Electroproduction of pπ+π− off protons at 0.2<Q²<0.6 GeV² and 1.3<W<1.57 GeV with the CLAS detector

Fedotov, G. et al. (2009) 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(1), 015204. (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.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Protopopescu, Dr Dan and McKinnon, Dr Bryan and Livingston, Dr Kenneth and Ireland, Professor David and Hassall, Mr Neil and Kellie, Dr James and Rosner, Professor Guenther
• Authors: Fedotov, G., Mokeev, V., Burkert, V., Elouadrhiri, L., Golovatch, E., Ishkhanov, B., Isupov, E., Shvedunov, N., Adams, G., Amaryan, M., Ambrozewicz, P., Anghinolfi, M., Asavapibhop, B., Asryan, G., Avakian, H., Baghdasaryan, H., Baillie, N., Ball, J., Baltzell, N., Batourine, V., Battaglieri, M., Bedlinskiy, I., Bektasoglu, M., Bellis, M., Benmouna, N., Biselli, A., Bonner, B., Bouchigny, S., Boiarinov, S., Bradford, R., Branford, D., Brooks, W., Bultmann, S., Butuceanu, C., Calarco, J., Careccia, S., Carman, D., Carnahan, B., Chen, S., Cole, P., Coltharp, P., Corvisiero, P., Crabb, D., Crannell, H., Crede, V., Cummings, J., Dashyan, N., De Sanctis, E., De Vita, R., Degtyarenko, P., Denizli, H., Dennis, L., Dharmawardane, K., Dickson, R., Djalali, C., Dodge, G., Donnelly, J., Doughty, D., Dugger, M., Dytman, S., Dzyubak, O., Egiyan, H., Egiyan, K., Eugenio, P., Fatemi, R., Feuerbach, R., Forest, T., Funsten, H., Gavalian, G., Gevorgyan, N., Gilfoyle, G., Giovanetti, K., Girod, F., Goetz, J., Gothe, R., Griffioen, K., Guidal, M., Guillo, M., Guler, N., Guo, L., Gyurjyan, V., Hadjidakis, C., Hardie, J., Hassall, N., Hersman, F., Hicks, K., Hleiqawi, I., Holtrop, M., Hu, J., Huertas, M., Hyde, C., Ilieva, Y., Ireland, D., Ito, M., Jenkins, D., Jo, H., Joo, K., Juengst, H., Kellie, J., Khandaker, M., Kim, K., Kim, K., Kim, W., Klein, A., Klein, F., Klimenko, A., Klusman, M., Krahn, Z., Kramer, L., Kubarovsky, V., Kuhn, J., Kuhn, S., Kuleshov, S., Lachniet, J., Laget, J., Langheinrich, J., Lawrence, D., Lee, T., Livingston, K., Markov, N., McCracken, M., McKinnon, B., McNabb, J., Mecking, B., Mestayer, M., Meyer, C., Mibe, T., Mikhailov, K., Mineeva, T., Minehart, R., Mirazita, M., Miskimen, R., Moriya, K., Morrow, S., Mueller, J., Mutchler, G., Nadel-Turonski, P., Nasseripour, R., Niccolai, S., Niculescu, G., Niculescu, I., Niczyporuk, B., Niyazov, R., O'Rielly, G., Osipenko, M., Ostrovidov, A., Park, K., Pasyuk, E., Paterson, C., Pierce, J., Pivnyuk, N., Pocanic, D., Pogorelko, O., Pozdniakov, S., Price, J., Prok, Y., Protopopescu, D., Raue, B., Ricco, G., Ripani, M., Ritchie, B., Rosner, G., Rossi, P., Rowntree, D., Rubin, P., Sabatie, F., Salgado, C., Santoro, J., Sapunenko, V., Schumacher, R., Serov, V., Sharabian, Y., Sharov, D., Shaw, J., Smith, E., Smith, L., Sober, D., Stavinsky, A., Stepanyan, S., Stokes, B., Stoler, P., Stopani, K., Strauch, S., Taiuti, M., Taylor, S., Tedeschi, D., Thompson, R., Tkabladze, A., Tkachenko, S., Todor, L., Tur, C., Ungaro, M., Vineyard, M., Vlassov, A., Weinstein, L., Weygand, D., Williams, M., Wolin, E., Wood, M., Yegneswaran, A., Zana, L., and Zhang, J.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Physical Review C
• Publisher: American Physical Society
• ISSN: 0556-2813
• ISSN (Online): 1089-490X
• Published Online: 20 January 2009