Backward-angle η photoproduction from protons at Eγ=1.6-2.4

M. Sumihama, D. S. Ahn, J. K. Ahn, H. Akimune, Y. Asano, W. C. Chang, S. Daté, H. Ejiri, H. Fujimura, M. Fujiwara, S. Fukui, S. Hasegawa, K. Hicks, T. Hotta, K. Imai, T. Ishikawa, T. Iwata, Y. Kato, H. Kawai, K. KinoH. Kohri, N. Kumagai, T. Matsuda, T. Matsumura, T. Mibe, M. Miyabe, N. Muramatsu, T. Nakano, M. Niiyama, M. Nomachi, Y. Ohashi, H. Ohkuma, T. Ooba, D. S. Oshuev, C. Rangacharyulu, A. Sakaguchi, P. M. Shagin, Y. Shiino, A. Shimizu, H. Shimizu, Y. Sugaya, Y. Toi, H. Toyokawa, A. Wakai, C. W. Wang, S. C. Wang, K. Yonehara, T. Yorita, M. Yoshimura, M. Yosoi, R. G.T. Zegers

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Differential cross sections for η photoproduction from protons have been measured at Eγ=1.6-2.4 GeV in the backward direction. A bump structure has been observed above 2.0 GeV in the total energy. No such bump is observed in η',ω, and π0 photoproductions. It is inferred that this unique structure in η photoproduction is due to a baryon resonance with a large ss̄ component that is strongly coupled to the ηN channel.

Original languageEnglish
Article number052201
JournalPhysical Review C - Nuclear Physics
Issue number5
Publication statusPublished - 2009 Nov 30

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Sumihama, M., Ahn, D. S., Ahn, J. K., Akimune, H., Asano, Y., Chang, W. C., Daté, S., Ejiri, H., Fujimura, H., Fujiwara, M., Fukui, S., Hasegawa, S., Hicks, K., Hotta, T., Imai, K., Ishikawa, T., Iwata, T., Kato, Y., Kawai, H., ... Zegers, R. G. T. (2009). Backward-angle η photoproduction from protons at Eγ=1.6-2.4. Physical Review C - Nuclear Physics, 80(5), [052201].