Measurement of diffractive scattering of photons with large momentum transfer at HERA

被引:4
作者
Aaron, F. D. [7 ,49 ]
Alexa, C. [7 ]
Andreev, V. [25 ]
Antunovic, B.
Aplin, S.
Asmone, A. [34 ,35 ]
Astvatsatourov, A. [5 ,6 ]
Bacchetta, A.
Backovic, S. [31 ]
Baghdasaryan, A. [39 ]
Baranov, R. [25 ]
Barrelet, E. [29 ,30 ]
Bartel, W.
Beckingham, M.
Begzsuren, K. [37 ]
Behnk, O. [15 ]
Belousov, A. [25 ]
Berger, N. [42 ]
Bizot, J. C. [27 ]
Boenig, M. -O. [10 ]
Boudry, V. [28 ]
Bozovic-Jelisavcic, I. [3 ]
Bracinik, J. [4 ]
Brandt, G.
Brinkmann, M.
Brisson, V. [27 ]
Bruncko, D. [17 ]
Bunyatyan, A. [14 ,40 ]
Buschhorn, G. [26 ]
Bystritskaya, L. [24 ]
Campbell, A. J.
Avila, K. B. Cantun [23 ]
Cassol-Brunner, F. [22 ]
Cerny, K. [33 ]
Cerny, V. [17 ,48 ]
Chekelian, V. [26 ]
Cholewa, A.
Contreras, J. G. [23 ]
Coughlan, J. A. [8 ]
Cozzika, G. [12 ]
Cvach, J. [32 ]
Dainton, J. B. [19 ]
Daum, K. [39 ,45 ]
Deak, M.
de Boer, Y.
Delcourt, B. [27 ]
Del Degan, M. [42 ]
Delvax, J. [5 ,6 ]
De Roeck, A. [47 ]
De Wolf, E. A. [5 ,6 ]
机构
[1] DESY, D-2000 Hamburg, Germany
[2] Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, Germany
[3] Vinca Inst Nucl Sci, Belgrade, Serbia
[4] Univ Birmingham, Sch Phys & Astron, Birmingham, W Midlands, England
[5] ULB VUB, Interuniv Inst High Energies, Brussels, Belgium
[6] Univ Antwerp, B-2020 Antwerp, Belgium
[7] NIPNE, Bucharest, Romania
[8] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England
[9] Inst Nucl Phys, Krakow, Poland
[10] TU Dortmund, Inst Phys, Dortmund, Germany
[11] Joint Inst Nucl Res, Dubna, Russia
[12] CE Saclay, DSM DAPNIA, CEA, Gif Sur Yvette, France
[13] Univ Hamburg, Inst Expt Phys, Hamburg, Germany
[14] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany
[15] Heidelberg Univ, Inst Phys, D-6900 Heidelberg, Germany
[16] Heidelberg Univ, Kirchhoff Inst Phys, D-6900 Heidelberg, Germany
[17] Slovak Acad Sci, Inst Expt Phys, Kosice 04353, Slovakia
[18] Univ Lancaster, Dept Phys, Lancaster, England
[19] Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, England
[20] Queen Mary Univ London, London E1 4NS, England
[21] Lund Univ, Dept Phys, Lund, Sweden
[22] Univ Mediterranee, CPPM, CNRS, IN2P3, Marseille, France
[23] CINVESTAV, Dept Fis Aplicada, Merida, Yucatan, Mexico
[24] Inst Theoret & Expt Phys, Moscow 117259, Russia
[25] PN Lebedev Phys Inst, Moscow 117924, Russia
[26] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany
[27] Univ Paris 11, CNRS, LAL, IN2P3, F-91405 Orsay, France
[28] Ecole Polytech, CNRS, LLR, IN2P3, F-91128 Palaiseau, France
[29] Univ Paris 06, CNRS, LPNHE, IN2P3, Paris, France
[30] Univ Paris 07, CNRS, LPNHE, IN2P3, Paris, France
[31] Univ Montenegro, Fac Sci, Podgorica, Montenegro
[32] Acad Sci Czech Republ, Inst Phys, Prague, Czech Republic
[33] Charles Univ Prague, Fac Math & Phys, Prague, Czech Republic
[34] Univ Roma Tre, Dipartimento Fis, Rome, Italy
[35] INFN Roma 3, Rome, Italy
[36] Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia, Bulgaria
[37] Mongolian Acad Sci, Inst Phys & Technol, Ulaanbaatar, Mongolia
[38] Paul Scherrer Inst, Villigen, Switzerland
[39] Univ Wuppertal, Fachbereich C, Wuppertal, Germany
[40] Yerevan Phys Inst, Yerevan 375036, Armenia
[41] DESY, Zeuthen, Germany
[42] ETH, Inst Teilchenphys, Zurich, Switzerland
[43] Univ Zurich, Inst Phys, Zurich, Switzerland
[44] Natl Tech Univ Athens, Dept Phys, GR-15773 Athens, Greece
[45] Univ Wuppertal, Rechenzentrum, Wuppertal, Germany
[46] Safarik Univ, Kosice, Slovakia
[47] CERN, Geneva, Switzerland
[48] Comenius Univ, Bratislava, Slovakia
[49] Univ Bucharest, Fac Phys, Bucharest, Romania
[50] Ulaanbaatar Univ, Ulaanbaatar, Mongolia
基金
瑞士国家科学基金会; 英国科学技术设施理事会;
关键词
RAPIDITY GAPS; J/PSI MESONS; PHOTOPRODUCTION; PROTON; CALORIMETER; DEPENDENCE; JETS;
D O I
10.1016/j.physletb.2009.01.019
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
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 GeV2. Single differential cross sections are Measured as a function of W, the incident photon-proton centre 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 GeV2. 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. (C) 2009 Published by Elsevier B.V.
引用
收藏
页码:219 / 226
页数:8
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