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新山 雅之 所属 京都産業大学 理学部 物理科学科 職種 教授 |
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| 言語種別 | 英語 |
| 発行・発表の年月 | 2003/07 |
| 形態種別 | 研究論文 |
| 査読 | 査読あり |
| 標題 | Evidence for a narrow S = +1 baryon resonance in photoproduction from the neutron |
| 執筆形態 | その他 |
| 掲載誌名 | PHYSICAL REVIEW LETTERS |
| 出版社・発行元 | AMER PHYSICAL SOC |
| 巻・号・頁 | 91(1) |
| 著者・共著者 | T Nakano,DS Ahn,JK Ahn,H Akimune,Y Asano,WC Chang,S Date,H Ejiri,H Fujimura,M Fujiwara,K Hicks,T Hotta,K Imai,T Ishikawa,T Iwata,H Kawai,ZY Kim,K Kino,H Kohri,N Kumagai,S 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,DS Oshuev,C Rangacharyulu,A Sakaguchi,T Sasaki,PM Shagin,Y Shiino,H Shimizu,Y Sugaya,M Sumihama,H Toyokawa,A Wakai,CW Wang,SC Wang,K Yonehara,T Yorita,M Yoshimura,M Yosoi,RGT Zegers |
| 概要 | The gamman-->K(+)K(-)n reaction on C-12 has been studied by measuring both K+ and K- at forward angles. A sharp baryon resonance peak was observed at 1.54+/-0.01 GeV/c(2) with a width smaller than 25 MeV/c(2) and a Gaussian significance of 4.6sigma. The strangeness quantum number (S) of the baryon resonance is +1. It can be interpreted as a molecular meson-baryon resonance or alternatively as an exotic five-quark state (uudd (s) over bar) that decays into a K+ and a neutron. The resonance is consistent with the lowest member of an antidecuplet of baryons predicted by the chiral soliton model. |
| DOI | 10.1103/PhysRevLett.91.012002 |
| ISSN | 0031-9007/1079-7114 |