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Measurement and QCD analysis of the diffractive deep-inelastic scattering cross section at HERA

Aktas, A.; Andreev, V.; Anthonis, T.; Antunovic, B.; Aplin, S.; Asmone, A.; Astvatsatourov, A.; Babaev, A.; Backovic, S. and Baghdasaryan, A., et al. (2006) In European Physical Journal C. Particles and Fields 48(3). p.715-748
Abstract
A detailed analysis is presented of the diffractive deep-inelastic scattering process ep -> eXY, where Y is a proton or a low mass proton excitation carrying a fraction 1 - x(IP) > 0.95 of the incident proton longitudinal momentum and the squared four-momentum transfer at the proton vertex satisfies |t| < 1 GeV2. Using data taken by the H1 experiment, the cross section is measured for photon virtualities in the range 3.5 <= Q(2) <= 1600 GeV2, triple differentially in x(IP), Q(2) and beta = x/x(P), where x is the Bjorken scaling variable. At low x(IP), the data are consistent with a factorisable x(IP) dependence, which can be described by the exchange of an effective pomeron trajectory with intercept alpha(IP)(0) = 1.118 +/-... (More)
A detailed analysis is presented of the diffractive deep-inelastic scattering process ep -> eXY, where Y is a proton or a low mass proton excitation carrying a fraction 1 - x(IP) > 0.95 of the incident proton longitudinal momentum and the squared four-momentum transfer at the proton vertex satisfies |t| < 1 GeV2. Using data taken by the H1 experiment, the cross section is measured for photon virtualities in the range 3.5 <= Q(2) <= 1600 GeV2, triple differentially in x(IP), Q(2) and beta = x/x(P), where x is the Bjorken scaling variable. At low x(IP), the data are consistent with a factorisable x(IP) dependence, which can be described by the exchange of an effective pomeron trajectory with intercept alpha(IP)(0) = 1.118 +/- 0.008(exp.)(-0.010)(+0.029)(model). Diffractive parton distribution functions and their uncertainties are determined from a next-to-leading order DGLAP QCD analysis of the Q(2)and beta dependences of the cross section. The resulting gluon distribution carries an integrated fraction of around 70% of the exchanged momentum in the Q(2) range studied. Total and differential cross sections are also measured for the diffractive charged current process e(+) p -> (v) over bar eXY and are found to be well described by predictions based on the diffractive parton distributions. The ratio of the diffractive to the inclusive neutral current ep cross sections is studied. Over most of the kinematic range, this ratio shows no significant dependence on Q(2) at fixed x(P) and x or on x at fixed Q(2) and beta. (Less)
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European Physical Journal C. Particles and Fields
volume
48
issue
3
pages
715 - 748
publisher
Springer
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  • wos:000242661400003
  • scopus:33845324510
ISSN
1434-6044
DOI
10.1140/epjc/s10052-006-0035-3
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English
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@article{3de54fe3-3924-4d1a-83a7-92dc11da2243,
  abstract     = {A detailed analysis is presented of the diffractive deep-inelastic scattering process ep -&gt; eXY, where Y is a proton or a low mass proton excitation carrying a fraction 1 - x(IP) &gt; 0.95 of the incident proton longitudinal momentum and the squared four-momentum transfer at the proton vertex satisfies |t| &lt; 1 GeV2. Using data taken by the H1 experiment, the cross section is measured for photon virtualities in the range 3.5 &lt;= Q(2) &lt;= 1600 GeV2, triple differentially in x(IP), Q(2) and beta = x/x(P), where x is the Bjorken scaling variable. At low x(IP), the data are consistent with a factorisable x(IP) dependence, which can be described by the exchange of an effective pomeron trajectory with intercept alpha(IP)(0) = 1.118 +/- 0.008(exp.)(-0.010)(+0.029)(model). Diffractive parton distribution functions and their uncertainties are determined from a next-to-leading order DGLAP QCD analysis of the Q(2)and beta dependences of the cross section. The resulting gluon distribution carries an integrated fraction of around 70% of the exchanged momentum in the Q(2) range studied. Total and differential cross sections are also measured for the diffractive charged current process e(+) p -&gt; (v) over bar eXY and are found to be well described by predictions based on the diffractive parton distributions. The ratio of the diffractive to the inclusive neutral current ep cross sections is studied. Over most of the kinematic range, this ratio shows no significant dependence on Q(2) at fixed x(P) and x or on x at fixed Q(2) and beta.},
