Measurement of the polarized structure function σLT′ for p(e→,e′π+) n in the Δ(1232) resonance region

Joo, K. et al. (2004) Measurement of the polarized structure function σLT′ for p(e→,e′π+) n in the Δ(1232) resonance region. Physical Review C, 70(4), 042201(R). (doi: 10.1103/PhysRevC.70.042201)

Abstract

The polarized longitudinal-transverse structure function σ L T ′ has been measured using the p ( e → , e ′ π + ) n reaction in the Δ ( 1232 ) resonance region at Q 2 = 0.40 and 0.65 GeV 2 . No previous σ L T ′ data exist for this reaction channel. The kinematically complete experiment was performed at the Jefferson Lab with the CEBAF large acceptance spectrometer using longitudinally polarized electrons at an energy of 1.515 GeV . A partial-wave analysis of the data shows generally better agreement with recent phenomenological models of pion electroproduction compared to the previously measured π 0 p channel. A fit to both π 0 p and π + n channels using a unitary isobar model suggests the unitarized Born terms provide a consistent description of the nonresonant background. The t -channel pion pole term is important in the π 0 p channel through a rescattering correction, which could be model dependent.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Livingston, Dr Kenneth and Kellie, Dr James and Rosner, Professor Guenther and Protopopescu, Dr Dan and Ireland, Professor David
• Authors: Joo, K., Smith, L. C., Aznauryan, I. G., Burkert, V. D., Minehart, R., Adams, G., Ambrozewicz, P., Anciant, E., Anghinolfi, M., Asavapibhop, B., Asryan, G., Audit, G., Auger, T., Avakian, H., Bagdasaryan, H., Ball, J. P., Barrow, S., Batourine, V., Battaglieri, M., Beard, K., Bektasoglu, M., Benmouna, N., Bianchi, N., Biselli, A. S., Boiarinov, S., Bonner, B. E., Bouchigny, S., Bradford, R., Branford, D., Briscoe, W. J., Brooks, W. K., Bültmann, S., Butuceanu, C., Calarco, J. R., Carman, D. S., Carnahan, B., Cetina, C., Chen, S., Ciciani, L., Cole, P. L., Cords, D., Corvisiero, P., Crabb, D., Crannell, H., Cummings, J. P., De Sanctis, E., DeVita, R., Degtyarenko, P. V., Dennis, L., Deur, A., Dharmawardane, K. V., Dhuga, K. S., Djalali, C., Dodge, G. E., Doughty, D., Dragovitsch, P., Dugger, M., Dytman, S., Dzyubak, O. P., Egiyan, H., Egiyan, K. S., Elouadrhiri, L., Empl, A., Eugenio, P., Fersch, R., Feuerbach, R. J., Forest, T. A., Funsten, H., Gaff, S. J., Garçon, M., Gavalian, G., Gilad, S., Gilfoyle, G. P., Giovanetti, K. L., Gothe, R. W., Griffioen, K. A., Guidal, M., Guillo, M., Guler, N., Guo, L., Gyurjyan, V., Hadjidakis, C., Hakobyan, R. S., Hardie, J., Heddle, D., Hersman, F. W., Hicks, K., Hleiqawi, I., Holtrop, M., Hu, J., Hyde-Wright, C. E., Ilieva, Y., Ireland, D., Ito, M. M., Jenkins, D., Juengst, H. G., Kellie, J. D., Kelley, J. H., Khandaker, M., Kim, K. Y., Kim, K., Kim, W., Klein, A., Klein, F. J., Klimenko, A. V., Klusman, M., Kossov, M., Koubarovski, V., Kramer, L. H., Kuhn, S. E., Kuhn, J., Lachniet, J., Laget, J. M., Langheinrich, J., Lawrence, D., Lee, T., Livingston, K., Lukashin, K., Manak, J. J., Marchand, C., McAleer, S., McNabb, J. W. C., Mecking, B. A., Mestayer, M. D., Meyer, C. A., Mikhailov, K., Mirazita, M., Miskimen, R., Mokeev, V., Morand, L., Morrow, S. A., Muccifora, V., Mueller, J., Mutchler, G. S., Napolitano, J., Nasseripour, R., Nelson, S. O., Niccolai, S., Niculescu, G., Niculescu, I., Niczyporuk, B. B., Niyazov, R. A., Nozar, M., O’Rielly, G. V., Osipenko, M., Ostrovidov, A. I., Park, K., Pasyuk, E., Peterson, G., Philips, S. A., Pivnyuk, N., Pocanic, D., Pogorelko, O., Polli, E., Pozdniakov, S., Preedom, B. M., Price, J. W., Prok, Y., Protopopescu, D., Qin, L. M., Raue, B. A., Riccardi, G., Ricco, G., Ripani, M., Ritchie, B. G., Ronchetti, F., Rosner, G., Rossi, P., Rowntree, D., Rubin, P. D., Sabatié, F., Sabourov, K., Salgado, C., Santoro, J. P., Sapunenko, V., Schumacher, R. A., Serov, V. S., Sharabian, Y. G., Shaw, J., Simionatto, S., Skabelin, A. V., Smith, E. S., Sober, D. I., Spraker, M., Stavinsky, A., Stepanyan, S., Stepanyan, S. S., Stokes, B. E., Stoler, P., Strakovsky, I. I., Strauch, S., Taiuti, M., Taylor, S., Tedeschi, D. J., Thoma, U., Thompson, R., Tkabladze, A., Todor, L., Tur, C., Ungaro, M., Vineyard, M. F., Vlassov, A. V., Wang, K., Weinstein, L. B., Weller, H., Weygand, D. P., Williams, M., Wolin, E., Wood, M. H., Yegneswaran, A., Yun, J., and Zana, L.
• 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: 25 October 2004