Near-threshold diffractive I-Meson photoproduction from the proton

T. Mibe, W. C. Chang, T. Nakano, D. S. Ahn, J. K. Ahn, H. Akimune, Y. Asano, S. Daté, H. Ejiri, H. Fujimura, M. Fujiwara, K. Hicks, T. Hotta, K. Imai, T. Ishikawa, T. Iwata, H. Kawai, Z. Y. Kim, K. Kino, H. KohriN. Kumagai, S. Makino, T. Matsuda, T. Matsumura, N. Matsuoka, K. Miwa, M. Miyabe, Y. Miyachi, M. Morita, N. Muramatsu, M. Niiyama, M. Nomachi, Y. Ohashi, T. Ooba, H. Ohkuma, D. S. Oshuev, C. Rangacharyulu, A. Sakaguchi, T. Sasaki, P. M. Shagin, Y. Shiino, H. Shimizu, Y. Sugaya, M. Sumihama, A. I. Titov, Y. Toi, H. Toyokawa, A. Wakai, C. W. Wang, S. C. Wang, K. Yonehara, T. Yorita, M. Yoshimura, M. Yosoi, R. G.T. Zegers

Research output: Contribution to journalArticlepeer-review

116 Citations (Scopus)


Photoproduction of a I meson on protons was studied by means of linearly polarized photons at forward angles in the low-energy region from threshold to Eγ=2.37GeV. The differential cross sections at t=-|t|min do not increase smoothly as Eγ increases but show a local maximum at around 2.0 GeV. The angular distributions demonstrate that I mesons are photoproduced predominantly by helicity-conserving processes, and the local maximum is not likely due to unnatural-parity processes.

Original languageEnglish
Article number182001
JournalPhysical Review Letters
Issue number18
Publication statusPublished - 2005 Oct 28


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