/ Experiment-HEP arXiv:0810.3096


Measurement of Diffractive Scattering of Photons with Large Momentum Transfer at HERA


Aaron, F.D. (Bucharest U.) ; Alexa, C. (Bucharest, IFIN-HH) ; Andreev, V. (Lebedev Inst.) ; Antunovic, B. (DESY) ; Aplin, S. (DESY) ; Asmone, A. (INFN, Rome3) ; Astvatsatourov, A. (Antwerp U., WISINF) ; Bacchetta, A. (DESY) ; Backovic, S. (Montenegro U.) ; Baghdasaryan, A. (Yerevan Phys. Inst.) ; Baranov, P. (Lebedev Inst.) ; Barrelet, E. (Paris U., VI-VII) ; Bartel, W. (DESY) ; Beckingham, M. (DESY) ; Begzsuren, K. (Ulan Bator, Inst. Phys. Tech.) ; Behnke, O. (Heidelberg U.) ; Belousov, A. (Lebedev Inst.) ; Berger, N. (Zurich, ETH) ; Bizot, J.C. (Orsay, LAL) ; Boenig, M.-O. (Dortmund U.) ; Boudry, V. (Ecole Polytechnique) ; Bozovic-Jelisavcic, I. (VINCA Inst. Nucl. Sci., Belgrade) ; Bracinik, J. (Birmingham U.) ; Brandt, G. (DESY) ; Brinkmann, M. (DESY) ; Brisson, V. (Orsay, LAL) ; Bruncko, D. (Kosice, IEF) ; Bunyatyan, A. (Yerevan Phys. Inst.) ; Buschhorn, G. (Munich, Max Planck Inst.) ; Bystritskaya, L. (Moscow, ITEP) ; Campbell, A.J. (DESY) ; Cantun Avila, K.B. (Merida, IPN) ; Cassol-Brunner, F. (Marseille, CPPM) ; Cerny, K. (Charles U.) ; Cerny, V. (Comenius U.) ; Chekelian, V. (Munich, Max Planck Inst.) ; Cholewa, A. (DESY) ; Contreras, J.G. (Merida, IPN) ; Coughlan, J.A. (Rutherford) ; Cozzika, G. (DSM, DAPNIA, Saclay) ; Cvach, J. (Prague, Inst. Phys.) ; Dainton, J.B. (Liverpool U.) ; Daum, K. (Wuppertal U.) ; Deak, M. (DESY) ; de Boer, Y. (DESY) ; Delcourt, B. (Orsay, LAL) ; Del Degan, M. (Zurich, ETH) ; Delvax, J. (Antwerp U., WISINF) ; De Roeck, A. (CERN) ; De Wolf, E.A. (Antwerp U., WISINF) ; Diaconu, C. (Marseille, CPPM) ; Dodonov, V. (Heidelberg, Max Planck Inst.) ; Dossanov, A. (Munich, Max Planck Inst.) ; Dubak, A. (Munich, Max Planck Inst.) ; Eckerlin, G. (DESY) ; Efremenko, V. (Moscow, ITEP) ; Egli, S. (PSI, Villigen) ; Eliseev, A. (Lebedev Inst.) ; Elsen, E. (DESY) ; Essenov, S. (Moscow, ITEP) ; Falkiewicz, A. (Cracow, INP) ; Faulkner, P.J.W. (Birmingham U.) ; Favart, L. (Antwerp U., WISINF) ; Fedotov, A. (Moscow, ITEP) ; Felst, R. (DESY) ; Feltesse, J. (Hamburg U.) ; Ferencei, J. (Kosice, IEF) ; Finke, L. (DESY) ; Fleischer, M. (DESY) ; Fomenko, A. (Lebedev Inst.) ; Gabathuler, E. (Liverpool U.) ; Gayler, J. (DESY) ; Ghazaryan, Samvel (Yerevan Phys. Inst.) ; Glazov, A. (DESY) ; Glushkov, I. (DESY, Zeuthen) ; Goerlich, L. (Cracow, INP) ; Goettlich, M. (Hamburg U.) ; Gogitidze, N. (Lebedev Inst.) ; Gouzevitch, M. (Ecole