  author       = {Aktas, A. and Andreev, V. and Anthonis, T. and Antunovic, B. and Aplin, S. and Asmone, A. and Astvatsatourov, A. and Babaev, A. and Backovic, S. and Baghdasaryan, A. and Baranov, P. and Barrelet, E. and Bartel, W. and Baudrand, S. and Baumgartner, S. and Beckingham, M. and Behnke, O. and Behrendt, O. and Belousov, A. and Berger, N. and Bizot, J. C. and Boenig, M. -O. and Boudry, V. and Bracinik, J. and Brandt, G. and Brisson, V. and Bruncko, D. and Buesser, F. W. and Bunyatyan, A. and Buschhorn, G. and Bystritskaya, L. and Campbell, A. J. and Cassol-Brunner, F. and Cerny, K. and Cerny, V. and Chekelian, V. and Contreras, J. G. and Coughlan, J. A. and Coppens, Y. R. and Cox, B. E. and Cozzika, G. and Cvach, J. and Dainton, J. B. and Dau, W. D. and Daum, K. and de Boer, Y. and Delcourt, B. and Del Degan, M. and De Roeck, A. and De Wolf, E. A. and Diaconu, C. and Dodonov, V. and Dubak, A. and Eckerlin, G. and Efremenko, V. and Egli, S. and Eichler, R. and Eisele, F. and Eliseev, A. and Elsen, E. and Essenov, S. and Falkewicz, A. and Faulkner, P. J. W. and Favart, L. and Fedotov, A. and Felst, R. and Feltesse, J. and Ferencei, J. and Finke, L. and Fleischer, M. and Flucke, G. and Fomenko, A. and Franke, G. and Frisson, T. and Gabathuler, E. and Garutti, E. and Gayler, J. and Gerlich, C. and Ghazaryan, S. and Ginzburgskaya, S. and Glazov, A. and Glushkov, I. and Goerlich, L. and Goettlich, M. and Gogitidze, N. and Gorbounov, S. and Grab, C. and Greenshaw, T. and Gregori, M. and Grell, B. R. and Grindhammer, G. and Gwilliam, C. and Haidt, D. and Hansson, Magnus and Heinzelmann, G. and Henderson, R. C. W. and Henschel, H. and Herrera, G. and Hildebrandt, M. and Hiller, K. H. and Hoffmann, D. and Horisberger, R. and Hovhannisyan, A. and Hreus, T. and Hussain, S. and Ibbotson, M. and Ismail, M. and Jacquet, M. and Janssen, X. and Jemanov, V. and Jönsson, Leif and Johnson, C. L. and Johnson, D. P. and Jung, A. W. and Jung, Hannes and Kapichine, M. and Katzy, J. and Kenyon, I. R. and Kiesling, C. and Klein, M. and Kleinwort, C. and Klimkovich, T. and Kluge, T. and Knies, G. and Knutsson, Albert and Korbel, V. and Kostka, P. and Krastev, K. and Kretzschmar, J. and Kropivnitskaya, A. and Krueger, K. and Landon, M. P. J. and Lange, W. and Lastovicka-Medin, G. and Laycock, P. and Lebedev, A. and Leibenguth, G. and Lendermann, V. and Levonian, S. and Lindfeld, L. and Lipka, K. and Liptaj, A. and List, B. and List, J. and Lobodzinska, E. and Loktionova, N. and Lopez-Fernandez, R. and Lubimov, V. and Lucaci-Timoce, A. -I. and Lueders, H. and Lux, T. and Lytkin, L. and Makankine, A. and Malden, N. and Malinovski, E. and Marage, P. and Marshall, R. and Marti, L. and Martisikova, M. and Martyn, H. -U. and Maxfield, S. J. and Mehta, A. and Meier, K. and Meyer, A. B. and Meyer, H. and Meyer, J. and Michels, V. and Mikocki, S. and Milcewicz-Mika, I. and Milstead, D. and Mladenov, D. and Mohamed, A. and Moreau, F. and Morozov, A. and Morris, J. V. and Mozer, M. U. and Mueller, K. and Murin, P. and Nankov, K. and Naroska, B. and Naumann, T. and Newman, P. R. and Niebuhr, C. and Nikiforov, A. and Nowak, G. and Nowak, K. and Nozicka, M. and Oganezov, R. and Olivier, B. and Olsson, J. E. and Osman, Sakar and Ozerov, D. and Palichik, V. and Panagoulias, I. and Papadopoulou, T. and Pascaud, C. and Patel, G. D. and Peng, H. and Perez, E. and Perez-Astudillo, D. and Perieanu, A. and Petrukhin, A. and Pitzl, D. and Placakyte, R. and Portheault, B. and Povh, B. and Prideaux, P. and Rahmat, A. J. and Raicevic, N. and Reimer, P. and Rimmer, A. and Risler, C. and Rizvi, E. and Robmann, P. and Roland, B. and Roosen, R. and Rostovtsev, A. and Rurikova, Z. and Rusakov, S. and Salvaire, F. and Sankey, D. P. C. and Sauter, M. and Sauvan, E. and Schilling, F. -P. and Schmidt, S. and Schmitt, S. and Schmitz, C. and Schoeffel, L. and Schoening, A. and Schultz-Coulon, H. -C. and Sefkow, F. and Shaw-West, R. N. and Sheviakov, I. and Shtarkov, L. N. and Sloan, T. and Smirnov, P. and Soloviev, Y. and South, D. and Spaskov, V. and Specka, A. and Steder, M. and Stella, B. and Stiewe, J. and Stoilov, A. and Straumann, U. and Sunar, D. and Tchoulakov, V. and Thompson, G. and Thompson, P. D. and Toll, T. and Tomasz, F. and Traynor, D. and Trinh, T. N. and Truol, P. and Tsakov, I. and Tsipolitis, G. and Tsurin, I. and Turnau, J. and Tzamariudaki, E. and Urban, K. and Urban, M. and Usik, A. and Utkin, D. and Valkarova, A. and Vallee, C. and Van Mechelen, P. and Trevino, A. Vargas and Vazdik, Y. and Veelken, C. and Vinokurova, S. and Volchinski, V. and Wacker, K. and Weber, G. and Weber, R. and Wegener, D. and Werner, C. and Wessels, M. and Wessling, B. and Wissing, C. and Wolf, R. and Wuensch, E. and Xella, S. and Yan, W. and Yeganov, V. and Zacek, J. and Zalesak, J. and Zhang, Z. and Zhelezov, A. and Zhokin, A. and Zhu, Y. C. and Zimmermann, J. and Zimmermann, T. and Zohrabyan, H. and Zomer, F.},
  issn         = {1434-6044},
  language     = {eng},
  number       = {3},
  pages        = {715--748},
  publisher    = {Springer},
  series       = {European Physical Journal C. Particles and Fields},
  title        = {Measurement and QCD analysis of the diffractive deep-inelastic scattering cross section at HERA},
  url          = {http://dx.doi.org/10.1140/epjc/s10052-006-0035-3},
  volume       = {48},
  year         = {2006},
}