|
新山 雅之 所属 京都産業大学 理学部 物理科学科 職種 教授 |
|
| 言語種別 | 英語 |
| 発行・発表の年月 | 2012/02 |
| 形態種別 | 研究論文 |
| 査読 | 査読あり |
| 標題 | Spin-Density Matrix Elements for gamma p -> K-*0 Sigma(+) at E-gamma=1.85-3.0 GeV with Evidence for the kappa(800) Meson Exchange |
| 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 | 108(9) |
| 著者・共著者 | S. H. Hwang,K. Hicks,J. K. Ahn,T. Nakano,D. S. Ahn,W. C. Chang,J. Y. Chen,S. Date,H. Ejiri,H. Fujimura,M. Fujiwara,S. Fukui,W. Gohn,T. Hotta,K. Imai,T. Ishikawa,K. Joo,Y. Kato,H. Kohri,Y. Kon,H. S. Lee,Y. Maeda,M. Miyabe,T. Mibe,Y. Morino,N. Muramatsu,Y. Nakatsugawa,M. Niiyama,H. Noumi,Y. Oh,Y. Ohashi,T. Ohta,M. Oka,J. Parker,C. Rangacharyulu,S. Y. Ryu,T. Sawada,Y. Sugaya,M. Sumihama,T. Tsunemi,M. Uchida,M. Ungaro,M. Yosoi |
| 概要 | The exclusive reaction gamma p -> K+pi(-)Sigma(+) was measured for the first time using linearly polarized photons at beam energies from 1.85 to 2.96 GeV. Angular distributions in the rest frame of the K+pi(-) system were fitted to extract spin-density matrix elements of the K-*0 decay. The measured parity spin asymmetry shows that natural-parity exchange is dominant in this reaction. This result clearly indicates the need for t-channel exchange of the kappa(800) scalar meson. |
| DOI | 10.1103/PhysRevLett.108.092001 |
| ISSN | 0031-9007 |