Exclusive leptoproduction of p(0) mesons from hydrogen at intermediate virtual photon energies

Authors
Airapetian, A Akopov, N Akushevich, I Amarian, M Arrington, J Aschenauer, EC Avakian, H Avakian, R Avetissian, A Avetissian, E Bailey, P Bains, B Baumgarten, C Beckmann, M Belostotski, S Bernreuther, S Bianchi, N Bottcher, H Borissov, A Bouwhuis, M Brack, J Brauksiepe, S Braun, B Bruckner, W Brull, A Budz, P Bulten, HJ Capitani, GP Carter, P Chumney, P Cisbani, E Court, GR Dalpiaz, PF De Leo, R De Nardo, L De Sanctis, E De Schepper, D Devitsin, E Huberts, PKAD Di Nezza, P Djordjadze, V Duren, M Dvoredsky, A Elbakian, G Ely, J Fantoni, A Fechtchenko, A Ferro-Luzzi, M Fiedler, K Filippone, BW Fischer, H Fox, B Franz, J Frullani, S Garber, Y Garibaldi, F Garutti, E Gavrilov, G Gharibyan, V Golendukhin, A Graw, G Grebeniouk, O Green, PW Greeniaus, LG Gute, A Haeberli, W Hartig, M Hasch, D Heesbeen, D Heinsius, FH Henoch, M Hertenberger, R Hesselink, WHA Hoffmann-Rothe, P Hofman, G Holler, Y Holt, RJ Hommez, B Hoprich, W Iarygin, G Ihssen, H Iodice, M Izotov, A Jackson, HE Jgoun, A Kaiser, R Kanesaka, J Kinney, E Kisselev, A Kitching, P Kobayashi, H Koch, N Konigsmann, K Kolstein, M Kolster, H Korotkov, V Kotik, E Kozlov, V Krivokhijine, VG Kyle, G Lagamba, L Laziev, A Lenisa, P Lindemann, T Lorenzon, W Makins, NCR Martin, JW Marukyan, H Masoli, F McAndrew, M McIlhany, K McKeown, RD Meissner, F Menden, F Metz, A Meyners, N Mikloukho, O Miller, CA Milner, R Mitsyn, V Muccifora, V Mussa, R Nagaitsev, A Nappi, E Naryshkin, Y Nass, A Nowak, WD O'Neill, TG Openshaw, R Ouyang, J Owen, BR Pate, SF Potashov, S Potterveld, DH Rakness, G Redwine, R Reggiani, D Reolon, AR Ristinen, R Rith, K Robinson, D Ruh, M Ryckbosch, D Sakemi, Y Sevin, I Scarlett, C Schill, C Schmidt, F Schmitt, M Schnell, G Schuler, KP Schwind, A Seibert, J Shibata, TA Shin, T Shutov, V Simani, C Simon, A Sinram, K Steffens, E Steijger, JJM Stewart, J Stosslein, U Suetsugu, K Sutter, M Tallini, H Taroian, S Terkulov, A Tessarin, S Thomas, E Tipton, B Tytgat, M Urciuoli, GM van den Brand, JFJ van der Steenhoven, G van de Vyver, R van Hunen, JJ Vetterli, MC Vikhrov, V Vincter, MG Visser, J Volk, E Weiskopf, C Wendland, J Wilbert, J Wise, T Woller, K Yoneyama, S Zohrabian, H
Citation
A. Airapetian et al., Exclusive leptoproduction of p(0) mesons from hydrogen at intermediate virtual photon energies, EUR PHY J C, 17(3), 2000, pp. 389-398
Citations number
39
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
EUROPEAN PHYSICAL JOURNAL C
ISSN journal
1434-6044 → ACNP
Volume
17
Issue
3
Year of publication
2000
Pages
389 - 398
Database
ISI
SICI code
1434-6044(200011)17:3<389:ELOPMF>2.0.ZU;2-1
Abstract
Measurements of the cross section for exclusive virtual-photoproduction of rho (0) mesons from hydrogen are reported. The data were collected by the H ERMES 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 syste m ranges from 4.0 to 6.0 GeV, while the negative squared four-momentum Q(2) Of the virtual photon varies from 0.7 to 5.0 GeV2. The present data togeth er with roost of the previous data in the intermediate W-domain are well de scribed by a model that infers the W-dependence of the cross section from t he dependence on the Bjorken scaling variables of the unpolarized structure function for deep-inelastic scattering. In addition, a model calculation b ased on OR-Forward Parton Distributions gives a fairly good account of the longitudinal component of the rho (0) production cross section for Q(2) > 2 GeV2.