Exclusive leptoproduction of ρ0 mesons from hydrogen at intermediate virtual photon energies

A. Airapetian, N. Akopov, I. Akushevich, M. Amarian, J. Arrington, E. C. Aschenauer, H. Avakian, R. Avakian, A. Avetissian, E. Avetissian, P. Bailey, B. Bains, C. Baumgarten, M. Beckmann, S. Belostotski, S. Bernreuther, N. Bianchi, H. Böttcher, A. Borissov, M. BouwhuisJ. Brack, S. Brauksiepe, B. Braun, W. Brückner, A. Briill, P. Budz, H. J. Bulten, G. P. Capitani, P. Carter, P. Chumney, E. Cisbani, G. R. Court, P. F. Dalpiaz, R. De Leo, L. De Nardo, E. De Sanctis, D. De Schepper, E. Devitsin, P. K.A. de Witt Huberts, P. Di Nezza, V. Djordjadze, M. Duren, A. Dvoredsky, G. Elbakian, J. Ely, A. Fantoni, A. Fechtchenko, M. Ferro-Luzzi, K. Fiedler, B. W. Filippone, H. Fischer, B. Fox, J. Franz, S. Frullani, Y. Garber, F. Garibaldi, E. Garutti, G. Gavrilov, V. Gharibyan, A. Golendukhin, G. Graw, O. Grebeniouk, P. W. Green, L. G. Greeniaus, A. Gute, W. Haeberli, M. Hartig, D. Hasch, D. Heesbeen, F. H. Heinsius, M. Henoch, R. Hertenberger, W. H.A. Hesselink, P. Hoffmann-Rothe, G. Hofman, Y. Holler, R. J. Holt, B. Hommez, W. Hoprich, G. Iarygin, H. Ihssen, M. Iodice, A. Izotov, H. E. Jackson, A. Jgoun, R. Kaiser, J. Kanesaka, E. Kinney, A. Kisselev, P. Kitching, H. Kobayashi, N. Koch, K. Konigsmann, M. Kolstein, H. Kolster, V. Korotkov, E. Kotik, V. Kozlov, V. G. Krivokhijine, G. Kyle, L. Lagamba, A. Laziev, P. Lenisa, T. Lindemann, W. Lorenzon, N. C.R. Makins, J. W. Martin, H. Marukyan, F. Masoli, M. McAndrew, K. Mcllhany, R. D. McKeown, F. Meissner, F. Menden, A. Metz, N. Meyners, O. Mikloukho, C. A. Miller, R. Milner, V. Mitsyn, V. Muccifora, R. Mussa, A. Nagaitsev, E. Nappi, Y. Naryshkin, A. Nass, W. D. Nowak, T. G. O'Neill, R. Openshaw, J. Ouyang, B. R. Owen, S. F. Pate, S. Potashov, D. H. Potterveld, G. Rakness, R. Redwine, D. Reggiani, A. R. Reolon, R. Ristinen, K. Rith, D. Robinson, M. Ruh, D. Ryckbosch, Y. Sakemi, I. Savin, C. Scarlett, C. Schill, F. Schmidt, M. Schmitt, G. Schnell, K. P. Schüler, A. Schwind, J. Seibert, T. A. Shibata, T. Shin, C. Simani, A. Simon, K. Sinram, E. Steffens, J. J.M. Steijger, J. Stewart, U. Stösslein, K. Suetsugu, M. Sutter, H. Tallini, A. Terkulov, S. Tessarin, E. Thomas, B. Tipton, M. Tytgat, G. M. Urciuoli, J. F.J. van den Brand, G. van der Steenhoven, R. van de Vyver, J. J. van Hunen, M. C. Vetterli, V. Vikhrov, M. G. Vincter, J. Visser, E. Volk, C. Weiskopf, J. Wendland, J. Wilbert, T. Wise, K. Woller, S. Yoneyama, H. Zohrabian

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69 Citations (Scopus)

Abstract

Measurements of the cross section for exclusive virtual-photoproduction of ρ0 mesons from hydrogen are reported. The data were collected by the HERMES experiment using 27.5 GeV positrons incident on a hydrogen gas target in the HERA storage ring. The invariant mass W of the photon-nucleon system ranges from 4.0 to 6.0 GeV, while the negative squared four-momentum Q2 of the virtual photon varies from 0.7 to 5.0 GeV2. The present data together with most of the previous data in the intermediate W-domain are well described by a model that infers the W-dependence of the cross section from the dependence on the Bjorken scaling variable cursive Greek chi of the unpolarized structure function for deep-inelastic scattering. In addition, a model calculation based on Off-Forward Parton Distributions gives a fairly good account of the longitudinal component of the ρ0 production cross section for Q2 > 2 GeV2.

Original languageEnglish
Pages (from-to)389-398
Number of pages10
JournalEuropean Physical Journal C
Volume17
Issue number3
DOIs
Publication statusPublished - 2000

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Physics and Astronomy (miscellaneous)

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