{"paper":{"title":"Ratios of Helicity Amplitudes for Exclusive rho-0 Electroproduction","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A. Avetissian, A. Borissov, A. Fantoni, A. Hillenbrand, A. Ivanilov, A. Kisselev, A. Lopez Ruiz, A. Martinez de la Ossa, A. Movsisyan, A. Mussgiller, A. Nass, A. Rostomyan, A.R. Reolon, A. Schaefer, A. Terkulov, A. Trzcinski, A. Vandenbroucke, B. Marianski, B.-Q. Ma, B. Seitz, B. Zihlmann, C.A. Miller, C. Hadjidakis, C. Riedl, C. Van Hulse, D. Gabbert, D. Hasch, D. Mahon, D. Ryckbosch, D. Veretennikov, E. Avetisyan, E.C. Aschenauer, E. Cisbani, E. De Sanctis, E. Kinney, E. Nappi, E. Steffens, F. Ellinghaus, F. Garibaldi, F. Giordano, F. Sanftl, F. Stinzing, G. Ciullo, G. Elbakian, G. Gapienko, G. Gavrilov, G. Hill, G. Karyan, G.P. Capitani, G. Rosner, G. Schnell, H.E. Jackson, H. Marukyan, H.P. Blok, H.S. Jo, I. Hristova, I. Lehmann, I. Vilardi, J. Bowles, J. Burns, J.J.M. Steijger, J. Rubin, K.P. Schueler, K. Rith, L.A. Linden-Levy, L. De Nardo, L. Felawka, L. Lagamba, L. Lapikas, L.L. Pappalardo, L. Manfre, M. Capiluppi, M. Contalbrigo, M. Diefenthaler, M. Dueren, M. Ehrenfried, M. Golembiovskaya, M. Hartig, M. Hoek, M. Murray, M. Negodaev, M. Stancari, M. Statera, M. Tytgat, N. Akopov, N. Bianchi, N.C.R. Makins, N. Kobayashi, N. Pickert, P. Di Nezza, P.E. Reimer, P.F. Dalpiaz, P. Kravchenko, P. Lenisa, P. Zupranski, R. Avakian, R. De Leo, R. Fabbri, R. Kaiser, R. Lamb, R. Perez-Benito, S. Belostotski, S. Frullani, S. Gliske, S.I. Manaenkov, S. Joosten, S. Taroian, S. Wang, S. Yaschenko, S. Yen, T.-A. Shibata, The HERMES Collaboration: A. Airapetian, T. Keri, V. Bryzgalov, V. Gapienko, V. Gharibyan, V.G. Krivokhijine, V. Korotkov, V. Kozlov, V. Muccifora, V. Shutov, V. Vikhrov, W. Augustyniak, W. Deconinck, W.-D. Nowak, W. Lorenzon, W. Yu, X.-G. Lu, X.-R. Lu, Y. Holler, Y. Imazu, Y. Mao, Y. Miyachi, Y. Naryshkin, Y. Salomatin, Y. Van Haarlem, Z. Akopov","submitted_at":"2010-12-16T17:04:15Z","abstract_excerpt":"Exclusive rho^0-meson electroproduction is studied in the HERMES experiment, using a 27.6 GeV longitudinally polarized electron/positron beam and unpolarized hydrogen and deuterium targets in the kinematic region 0.5 GeV^2 < Q^2 < 7.0 GeV^2, 3.0 GeV < W < 6.3 GeV, and -t' < 0.4 GeV^2. Real and imaginary parts of the ratios of the natural-parity-exchange helicity amplitudes T_{11} (\\gamma^*_T --> \\rho_T), T_{01} (\\gamma^*_T --> \\rho_L), T_{10} (\\gamma^*_L --> \\rho_T), and T_{1-1} (\\gamma^*_{-T} -->\\rho_T) to T_{00} (\\gamma^*_L --> \\rho_L) are extracted from the data. For the unnatural-parity-ex"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1012.3676","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}