Polytechnique) ; Grab, C. (Zurich, ETH) ; Greenshaw, T. (Liverpool U.) ; Grell, B.R. (DESY) ; Grindhammer, G. (Munich, Max Planck Inst.) ; Habib, S. (World Lab, Lausanne) ; Haidt, D. (DESY) ; Hansson, M. (Lund U.) ; Helebrant, C. (DESY) ; Henderson, R.C.W. (Lancaster U.) ; Henschel, H. (DESY, Zeuthen) ; Herrera, G. (CINVESTAV, IPN) ; Hildebrandt, M. (PSI, Villigen) ; Hiller, K.H. (DESY, Zeuthen) ; Hoffmann, D. (Marseille, CPPM) ; Horisberger, R. (PSI, Villigen) ; Hovhannisyan, A. (Yerevan Phys. Inst.) ; Hreus, T. (Kosice U.) ; Jacquet, M. (Orsay, LAL) ; Janssen, M.E. (DESY) ; Janssen, X. (Antwerp U., WISINF) ; Jemanov, V. (Hamburg U.) ; Jonsson, L. (Lund U.) ; Johnson, D.P. (Antwerp U., WISINF) ; Jung, Andreas Werner (Kirchhoff Inst. Phys.) ; Jung, H. (DESY) ; Kapichine, M. (Dubna, JINR) ; Katzy, J. (DESY) ; Kenyon, I.R. (Birmingham U.) ; Kiesling, C. (Munich, Max Planck Inst.) ; Klein, M. (Liverpool U.) ; Kleinwort, C. (DESY) ; Klimkovich, T. (DESY) ; Kluge, T. (Liverpool U.) ; Knutsson, A. (DESY) ; Kogler, R. (Munich, Max Planck Inst.) ; Korbel, V. (DESY) ; Kostka, P. (DESY, Zeuthen) ; Kraemer, M. (DESY) ; Krastev, K. (DESY) ; Kretzschmar, J. (Liverpool U.) ; Kropivnitskaya, A. (Moscow, ITEP) ; Kruger, K. (Kirchhoff Inst. Phys.) ; Kutak, K. (DESY) ; Landon, M.P.J. (Queen Mary, U. of London) ; Lange, W. (DESY, Zeuthen) ; Lastovicka-Medin, G. (Montenegro U.) ; Laycock, P. (Liverpool U.) ; Lebedev, A. (Lebedev Inst.) ; Leibenguth, G. (Zurich, ETH) ; Lendermann, V. (Kirchhoff Inst. Phys.) ; Levonian, S. (DESY) ; Li, G. (Orsay, LAL) ; Lipka, K. (Hamburg U.) ; Liptaj, A. (Munich, Max Planck Inst.) ; List, B. (Hamburg U.) ; List, J. (DESY) ; Loktionova, N. (Lebedev Inst.) ; Lopez-Fernandez, R. (CINVESTAV, IPN) ; Lubimov, V. (Moscow, ITEP) ; Lucaci-Timoce, A.-I. (DESY) ; Lytkin, L. (Heidelberg, Max Planck Inst.) ; Makankine, A. (Dubna, JINR) ; Malinovski, E. (Lebedev Inst.) ; Marage, P. (Antwerp U., WISINF) ; Marti, Ll. (DESY) ; Martyn, H.-U. (Aachen, Tech. Hochsch.) ; Maxfield, S.J. (Liverpool U.) ; Mehta, A. (Liverpool U.) ; Meier, K. (Kirchhoff Inst. Phys.) ; Meyer, A.B. (DESY) ; Meyer, H. (DESY) ; Meyer, H. (Wuppertal U., Dept. Math.) ; Meyer, J. (DESY) ; Michels, V. (DESY) ; Mikocki, S. (Cracow, INP) ; Milcewicz-Mika, I. (Cracow, INP) ; Moreau, F. (Ecole Polytechnique) ; Morozov, A. (Dubna, JINR) ; Morris, J.V. (Rutherford) ; Mozer, Matthias Ulrich (Antwerp U., WISINF) ; Mudrinic, M. (VINCA Inst. Nucl. Sci., Belgrade) ; Muller, K. (Zurich