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ヤマガタ ジュンコ
YAMAGATA JUNKO
山縣 淳子 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 | 2013/09 |
| 形態種別 | 研究論文 |
| 査読 | 査読あり |
| 標題 | Mesonic and non-mesonic branching ratios of K - absorption in the nuclear medium |
| 執筆形態 | その他 |
| 掲載誌名 | Nuclear Physics A |
| 巻・号・頁 | 914,pp.338-343 |
| 著者・共著者 | Takayasu Sekihara,Junko Yamagata-Sekihara,Daisuke Jido,Yoshiko Kanada-En'yo |
| 概要 | The branching ratios of K - absorption at rest in nuclear matter are evaluated from the K - self-energy by using the chiral unitary approach for the s-wave K-N amplitude. We find that both the mesonic and non-mesonic absorption potentials are dominated by the Λ(1405) contributions. We also observe that the mesonic absorption ratio [π -σ +]/[π +σ -] increases as a function of nuclear density due to the interference between Λ(1405) and the I = 1 non-resonant background, which is consistent with experimental results. The fraction of the non-mesonic absorption is evaluated to be about 30% at the saturation density. The branching ratios of the K - absorption at rest into deuteron and 4He are also calculated. © 2013 Elsevier B.V. |
| DOI | 10.1016/j.nuclphysa.2013.02.002 |
| ISSN | 0375-9474 |
| arXiv ID | arXiv:1212.4951 |
| PermalinkURL | http://arxiv.org/abs/1212.4951v2 |