Evidence for a backward peak in the γd → π⁰d cross section near the η threshold

Ilieva, Y. et al. (2010) Evidence for a backward peak in the γd → π⁰d cross section near the η threshold. European Physical Journal A, 43(3), pp. 261-267. (doi: 10.1140/epja/i2010-10918-x)

Abstract

High-quality cross sections for the reaction γd → π⁰ d have been measured using the CLAS at Jefferson Lab over a wide energy range near and above the η-meson photoproduction threshold. At backward c.m. angles for the outgoing pions, we observe a resonance-like structure near E_γ = 700 MeV. Our model analysis shows that it can be explained by η excitation in the intermediate state. The effect is the result of the contribution of the N(1535)S 11-resonance to the amplitudes of the subprocesses occurring between the two nucleons and of a two-step process in which the excitation of an intermediate η-meson dominates.

• 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 Kellie, Dr James and Rosner, Professor Guenther
• Authors: Ilieva, Y., Berman, B., Kudryavtsev, A., Strakovsky, I., Tarasov, V., Amarian, M., Ambrozewicz, P., Anghinolfi, M., Asryan, G., Avakian, H., Bagdasaryan, H., Baillie, N., Ball, J., Baltzell, N., Batourine, V., Battaglieri, M., Bedlinskiy, I., Bellis, M., Benmouna, N., Biselli, A., Bouchigny, S., Boiarinov, S., Bradford, R., Branford, D., Briscoe, W., Brooks, W., Bultmann, S., Burkert, V., Butuceanu, C., Calarco, J., Careccia, S., Carman, D., Chen, S., Cole, P., Collins, P., Coltharp, P., Crabb, D., Crede, V., De Masi, R., De Sanctis, E., De Vita, R., Degtyarenko, P., Deur, A., Dickson, R., Djalali, C., Dodge, G., Donnelly, J., Doughty, D., Dugger, M., Dzyubak, O., Egiyan, H., Egiyan, K., Elouadrhiri, L., Eugenio, P., Fedotov, G., Feldman, G., Funsten, H., Garcon, M., Gavalian, G., Gilfoyle, G., Giovanetti, K., Girod, F., Goetz, J., Gonenc, A., Gothe, R., Griffioen, K., Guidal, M., Guler, N., Guo, L., Gyurjyan, V., Hafidi, K., Hakobyan, R., Hersman, F., Hicks, K., Hleiqawi, I., Holtrop, M., Hyde-Wright, C., Ireland, D., Ishkhanov, B., Isupov, E., Ito, M., Jenkins, D., Jo, H., Joo, K., Juengst, H., Kalantarians, N., Kellie, J., Khandaker, M., Kim, W., Klein, A., Klein, F., Kossov, M., Krahn, Z., Kramer, L., Kubarovsky, V., Kuhn, J., Kuhn, S., Kuleshov, S., Lachniet, J., Laget, J., Langheinrich, J., Lawrence, D., Livingston, K., Lu, H., MacCormick, M., Markov, N., McKinnon, B., Mecking, B., Mestayer, M., Meyer, C., Mibe, T., Mikhailov, K., Mirazita, M., Miskimen, R., Mokeev, V., Moriya, K., Morrow, S., Moteabbed, M., Munevar, E., Mutchler, G., Nadel-Turonski, P., Nasseripour, R., Niccolai, S., Niculescu, G., Niculescu, I., Niczyporuk, B., Niroula, M., Niyazov, R., Nozar, M., Osipenko, M., Ostrovidov, A., Park, K., Pasyuk, E., Paterson, C., Pierce, J., Pivnyuk, N., Pogorelko, O., Pozdniakov, S., Price, J., Prok, Y., Protopopescu, D., Raue, B., Ricco, G., Ripani, M., Ritchie, B., Ronchetti, F., Rosner, G., Rossi, P., Sabatie, F., Salgado, C., Santoro, J., Sapunenko, V., Schumacher, R., Serov, V., Sharabian, Y., Shvedunov, N., Smith, E., Smith, L., Sober, D., Stavinsky, A., Stepanyan, S., Stepanyan, S., Stokes, B., Stoler, P., Strauch, S., Taiuti, M., Tedeschi, D., Thoma, U., Tkabladze, A., Tkachenko, S., Tur, C., Ungaro, M., Vineyard, M., Vlassov, A., Watts, D., Weinstein, L., Weygand, D., Williams, M., Wolin, E., Wood, M., Yegneswaran, A., Zana, L., Zhang, J., Zhao, B., and Zhao, Z.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: European Physical Journal A
• Publisher: Springer
• ISSN: 1434-6001
• ISSN (Online): 1434-601X
• Published Online: 03 February 2010