Evidence for a Narrow [Formula presented] Baryon Resonance in Photoproduction from the Neutron

T. Nakano, D. S. Ahn, J. K. Ahn, H. Akimune, Y. Asano, W. C. Chang, 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. Kohri, N. KumagaiS. Makino, T. Matsumura, N. Matsuoka, T. Mibe, 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, Hajime Shimizu, Y. Sugaya, M. Sumihama, 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

5 Citations (Scopus)


The [Formula presented] reaction on [Formula presented] has been studied by measuring both [Formula presented] and [Formula presented] at forward angles. A sharp baryon resonance peak was observed at [Formula presented] with a width smaller than [Formula presented] and a Gaussian significance of [Formula presented]. The strangeness quantum number ([Formula presented]) of the baryon resonance is [Formula presented]. It can be interpreted as a molecular meson-baryon resonance or alternatively as an exotic five-quark state ([Formula presented]) that decays into a [Formula presented] and a neutron. The resonance is consistent with the lowest member of an antidecuplet of baryons predicted by the chiral soliton model.

Original languageEnglish
JournalPhysical review letters
Issue number1
Publication statusPublished - 2003 Jul 3
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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