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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 | 2011/07 |
| 形態種別 | 研究論文 |
| 査読 | 査読あり |
| 標題 | (K)over-barNN system with chiral dynamics |
| 執筆形態 | その他 |
| 掲載誌名 | PHYSICAL REVIEW C |
| 出版社・発行元 | AMER PHYSICAL SOC |
| 巻・号・頁 | 84(1),pp.015209-1-015209-9 |
| 著者・共著者 | M. Bayar,J. Yamagata-Sekihara,E. Oset |
| 概要 | We have performed a calculation of the scattering amplitude for the three-body system (K) over bar NN assuming (K) over bar scattering against a NN cluster using the fixed center approximation to the Faddeev equations. The (K) over bar N amplitudes, which we take from chiral unitary dynamics, govern the reaction and we find a (K) over bar NN amplitude that peaks around 40 MeV below the (K) over bar NN threshold, with a width in |T|(2) of the order of 50 MeV for spin 0 and has another peak around 27 MeV with similar width for spin 1. The results are in line with those obtained using different methods but implementing chiral dynamics. The simplicity of the approach allows one to see the important ingredients responsible for the results. In particular, we show the effects from the reduction of the size of the NN cluster due to the interaction with the (K) over bar and those from the explicit consideration of the pi Sigma N channel in the three-body equations. |
| DOI | 10.1103/PhysRevC.84.015209 |
| ISSN | 0556-2813 |