Electroproduction of pπ+​π- Off Protons at 0.2 < Q² < 0.6 GeV² and 1.3 < W < 1.57 GeV with the CLAS Detector

Authors

G. V. Fedotov
Gerard P. Gilfoyle, University of RichmondFollow
et. al.

DOI

10.1103/PhysRevC.79.015204

Abstract

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.

Document Type

Article

Publication Date

1-20-2009

Publisher Statement

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.

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Recommended Citation

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.