U.) ; Murin, P. (Kosice U.) ; Nankov, K. (Sofiya, Inst. Nucl. Res.) ; Naroska, B. (Hamburg U.) ; Naumann, Th. (DESY, Zeuthen) ; Newman, Paul R. (Birmingham U.) ; Niebuhr, C. (DESY) ; Nikiforov, A. (DESY) ; Nowak, G. (Cracow, INP) ; Nowak, K. (Zurich U.) ; Nozicka, M. (DESY) ; Olivier, B. (Munich, Max Planck Inst.) ; Olsson, J.E. (DESY) ; Osman, S. (Lund U.) ; Ozerov, D. (Moscow, ITEP) ; Palichik, V. (Dubna, JINR) ; Panagoulias, I. (Natl. Tech. U., Athens) ; Pandurovic, M. (VINCA Inst. Nucl. Sci., Belgrade) ; Papadopoulou, Th. (Natl. Tech. U., Athens) ; Pascaud, C. (Orsay, LAL) ; Patel, G.D. (Liverpool U.) ; Pejchal, O. (Charles U.) ; Peng, H. (DESY) ; Perez, E. (CERN) ; Petrukhin, A. (Moscow, ITEP) ; Picuric, I. (Montenegro U.) ; Piec, S. (DESY, Zeuthen) ; Pitzl, D. (DESY) ; Placakyte, R. (DESY) ; Polifka, R. (Charles U.) ; Povh, B. (Heidelberg, Max Planck Inst.) ; Preda, T. (Bucharest, IFIN-HH) ; Radescu, V. (DESY) ; Rahmat, A.J. (Liverpool U.) ; Raicevic, N. (Montenegro U.) ; Raspiareza, A. (Munich, Max Planck Inst.) ; Ravdandorj, T. (Ulan Bator, Inst. Phys. Tech.) ; Reimer, P. (Prague, Inst. Phys.) ; Rizvi, E. (Queen Mary, U. of London) ; Robmann, P. (Zurich U.) ; Roland, B. (Antwerp U., WISINF) ; Roosen, R. (Antwerp U., WISINF) ; Rostovtsev, A. (Moscow, ITEP) ; Rotaru, M. (Bucharest, IFIN-HH) ; Ruiz Tabasco, J.E. (Merida, IPN) ; Rurikova, Z. (DESY) ; Rusakov, S. (Lebedev Inst.) ; Salek, D. (Charles U.) ; Salvaire, F. (DESY) ; Sankey, D.P.C. (Rutherford) ; Sauter, M. (Zurich, ETH) ; Sauvan, E. (Marseille, CPPM) ; Schmidt, S. (DESY) ; Schmitt, S. (DESY) ; Schmitz, C. (Zurich U.) ; Schoeffel, L. (DSM, DAPNIA, Saclay) ; Schoning, A. (Zurich U.) ; Schultz-Coulon, H.-C. (Kirchhoff Inst. Phys.) ; Sefkow, F. (DESY) ; Shaw-West, R.N. (Birmingham U.) ; Sheviakov, I. (Lebedev Inst.) ; Shtarkov, L.N. (Lebedev Inst.) ; Shushkevich, S. (Munich, Max Planck Inst.) ; Sloan, T. (Lancaster U.) ; Smiljanic, Ivan (VINCA Inst. Nucl. Sci., Belgrade) ; Smirnov, P. (Lebedev Inst.) ; Soloviev, Y. (Lebedev Inst.) ; Sopicki, P. (Cracow, INP) ; South, D. (Dortmund U.) ; Spaskov, V. (Dubna, JINR) ; Specka, Arnd E. (Ecole Polytechnique) ; Staykova, Z. (DESY) ; Steder, M. (DESY) ; Stella, B. (INFN, Rome3) ; Straumann, U. (Zurich U.) ; Sunar, D. (Antwerp U., WISINF) ; Sykora, T. (Antwerp U., WISINF) ; Tchoulakov, V. (Dubna, JINR) ; Thompson, G. (Queen Mary, U. of London) ; Thompson, P.D. (Birmingham U.) ; Toll, T. (DESY) ; Tomasz, F. (Kosice, IEF) ; Tran, T.H. (Orsay, LAL) ; Traynor, D. (Queen