Source: https://scholarship.richmond.edu/physics-faculty-publications/82/
Timestamp: 2019-04-20 04:40:00+00:00

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This paper reports on the most comprehensive data set obtained on differential and fully integrated cross sections for the process ep → e'pπ+π −. The data were collected with the CLAS detector at Jefferson Laboratory. Measurements were carried out in the as yet unexplored kinematic region of photon virtuality 0.2 < Q2 < 0.6 GeV2 and invariant mass of the final hadron system W from 1.3 to 1.57 GeV. For the first time, nine independent one-fold differential cross sections were determined in each bin of W and Q2 covered by the measurements. A phenomenological analysis of the data allowed us to establish the most significant mechanisms contributing to the reaction. The nonresonant mechanisms account for a major part of cross sections. However, we find sensitivity to s-channel excitations of low-mass nucleon resonances, especially to the N(1440)P11 and N(1520)D13 states in kinematic dependencies of the one-fold differential cross sections.
Copyright © 2009 American Physical Society. This article first appeared in Physical Review C 79, no. 1 (January 20, 2009): 015204-1-15204-23. doi:10.1103/PhysRevC.79.015204.
Fedotov, G. V., V. I. Mokeev, V. D. Burkert, L. Elouadrhiri, E. N. Golovatch, B. S. Ishkhanov, E. L. Isupov, N. V. Shvedunov, G. Adams, M. J. Amaryan, P. Ambrozewicz, M. Anghinolfi, B. Asavapibhop, G. Asryan, H. Avakian, H. Baghdasaryan, N. Baillie, J. P. Ball, N. A. Baltzell, V. Batourine, M. Battaglieri, I. Bedlinskiy, M. Bektasoglu, M. Bellis, N. Benmouna, A. S. Biselli, B. E. Bonner, S. Bouchigny, S. Boiarinov, R. Bradford, D. Branford, W. K. Brooks, S. Bültmann, C. Butuceanu, J. R. Calarco, S. L. Careccia, D. S. Carman, B. Carnahan, S. Chen, P. L. Cole, P. Coltharp, P. Corvisiero, D. Crabb, H. Crannell, V. Crede, J. P. Cummings, N. B. Dashyan, E. De Sanctis, R. De Vita, P. V. Degtyarenko, H. Denizli, L. Dennis, K. V. Dharmawardane, R. Dickson, C. Djalali, G. E. Dodge, J. Donnelly, D. Doughty, M. Dugger, S. Dytman, O. P. Dzyubak, H. Egiyan, K. S. Egiyan, P. Eugenio, R. Fatemi, R. J. Feuerbach, T. A. Forest, H. Funsten, G. Gavalian, N. G. Gevorgyan, G. P. Gilfoyle, K. L. Giovanetti, F. X. Girod, J. T. Goetz, R. W. Gothe, K. A. Griffioen, M. Guidal, M. Guillo, N. Guler, L. Guo, V. Gyurjyan, C. Hadjidakis, J. Hardie, N. Hassall, F. W. Hersman, K. Hicks, I. Hleiqawi, M. Holtrop, J. Hu, M. Huertas, C. E. Hyde, Y. Ilieva, D. G. Ireland, M. M. Ito, D. Jenkins, H. S. Jo, K. Joo, H. G. Juengst, J. D. Kellie, M. Khandaker, K. Y. Kim, K. Kim, W. Kim, A. Klein, F. J. Klein, A. Klimenko, M. Klusman, Z. Krahn, L. H. Kramer, V. Kubarovsky, J. Kuhn, S. E. Kuhn, S. Kuleshov, J. Lachniet, J. M. Laget, J. Langheinrich, D. Lawrence, T. Lee, K. Livingston, N. Markov, M. McCracken, B. McKinnon, J. W. C. McNabb, B. A. Mecking, M. D. Mestayer, C. A. Meyer, T. Mibe, K. Mikhailov, T. Mineeva, R. Minehart, M. Mirazita, R. Miskimen, K. Moriya, S. A. Morrow, J. Mueller, G. S. Mutchler, P. Nadel-Turonski, R. Nasseripour, S. Niccolai, G. Niculescu, I. Niculescu, B. B. Niczyporuk, R. A. Niyazov, G. V. O'rielly, M. Osipenko, A. I. Ostrovidov, K. Park, E. Pasyuk, C. Paterson, J. Pierce, N. Pivnyuk, D. Pocanic, O. Pogorelko, S. Pozdniakov, J. W. Price, Y. Prok, D. Protopopescu, B. A. Raue, G. Ricco, M. Ripani, B. G. Ritchie, G. Rosner, P. Rossi, D. Rowntree, P. D. Rubin, F. Sabatié, C. Salgado, J. P. Santoro, V. Sapunenko, R. A. Schumacher, V. S. Serov, Y. G. Sharabian, D. Sharov, J. Shaw, E. S. Smith, L. C. Smith, D. I. Sober, A. Stavinsky, S. Stepanyan, B. E. Stokes, P. Stoler, K. Stopani, S. Strauch, M. Taiuti, S. Taylor, D. J. Tedeschi, R. Thompson, A. Tkabladze, S. Tkachenko, L. Todor, C. Tur, M. Ungaro, M. F. Vineyard, A. V. Vlassov, L. B. Weinstein, D. P. Weygand, M. Williams, E. Wolin, M. H. Wood, A. Yegneswaran, L. Zana, and J. Zhang. "Electroproduction of pπ+π- Off Protons at 0.2 < Q2 < 0.6 GeV2 and 1.3 < W < 1.57 GeV with the CLAS detector." Physical Review C 79, no. 1 (January 20, 2009): 015204-1-15204-23. doi:10.1103/PhysRevC.79.015204.

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