Q² dependence of the S₁₁(1535) photocoupling and evidence for a P-wave resonance in η electroproduction

Denizli, H. et al. (2007) Q² dependence of the S₁₁(1535) photocoupling and evidence for a P-wave resonance in η electroproduction. Physical Review C, 76(1), 015204. (doi: 10.1103/PhysRevC.76.015204)

Abstract

New cross sections for the reaction ep→e′ηp are reported for total center-of-mass energy W=1.5-2.3 GeV and invariant squared momentum transfer Q²=0.13-3.3 GeV². This large kinematic range allows the extraction of new information about response functions, photocouplings, and ηN coupling strengths of baryon resonances. A sharp structure is seen at W~1.7 GeV. The shape of the differential cross section is indicative of the presence of a P-wave resonance that persists to high Q². Improved values are derived for the photocoupling amplitude for the S₁₁(1535) resonance. The new data greatly expand the Q² range covered, and an interpretation of all data with a consistent parametrization is provided.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Sokhan, Dr Daria and Watts, Dr Daniel and Protopopescu, Dr Dan and McKinnon, Dr Bryan and Livingston, Dr Kenneth and Ireland, Professor David and Kellie, Dr James and Rosner, Professor Guenther
• Authors: Denizli, H., Mueller, J., Dytman, S., Leber, M., Levine, R., Miles, J., Kim, K., Adams, G., Amaryan, M., Ambrozewicz, P., Anghinolfi, M., Asavapibhop, B., Asryan, G., Avakian, H., Bagdasaryan, H., Baillie, N., Ball, J., Baltzell, N., Barrow, S., Batourine, V., Battaglieri, M., Beard, K., Bedlinskiy, I., Bektasoglu, M., Bellis, M., Benmouna, N., Bianchi, N., Biselli, A., Bonner, B., Bouchigny, S., Boiarinov, S., Bradford, R., Branford, D., Briscoe, W., Brooks, W., Bültmann, S., Burkert, V., Butuceanu, C., Calarco, J., Careccia, S., Carman, D., Cetina, C., Chen, S., Cole, P., Coleman, A., Collins, P., Coltharp, P., Cords, D., Corvisiero, P., Crabb, D., Crede, V., Cummings, J., Dashyan, N., Vita, R., Sanctis, E., Degtyarenko, P., Dennis, L., Deur, A., Dhuga, K., Dickson, R., Djalali, C., Dodge, G., Donnelly, J., Doughty, D., Dragovitsch, P., Dugger, M., Dzyubak, O., Egiyan, H., Egiyan, K., Fassi, L., Elouadrhiri, L., Empl, A., Eugenio, P., Farhi, L., Fatemi, R., Fedotov, G., Feldman, G., Feuerbach, R., Forest, T., Frolov, V., Funsten, H., Gaff, S., Garçon, M., Gavalian, G., Gilfoyle, G., Giovanetti, K., Girard, P., Girod, F., Goetz, J., Gonenc, A., Gothe, R., Griffioen, K., Guidal, M., Guillo, M., Guler, N., Guo, L., Gyurjyan, V., Hafidi, K., Hakobyan, H., Hakobyan, R., Hardie, J., Heddle, D., Hersman, F., Hicks, K., Hleiqawi, I., Holtrop, M., Hu, J., Hyde-Wright, C., Ilieva, Y., Ireland, D., Ishkhanov, B., Isupov, E., Ito, M., Jenkins, D., Jo, H., Joo, K., Juengst, H., Kalantarians, N., Kelley, J., Kellie, J., Khandaker, M., Kim, K., Kim, W., Klein, A., Klein, F., Klusman, M., Kossov, M., Kramer, L., Kubarovsky, V., Kuhn, J., Kuhn, S., Kuleshov, S., Lachniet, J., Laget, J., Langheinrich, J., Lawrence, D., Livingston, K., Lu, H., Lukashin, K., MacCormick, M., Manak, J., Markov, N., McAleer, S., McKinnon, B., McNabb, J., Mecking, B., Mestayer, M., Meyer, C., Mibe, T., Mikhailov, K., Minehart, R., Mirazita, M., Miskimen, R., Mokeev, V., Moriya, K., Morrow, S., Moteabbed, M., Muccifora, V., Mutchler, G., Nadel-Turonski, P., Napolitano, J., Nasseripour, R., Nelson, S., Niccolai, S., Niculescu, G., Niculescu, I., Niczyporuk, B., Niroula, M., Niyazov, R., Nozar, M., O'Rielly, G., Osipenko, M., Ostrovidov, A., Park, K., Pasyuk, E., Paterson, C., Peterson, G., Philips, S., Pierce, J., Pivnyuk, N., Pocanic, D., Pogorelko, O., Polli, E., Pozdniakov, S., Preedom, B., Price, J., Prok, Y., Protopopescu, D., Qin, L., Raue, B., Riccardi, G., Ricco, G., Ripani, M., Ritchie, B., Ronchetti, F., Rosner, G., Rossi, P., Rowntree, D., Rubin, P., Sabatié, F., Sabourov, K., Salamanca, J., Salgado, C., Santoro, J., Sapunenko, V., Schumacher, R., Serov, V., Shafi, A., Sharabian, Y., Shaw, J., Shvedunov, N., Simionatto, S., Skabelin, A., Smith, E., Smith, L., Sober, D., Sokhan, D., Spraker, M., Stavinsky, A., Stepanyan, S., Stepanyan, S., Stokes, B., Stoler, P., Strakovsky, I., Strauch, S., Taiuti, M., Taylor, S., Tedeschi, D., Thoma, U., Thompson, R., Tkabladze, A., Tkachenko, S., Tur, C., Ungaro, M., Vineyard, M., Vlassov, A., Wang, K., Watts, D.P., Weinstein, L., Weller, H., Weygand, D., Williams, M., Wolin, E., Wood, M., Yegneswaran, A., Yun, J., Zana, L., Zhang, J., Zhao, B., and Zhao, Z.
• 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