Mary, U. of London) ; Trinh, T.N. (Marseille, CPPM) ; Truol, P. (Zurich U.) ; Tsakov, I. (Sofiya, Inst. Nucl. Res.) ; Tseepeldorj, B. (Mongolian Natl. U.) ; Tsurin, I. (DESY, Zeuthen) ; Turnau, J. (Cracow, INP) ; Tzamariudaki, E. (Munich, Max Planck Inst.) ; Urban, K. (Kirchhoff Inst. Phys.) ; Valkarova, A. (Charles U.) ; Vallee, C. (Marseille, CPPM) ; Van Mechelen, P. (Antwerp U., WISINF) ; Vargas Trevino, A. (DESY) ; Vazdik, Y. (Lebedev Inst.) ; Vinokurova, S. (DESY) ; Volchinski, V. (Yerevan Phys. Inst.) ; Wegener, D. (Dortmund U.) ; Wessels, M. (DESY) ; Wissing, Ch. (DESY) ; Wunsch, E. (DESY) ; Yeganov, V. (Yerevan Phys. Inst.) ; Zacek, J. (Charles U.) ; Zalesak, J. (Prague, Inst. Phys.) ; Zhang, Z. (Orsay, LAL) ; Zhelezov, A. (Moscow, ITEP) ; Zhokin, A. (Moscow, ITEP) ; Zhu, Y.C. (DESY) ; Zimmermann, T. (Zurich, ETH) ; Zohrabyan, H. (Yerevan Phys. Inst.) ; Zomer, F. (Orsay, LAL)

Published in: Phys.Lett.
Year: 2009
Vol.: B672
Page No: 219-226
Pages: 17

Abstract: The first measurement of diffractive scattering of quasi-real photons with large momentum transfer gamma p -> gamma Y, where Y is the proton dissociative system, is made using the H1 detector at HERA. The measurement is performed for initial photon virtualities Q^2 < 0.01 GeV^2. Cross sections are measured as a function of W, the incident photon-proton entre of mass energy, and t, the square of the four-momentum transferred at the proton vertex, in the range 175 < W < 247 GeV and 4<|t|<36 GeV^2. The W dependence is well described by a model based on perturbative QCD using a leading logarithmic approximation of the BFKL evolution. The measured |t| dependence is harder than that predicted by the model and those observed in exclusive vector meson production.

Web-Page: http://durpdg.dur.ac.uk/cgi-hepdata/hepreac/8024316; http://inspirebeta.net/record/799783/files/d08-077f1a.png; http://inspirebeta.net/record/799783/files/d08-077f1b.png; http://inspirebeta.net/record/799783/files/d08-077f2a.png; http://inspirebeta.net/record/799783/files/d08-077f2b.png; http://inspirebeta.net/record/799783/files/d08-077f2c.png; http://inspirebeta.net/record/799783/files/d08-077f2d.png; http://inspirebeta.net/record/799783/files/d08-077f2e.png; http://inspirebeta.net/record/799783/files/d08-077f2f.png; http://inspirebeta.net/record/799783/files/d08-077f3.png; http://inspirebeta.net/record/799783/files/d08-077f4.png

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