{"paper":{"title":"Exclusive electroproduction of two pions at HERA","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A. Antonov, A.A. Savin, A. Bamberger, A. Bertolin, A. Bruni, A. Caldwell, A. Contin, A.D. Tapper, A.E. Nuncio-Quiroz, A. Eskreys, A.F. \\.Zarnecki, A. Galas, A. Garfagnini, A. Geiser, A.G. Yag\\\"ues-Molina, A. H\\\"uttmann, A. Keramidas, A. Kota\\'nski, A. Lee, A. Levy, A. Longhin, A. Margotti, A. Mastroberardino, A.M. Cooper-Sarkar, A. Montanari, A.N. Barakbaev, A. Nigro, A. Parenti, A. Pellegrino, A. Polini, A. Raval, A. Robertson, A. Salii, A. Solano, A. Spiridonov, A.S. Proskuryakov, A. Stern, A. Stifutkin, A.T. Doyle, A. Verbytskyi, A. Zichichi, B.A. Dolgoshein, B.B. Levchenko, B. Brzozowska, B. Bylsma, B. Foster, B. Kahle, B. L\\\"ohr, B. Musgrave, B.O. Zhautykov, B. Pawlik, B. Reisert, B.Y. Oh, C. Blohm, C.D. Catterall, C. Glasman, C. Gwenlan, C. Youngman, C. Zhou, D. Ashery, D. Bartsch, D. Boscherini, D. Bot, D. Dobur, D.D. Reeder, D. Gladkov, D. Hochman, D.H. Saxon, D. Kisielewska, D. Lontkovskyi, D. Notz, D. Son, D.S. Zotkin, D. Szuba, E. Brownson, E. Gallo, E.G. Boos, E. Gurvich, E. Hilger, E. Koffeman, E. Lobodzinska, E. Lohrmann, E. Paul, E. Tassi, F. Barreiro, F. Cindolo, F. Corriveau, F. Dal Corso, F. Januschek, F. Karstens, F. Mohamad Idris, F. Sciulli, G. Barbagli, G. Bari, G. Bruni, G. D'Agostini, G. Dolinska, G. Gach, G. Grigorescu, G. Grzelak, G. Hartner, G. Marini, G. Sartorelli, G. Susinno, G. Wolf, H. Hartmann, H. Kowalski, H. Perrey, H.-P. Jakob, H. Stadie, H. Tiecke, H. Wolfe, I. Abt, I.A. Korzhavina, I.-A. Melzer-Pellmann, I. Brock, Ie. Korol, I. Gialas, I. Grabowska-Bo{\\l}d, I. Gregor, I.I. Katkov, I. Kadenko, I. Makarenko, I.O. Skillicorn, I. Rubinsky, I. Singh, J. Behr, J.C. Hart, J. Chwastowski, J. Ciborowski, J. del Peso, J.D. Morris, J. Ferrando, J. Figiel, J.F. Martin, J. Grebenyuk, J.J. Whitmore, J. Maeda, J. Malka, J.M. Pawlak, J. Repond, J. Schwartz, J. Sztuk-Dambietz, J. Szuba, J. Terr\\'on, J. Tomaszewska, J.Y. Kim, K. Bondarenko, K. Borras, K. Horton, K. Mujkic, K. Nagano, K. Oliver, K. Olkiewicz, K. Papageorgiu, K. Piotrzkowski, K.R. Long, K. Tokushuku, K. Wrona, L. Adamczyk, L.A. Khein, L. Bellagamba, L. Cifarelli, L.K. Gladilin, L.M. Shcheglova, L.S. Durkin, L. Stanco, L. Suszycki, L. Wiggers, L. Zawiejski, M. Adamus, M. Arneodo, M. Basile, M. Bindi, M. Capua, M.C.K. Mattingly, M. Corradi, M. Costa, M. Derrick, M. Forrest, M. Guzik, M.I. Ferrero, M. Ishitsuka, M. J\\\"ungst, M. Kaur, M. Kuze, M. Lisovyi, M. Przybycie\\'n, M. Ruspa, M. Schioppa, M. Turcato, M. V\\'azquez, M. Wing, M. Wlasenko, M. Zolko, N. Bartosik, N. Br\\\"ummer, N. Coppola, N.N. Vlasov, N. Okazaki, N.S. Pokrovskiy, N. Zhmak, O. Bachynska, O. Behnke, O. Gogota, O. Gueta, O. Kuprash, O. Tomalak, O. Viazlo, O. Volynets, O.Yu. Lukina, O. Zenaiev, P. Antonioli, P.F. Ermolov, P. G\\\"ottlicher, P. G. Pelfer, P.J. Bussey, P. Kaur, P. Kooijman, P. Pluci\\'nski, P. Roloff, P. Schleper, P. Stopa, R. Aggarwal, R. Brugnera, R. Carlin, R.C.E. Devenish, R. Ciesielski, R. Hamatsu, R. Hori, R. Ingbir, R.J. Nowak, R.K. Dementiev, R. Klanner, R. Mankel, R. Nania, R. Sacchi, R. Shehzadi, R. Walczak, R. Yoshida, S. Antonelli, S. Bhadra, S. Chekanov, S. De Pasquale, S. Dusini, S. Fang, S. Fazio, S. Kananov, S. Kitamura, S. Limentani, S. Magill, S. Mergelmeyer, S. Miglioranzi, S. Schlenstedt, S. Shimizu, S. Suchkov, S. Yamada, T. Bo{\\l}d, T. Haas, T. Kanno, T. Namsoo, T. Nobe, T.P. Stewart, T. Sch\\\"orner-Sadenius, T. Theedt, T. Tsurugai, T. Tymieniecka, T.W. Jones, T.Y. Ling, U. Behrens, U. Karshon, U. Klein, U. K\\\"otz, U. Noor, U. Samson, U. Schneekloth, V. Aushev, V. Bokhonov, V. Drugakov, V. Libov, V. Monaco, V. Sch\\\"onberg, V. Sola, V. Sosnovtsev, W.A.T. Wan Abdullah, W.B. Schmidke, W. Hain, W.H. Smith, W. Lohmann, W. Perla\\'nski, W. S{\\l}omi\\'nski, W. Zeuner, Y. Aushev, Y.D. Ri, Y. Eisenberg, Y. Iga, Y. Ning, Yu.A. Golubkov, Yu. Onishchuk, Y. Yamazaki, Z.A. Ibrahim, ZEUS Collaboration: H. Abramowicz, Z. Ren, Z. Zolkapli","submitted_at":"2011-11-21T15:57:00Z","abstract_excerpt":"The exclusive electroproduction of two pions in the mass range 0.4 < M{\\pi}{\\pi} < 2.5 GeV has been studied with the ZEUS detector at HERA using an integrated luminosity of 82 pb-1. The analysis was carried out in the kinematic range of 2 < Q2 < 80 GeV2, 32 < W < 180 GeV and |t| < 0.6 GeV2, where Q2 is the photon virtuality, W is the photon-proton centre-of-mass energy and t is the squared four-momentum transfer at the proton vertex. The two-pion invariant-mass distribution is interpreted in terms of the pion electromagnetic form factor, |F(M{\\pi}{\\pi})|, assuming that the studied mass range i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1111.4905","kind":"arxiv","version":1},"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"}