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 言語種別 英語 発行・発表の年月 2018/09/24 形態種別 研究論文 査読 査読あり 標題 $\bar{K}\bar{D} N$ molecular state as a "$u u d s \bar{c}$ pentaquark" in a three-body calculation 執筆形態 その他 掲載誌名 Physical Review C 巻・号・頁 100(015203) 著者・共著者 Junko Yamagata-Sekihara,Takayasu Sekihara 概要 We predict a new three-body hadronic molecule composed of antikaon $\bar{K}$, anticharm meson $\bar{D}$, and nucleon $N$ with spin/parity $J^{P} = 1/2^{+}$ and isospin $I = 1/2$. This state behaves like an explicit pentaquark state because its minimal quark configuration is $u u d s \bar{c}$ or $u d d s \bar{c}$. Owing to the attraction between every pair of two hadrons, in particular the $\bar{K}\bar{D}$ attraction which dynamically generates $D_{s 0} (2317)^{-}$ and $\bar{K} N$ attraction which dynamically generates $\Lambda (1405)$, the $\bar{K}\bar{D} N$ system is bound, and its eigenenergy is calculated as $3244 - 17 i$ MeV in a nonrelativistic three-body potential model. We discuss properties of this $\bar{K} \bar{D} N$ quasibound state which emerge uniquely in three-body dynamics. DOI 10.1103/PhysRevC.100.015203 arXiv ID arXiv:1809.08896