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Measurement of photon production in the very forward direction in deep-inelastic scattering at HERA

Aaron, F. D.; Alexa, C.; Andreev, V.; Backovic, S.; Baghdasaryan, A.; Baghdasaryan, S.; Barrelet, E.; Bartel, W.; Begzsuren, K. and Belousov, A., et al. (2011) In European Physical Journal C. Particles and Fields 71(10).
Abstract
The production of photons at very small angles with respect to the proton beam direction is studied in deep-inelastic positron-proton scattering at HERA. The data are taken with the H1 detector in the years 2006 and 2007 and correspond to an integrated luminosity of 126 pb(-1). The analysis covers the range of negative four momentum transfer squared at the positron vertex 6 < Q(2) < 100 GeV2 and inelasticity 0.05 < y < 0.6. Cross sections are measured for the most energetic photon with pseudorapidity eta > 7.9 as a function of its transverse momentum p(T)(lead) and longitudinal momentum fraction of the incoming proton x(L)(lead). In addition, the cross sections are studied as a function of the sum of the longitudinal... (More)
The production of photons at very small angles with respect to the proton beam direction is studied in deep-inelastic positron-proton scattering at HERA. The data are taken with the H1 detector in the years 2006 and 2007 and correspond to an integrated luminosity of 126 pb(-1). The analysis covers the range of negative four momentum transfer squared at the positron vertex 6 < Q(2) < 100 GeV2 and inelasticity 0.05 < y < 0.6. Cross sections are measured for the most energetic photon with pseudorapidity eta > 7.9 as a function of its transverse momentum p(T)(lead) and longitudinal momentum fraction of the incoming proton x(L)(lead). In addition, the cross sections are studied as a function of the sum of the longitudinal momentum fraction x(L)(sum) L of all photons in the pseudorapidity range. > 7.9. The cross sections are normalised to the inclusive deep-inelastic scattering cross section and compared to the predictions of models of deep-inelastic scattering and models of the hadronic interactions of high energy cosmic rays. (Less)
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European Physical Journal C. Particles and Fields
volume
71
issue
10
publisher
Springer
external identifiers
  • wos:000296631800009
  • scopus:84883770770
ISSN
1434-6044
DOI
10.1140/epjc/s10052-011-1771-6
language
English
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fdf90dcc-57b8-4caa-9639-fc25e8d52880 (old id 2242956)
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2012-01-19 16:09:17
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@article{fdf90dcc-57b8-4caa-9639-fc25e8d52880,
  abstract     = {The production of photons at very small angles with respect to the proton beam direction is studied in deep-inelastic positron-proton scattering at HERA. The data are taken with the H1 detector in the years 2006 and 2007 and correspond to an integrated luminosity of 126 pb(-1). The analysis covers the range of negative four momentum transfer squared at the positron vertex 6 &lt; Q(2) &lt; 100 GeV2 and inelasticity 0.05 &lt; y &lt; 0.6. Cross sections are measured for the most energetic photon with pseudorapidity eta &gt; 7.9 as a function of its transverse momentum p(T)(lead) and longitudinal momentum fraction of the incoming proton x(L)(lead). In addition, the cross sections are studied as a function of the sum of the longitudinal momentum fraction x(L)(sum) L of all photons in the pseudorapidity range. &gt; 7.9. The cross sections are normalised to the inclusive deep-inelastic scattering cross section and compared to the predictions of models of deep-inelastic scattering and models of the hadronic interactions of high energy cosmic rays.},
  author       = {Aaron, F. D. and Alexa, C. and Andreev, V. and Backovic, S. and Baghdasaryan, A. and Baghdasaryan, S. and Barrelet, E. and Bartel, W. and Begzsuren, K. and Belousov, A. and Belov, P. and Bizot, J. C. and Boudry, V. and Bozovic-Jelisavcic, I. and Bracinik, J. and Brandt, G. and Brinkmann, M. and Brisson, V. and Britzger, D. and Bruncko, D. and Bunyatyan, A. and Buschhorn, G. and Bystritskaya, L. and Campbell, A. J. and Avila, K. B. Cantun and Ceccopieri, F. and Cerny, K. and Cerny, V. and Chekelian, V. and Contreras, J. G. and Coughlan, J. A. and Cvach, J. and Dainton, J. B. and Daum, K. 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 Egli, S. and Eliseev, A. and Elsen, E. 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, H. and Kapichine, M. and Kenyon, I. R. and Kiesling, C. and Klein, M. and Kleinwort, C. and Kluge, T. and Kogler, R. and Kostka, P. and Kraemer, M. and Kretzschmar, J. and Krueger, 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 Lopez-Fernandez, R. and Lubimov, V. and Lytkin, L. and Makankine, A. and Malinovski, E. and Marage, P. 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 Mudrinic, M. and Mueller, K. and Naumann, Th. and Newman, P. R. and Niebuhr, C. and Nikitin, D. and Nowak, G. and Nowak, K. and Olsson, J. E. 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 Ravdandorj, T. and Reimer, P. and Rizvi, E. and Robmann, P. and Roosen, R. and Rostovtsev, A. and Rotaru, M. and Tabasco, J. E. Ruiz 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 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 Sykora, T. and Thompson, P. D. and Tran, T. H. and Traynor, D. and Truol, P. and Tsakov, I. and Tseepeldorj, B. and Turnau, J. and Urban, K. and Valkarova, A. and Vallee, C. and Van Mechelen, P. and Vazdik, Y. 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       = {10},
  publisher    = {Springer},
  series       = {European Physical Journal C. Particles and Fields},
  title        = {Measurement of photon production in the very forward direction in deep-inelastic scattering at HERA},
  url          = {http://dx.doi.org/10.1140/epjc/s10052-011-1771-6},
  volume       = {71},
  year         = {2011},
}