure of diffractive ρ meson electroproduction at HERA

  • C. Adloff
  • , V. Andreev
  • , B. Andrieu
  • , T. Anthonis
  • , V. Arkadov
  • , A. Astvatsatourov
  • , A. Babaev
  • , J. Bähr
  • , P. Baranov
  • , E. Barrelet
  • , W. Bartel
  • , J. Becker
  • , A. Beglarian
  • , O. Behnke
  • , C. Beier
  • , A. Belousov
  • , Ch Berger
  • , T. Berndt
  • , J. C. Bizot
  • , J. Böhme
  • V. Boudry, W. Braunschweig, V. Brisson, H. B. Bröker, D. P. Brown, W. Brückner, D. Bruncko, J. Bürger, F. W. Büsser, A. Bunyatyan, A. Burrage, G. Buschhorn, L. Bystritskaya, A. J. Campbell, J. Cao, S. Caron, F. Cassol-Brunner, D. Clarke, B. Clerbaux, C. Collard, J. G. Contreras, Y. R. Coppens, J. A. Coughlan, M. C. Cousinou, B. E. Cox, G. Cozzika, J. Cvach, J. B. Dainton, W. D. Dau, K. Daum, M. Davidsson, B. Delcourt, N. Delerue, R. Demirchyan, A. De Roeck, E. A. De Wolf, C. Diaconu, J. Dingfelder, P. Dixon, V. Dodonov, J. D. Dowell, A. Droutskoi, A. Dubak, C. Duprel, G. Eckerlin, D. Eckstein, V. Efremenko, S. Egli, R. Eichler, F. Eisele, E. Eisenhandler, M. Ellerbrock, E. Elsen, M. Erdmann, W. Erdmannj, P. J.W. Faulkner, L. Favart, A. Fedotov, R. Felst, J. Ferencei, S. Ferron, M. Fleischer, Y. H. Fleming, G. Flügge, A. Fomenko, I. Foresti, J. Formánek, G. Franke, E. Gabathuler, K. Gabathuler, J. Garvey, J. Gassner, J. Gayler, R. Gerhards, C. Gerlich, S. Ghazaryan, L. Goerlich, N. Gogitidze, C. Grab, V. Grabski, H. Grässler, T. Greenshaw, G. Grindhammer, T. Hadig, D. Haidt, L. Hajduk, J. Haller, W. J. Haynes, B. Heinemann, G. Heinzelmann, R. C.W. Henderson, S. Hengstmann, H. Henschel, R. Heremans, G. Herrera, I. Herynek, M. Hildebrandt, M. Hilgers, K. H. Hiller, J. Hladký, P. Höting, D. Hoffmann, R. Horisberger, A. Hovhannisyan, S. Hurling, M. Ibbotson, C. Işsever, M. Jacquet, M. Jaffre, L. Janauschek, X. Janssen, V. Jemanov, L. Jönsson, C. Johnson, D. P. Johnson, M. A.S. Jones, H. Jung, D. Kant, M. Kapichine, M. Karlsson, O. Karschnick, F. Keil, N. Keller, J. Kennedy, I. R. Kenyon, S. Kermiche, C. Kiesling, P. Kjellberg, M. Klein, C. Kleinwort, T. Kluge, G. Knies, B. Koblitz, S. D. Kolya, V. Korbel, P. Kostka, S. K. Kotelnikov, R. Koutouev, A. Koutov, H. Krehbiel, J. Kroseberg, K. Krüger, A. Küpper, T. Kuhr, T. Kurča, D. Lamb, M. P.J. Landon, W. Lange, T. Laštovicka, P. Laycock, E. Lebailly, A. Lebedev, B. Leißner, R. Lemrani, V. Lendermann, S. Levonian, M. Lindstroem, B. List, E. Lobodzinska, B. Lobodzinski, A. Loginov, N. Loktionova, V. Lubimov, S. Lüders, D. Lüke, L. Lytkin, H. Mahlke-Krüger, N. Malden, E. Malinovski, I. Malinovski, R. Maracek, P. Marage, J. Marks, R. Marshall, H. U. Martyn, J. Martyniak, S. J. Maxfield, D. Meer, A. Mehta, K. Meier, A. B. Meyer, H. Meyer, J. Meyer, P. O. Meyer, S. Mikocki, D. Milstead, T. Mkrtchyan, R. Mohr, S. Mohrdieck, M. N. Mondragon, F. Moreau, A. Morozov, J. V. Morris, K. Müller, P. Murín, V. Nagovizin, B. Naroska, J. Naumann, Th Naumann, G. Nellen, P. R. Newman, F. Niebergall, C. Niebuhr, O. Nix, G. Nowak, J. E. Olsson, D. Ozerov, V. Panassik, C. Pascaud, G. D. Patel, M. Peez, E. Perez, J. P. Phillips, D. Pitzl, R. Pöschl, I. Potachnikova, B. Povh, G. Rädel, J. Rauschenberger, P. Reimer, B. Reisert, D. Reyna, C. Risler, E. Rizvi, P. Robmann, R. Roosen, A. Rostovtsev, S. Rusakov, K. Rybicki, D. P.C. Sankey, S. Schätzel, J. Scheins, F. P. Schillings, P. Schleper, D. Schmidt, D. Schmidt, S. Schmidt, S. Schmitt, M. Schneider, L. Schoeffel, A. Schöning, T. Schörner, V. Schröder, H. C. Schultz-Coulon, C. Schwanenberger, K. Sedlák, F. Sefkow, V. Shekelyan, I. Sheviakov, L. N. Shtarkov, Y. Sirois, T. Sloan, P. Smirnov, Y. Soloviev, D. South, V. Spaskov, A. Specka, H. Spitzer, R. Stamen, B. Stella, J. Stiewe, U. Straumann, M. Swart, M. Taševský, S. Tchetchelnitski, G. Thompson, P. D. Thompson, N. Tobien, F. Tomasz, D. Traynor, P. Truöl, G. Tsipolitis, I. Tsurin, J. Turnau, J. E. Turney, E. Tzamariudaki, S. Udluft, M. Urban, A. Usik, S. Valkár, A. Valkárová, C. Vallée, P. Van Mechelen, S. Vassiliev, Y. Vazdik, A. Vichnevski, M. Vorobiev, K. Wacker, J. Wagner, R. Wallny, B. Waugh, G. Weber, M. Weber, D. Wegener, C. Werner, M. Werner, N. Werner, M. Wessels, G. White, S. Wiesand, T. Wilksen, M. Winde, G. G. Winter, Ch Wissing, M. Wobisch, E. E. Woehrling, E. Wünsch, A. C. Wyatt, J. Žáček, J. Zálešák, Z. Zhang, A. Zhokin, F. Zomer, M. zur Nedden
  • Bergische Universität Gesamthochschule Wuppertal
  • P.N. Lebedev Physical Institute of the Russian Academy of Sciences
  • Inter-University Institute for High Energies ULB-VUB
  • University of Antwerp
  • c/o DESY
  • Institute for Theoretical and Experimental Physics
  • Universités Paris VI and VII
  • Physik-Institut der Universität Zürich
  • Yerevan Physics Institute
  • University of Heidelberg
  • RWTH Aachen University
  • Laboratoire de l'Accélérateur Linéaire
  • Max-Planck-Institut für Kernphysik
  • Institute of Experimental Physics Slovak Academy of Sciences
  • Universität Hamburg
  • University of Liverpool
  • Max-Planck-Institut für Physik
  • Aix-Marseille Université
  • CCLRC Rutherford Appleton Laboratory
  • University of Dortmund
  • University of Birmingham
  • University of Manchester
  • Institut Pierre Simon Laplace, CNRS and CEA
  • Institute of Physics of the Czech Academy of Sciences
  • Christian-Albrechts-University Kiel
  • Lund University
  • European Organization for Nuclear Research
  • Queen Mary University of London
  • Paul Scherrer Institut
  • ETH Zurich
  • Universität Karlsruhe/Forschungszentrum Karlsruhe
  • Charles University
  • Institute for Nuclear Physics
  • Lancaster University
  • CINVESTAV-IPN
  • Joint Institute for Nuclear Research, Dubna
  • University of P.J. Šafárik
  • Dept. Fis. Ap. CINVESTAV
  • University Roma Tre
  • National Technical University of Athens

Résultats de recherche: Contribution à un journalArticleRevue par des pairs

28 Citations (Scopus)

Résumé

The helicity structure of the diffractive electroproduction of ρ mesons, e + p → e + ρ + Y, is studied in a previously unexplored region of large four-momentum transfer squared at the proton vertex, t: 0 < t′ < 3 GeV2, where t′ = t- tmin The data used are collected with the H1 detector at HERA in the kinematic domain 2,5 < Q2 < 60 GeV2, 40 < W < 120 GeV. No t dependence of the r00 04 spin density matrix element is found. A significant t dependent helicity non-conservation from the virtual photon to the ρ meson is observed for the spin density matrix element combinations r00 5 + 2r11 5 and r00 1 + 2r11 1. These t dependences are consistently described by a perturbative QCD model based on the exchange of two gluons.

langue originaleAnglais
Pages (de - à)25-39
Nombre de pages15
journalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume539
Numéro de publication1-2
Les DOIs
étatPublié - 11 juil. 2002

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