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Diffractive dijet photoproduction in ep collisions at HERA

Aaron, F. D.; Alexa, C.; Andreev, V.; Backovic, S.; Baghdasaryan, A.; Barrelet, E.; Bartel, W.; Begzsuren, K.; Belousov, A. and Bizot, J. C., et al. (2010) In European Physical Journal C. Particles and Fields 70(1-2). p.15-37
Abstract
Measurements are presented of single and double-differential dijet cross sections in diffractive photoproduction based on a data sample with an integrated luminosity of 47 pb(-1). The events are of the type ep -> eXY, where the hadronic system X contains at least two jets and is separated by a large rapidity gap from the system Y, which consists of a leading proton or low-mass proton excitation. The dijet cross sections are compared with QCD calculations at next-to-leading order and with a Monte Carlo model based on leading order matrix elements with parton showers. The measured cross sections are smaller than those obtained from the next-to-leading order calculations by a factor of about 0.6. This suppression factor has no significant... (More)
Measurements are presented of single and double-differential dijet cross sections in diffractive photoproduction based on a data sample with an integrated luminosity of 47 pb(-1). The events are of the type ep -> eXY, where the hadronic system X contains at least two jets and is separated by a large rapidity gap from the system Y, which consists of a leading proton or low-mass proton excitation. The dijet cross sections are compared with QCD calculations at next-to-leading order and with a Monte Carlo model based on leading order matrix elements with parton showers. The measured cross sections are smaller than those obtained from the next-to-leading order calculations by a factor of about 0.6. This suppression factor has no significant dependence on the fraction x (gamma) of the photon four-momentum entering the hard subprocess. Ratios of the diffractive to the inclusive dijet cross sections are measured for the first time and are compared with Monte Carlo models. (Less)
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European Physical Journal C. Particles and Fields
volume
70
issue
1-2
pages
15 - 37
publisher
Springer
external identifiers
  • wos:000284423800003
  • scopus:78449289477
ISSN
1434-6044
DOI
10.1140/epjc/s10052-010-1448-6
language
English
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yes
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c5cb468c-cdc1-453a-922f-df0edf60eec6 (old id 1772516)
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2011-02-02 19:58:33
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@article{c5cb468c-cdc1-453a-922f-df0edf60eec6,
  abstract     = {Measurements are presented of single and double-differential dijet cross sections in diffractive photoproduction based on a data sample with an integrated luminosity of 47 pb(-1). The events are of the type ep -> eXY, where the hadronic system X contains at least two jets and is separated by a large rapidity gap from the system Y, which consists of a leading proton or low-mass proton excitation. The dijet cross sections are compared with QCD calculations at next-to-leading order and with a Monte Carlo model based on leading order matrix elements with parton showers. The measured cross sections are smaller than those obtained from the next-to-leading order calculations by a factor of about 0.6. This suppression factor has no significant dependence on the fraction x (gamma) of the photon four-momentum entering the hard subprocess. Ratios of the diffractive to the inclusive dijet cross sections are measured for the first time and are compared with Monte Carlo models.},
