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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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| 発行・発表の年月 | 2016/06 |
| 形態種別 | 研究論文（国際会議プロシーディングス） |
| 査読 | 査読あり |
| 標題 | Compositeness of the $\Delta (1232)$ resonance in $\pi N$ scattering |
| 執筆形態 | その他 |
| 掲載誌名 | JPS conference proceedings |
| 巻・号・頁 | 未(未),未-未頁 |
| 著者・共著者 | T. Sekihara,T. Arai,J. Yamagata-Sekihara,S. Yasui |
| 概要 | We evaluate the $\pi N$ compositeness of the $\Delta (1232)$ resonance so as<br />
to clarify the internal structure of $\Delta (1232)$ in terms of the $\pi N$<br /> component. Here the compositeness is defined as contributions from two-body<br /> wave functions to the normalization of the total wave function and is extracted<br /> from the $\pi N$ scattering amplitude. In this study we employ the chiral<br /> unitary approach with the interaction up to the next-to-leading order plus a<br /> bare $\Delta$ term in chiral perturbation theory and describe $\Delta (1232)$<br /> in an elastic $\pi N$ scattering. Fitting the $\pi N$ scattering amplitude to<br /> the solution of the partial wave analysis, we obtain a large real part of the<br /> $\pi N$ compositeness for $\Delta (1232)$ comparable to unity and<br /> non-negligible imaginary part as well, with which we reconfirm the result in<br /> the previous study on the $\pi N$ compositeness for $\Delta (1232)$. |
| arXiv ID | arXiv:1510.08686 |
| PermalinkURL | http://arxiv.org/abs/1510.08686v1 |