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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 | 2016/03 |
| 形態種別 | 研究論文 |
| 査読 | 査読あり |
| 標題 | Compositeness of baryonic resonances: Application to the Delta(1232), N(1535), and N(1650) resonances |
| 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 | 93(3),pp.035204-1-035204-22 |
| 著者・共著者 | Takayasu Sekihara,Takashi Arai,Junko Yamagata-Sekihara,Shigehiro Yasui |
| 概要 | We present a formulation of the compositeness for baryonic resonances to discuss the meson-baryon molecular structure inside the resonances. For this purpose, we derive a relation between the residue of the scattering amplitude at the resonance pole position and the two-body wave function of the resonance in a sophisticated way, and we define the compositeness as the norm of the two-body wave functions. As applications, we investigate the compositeness of the Delta(1232), N(1535), and N(1650) resonances from precise pi N scattering amplitudes in a unitarized chiral framework with the interaction up to the next-to-leading order in chiral perturbation theory. The pi N compositeness for the Delta(1232) resonance is evaluated in the pi N single-channel scattering, and we find that the pi N component inside Delta(1232) in the present framework is non-negligible, which supports the previous work. On the other hand, the compositeness for the N(1535) and N(1650) resonances is evaluated in a coupled-channel approach, resulting that the pi N, eta N, K Lambda, and K Sigma components are negligible for these resonances. |
| DOI | 10.1103/PhysRevC.93.035204 |
| ISSN | 2469-9985/2469-9993 |