  author       = {Aaron, F. D. and Alexa, C. and Andreev, V. and Backovic, S. and Baghdasaryan, A. and Barrelet, E. and Bartel, W. and Begzsuren, K. and Belousov, A. and Bizot, J. C. and Boudry, V. and Bozovic-Jelisavcic, I. and Bracinik, J. and Brandt, G. and Brinkmann, M. and Brisson, V. and Bruncko, D. and Bunyatyan, A. and Buschhorn, G. and Bystritskaya, L. and Campbell, A. J. and Cantun Avila, K. B. and Cerny, K. and Cerny, V. and Chekelian, V. and Cholewa, A. and Contreras, J. G. and Coughlan, J. A. and Cvach, J. and Dainton, J. B. and Daum, K. and Deak, M. and Delcourt, B. and Delvax, J. and De Wolf, E. A. and Diaconu, C. and Dobre, M. and Dodonov, V. and Dossanov, A. and Dubak, A. and Eckerlin, G. and Efremenko, V. and Egli, S. and Eliseev, A. and Elsen, E. and Falkiewicz, A. and Favart, L. and Fedotov, A. and Felst, R. and Feltesse, J. and Ferencei, J. and Fischer, D. -J. and Fleischer, M. and Fomenko, A. and Gabathuler, E. and Gayler, J. and Ghazaryan, S. and Glazov, A. and Goerlich, L. and Gogitidze, N. and Gouzevitch, M. and Grab, C. and Grebenyuk, A. and Greenshaw, T. and Grell, B. R. and Grindhammer, G. and Habib, S. and Haidt, D. and Helebrant, C. and Henderson, R. C. W. and Hennekemper, E. and Henschel, H. and Herbst, M. and Herrera, G. and Hildebrandt, M. and Hiller, K. H. and Hoffmann, D. and Horisberger, R. and Hreus, T. and Huber, F. and Jacquet, M. and Janssen, X. and Jönsson, Leif and Jung, A. W. and Jung, H. and Kapichine, M. and Katzy, J. and Kenyon, I. R. and Kiesling, C. and Klein, M. and Kleinwort, C. and Kluge, T. and Knutsson, A. and Kogler, R. and Kostka, P. and Kraemer, M. and Kretzschmar, J. and Kropivnitskaya, A. and Krueger, K. and Kutak, K. and Landon, M. P. J. and Lange, W. and Lastovicka-Medin, G. and Laycock, P. and Lebedev, A. and Lendermann, V. and Levonian, S. and Lipka, K. and List, B. and List, J. and Loktionova, N. and Lopez-Fernandez, R. and Lubimov, V. and Makankine, A. and Malinovski, E. and Marage, P. and Marti, Ll. and Martyn, H. -U. and Maxfield, S. J. and Mehta, A. and Meyer, A. B. and Meyer, H. and Meyer, J. and Mikocki, S. and Milcewicz-Mika, I. and Moreau, F. and Morozov, A. and Morris, J. V. and Mozer, M. U. and Mudrinic, M. and Mueller, K. and Naumann, Th. and Newman, P. R. and Niebuhr, C. and Nikiforov, A. and Nikitin, D. and Nowak, G. and Nowak, K. and Olsson, J. E. and Osman, Sakar and Ozerov, D. and Pahl, P. and Palichik, V. and Panagoulias, I. and Pandurovic, M. and Papadopoulou, Th. and Pascaud, C. and Patel, G. D. and Perez, E. and Petrukhin, A. and Picuric, I. and Piec, S. and Pirumov, H. and Pitzl, D. and Placakyte, R. and Pokorny, B. and Polifka, R. and Povh, B. and Radescu, V. and Raicevic, N. and Raspiareza, A. and Ravdandorj, T. and Reimer, P. and Rizvi, E. and Robmann, P. and Roosen, R. and Rostovtsev, A. and Rotaru, M. and Ruiz Tabasco, J. E. and Rusakov, S. and Salek, D. and Sankey, D. P. C. and Sauter, M. and Sauvan, E. and Schmitt, S. and Schoeffel, L. and Schoening, A. and Schultz-Coulon, H. -C. and Sefkow, F. and Shaw-West, R. N. and Shtarkov, L. N. and Shushkevich, S. and Sloan, T. and Smiljanic, I. and Soloviev, Y. and Sopicki, P. and South, D. and Spaskov, V. and Specka, A. and Staykova, Z. and Steder, M. and Stella, B. and Stoicea, G. and Straumann, U. and Sunar, D. and Sykora, T. and Thompson, G. and Thompson, P. D. and Toll, T. and Tran, T. H. and Traynor, D. and Truoel, P. and Tsakov, I. and Tseepeldorj, B. and Turnau, J. and Urban, K. and Valkarova, A. and Vallee, C. and Van Mechelen, P. and Trevino, A. Vargas and Vazdik, Y. and von den Driesch, M. and Wegener, D. and Wuensch, E. and Zacek, J. and Zalesak, J. and Zhang, Z. and Zhokin, A. and Zohrabyan, H. and Zomer, F.},
  issn         = {1434-6044},
  language     = {eng},
  number       = {1-2},
  pages        = {15--37},
  publisher    = {Springer},
  series       = {European Physical Journal C. Particles and Fields},
  title        = {Diffractive dijet photoproduction in ep collisions at HERA},
  url          = {http://dx.doi.org/10.1140/epjc/s10052-010-1448-6},
  volume       = {70},
  year         = {2010},
}