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arXiv 1809.08896nucl-thhep-phnucl-ex
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作为“$u u d s \bar{c}$五夸克态”的$\bar{K}\bar{D} N$分子态的三体计算

$\bar{K}\bar{D} N$ molecular state as a "$u u d s \bar{c}$ pentaquark" in a three-body calculation

Junko Yamagata-Sekihara, Takayasu Sekihara

摘要:

我们预言了一个新的三体强子分子,它由反K介子$\bar{K}$、反粲介子$\bar{D}$和核子$N$组成,自旋/宇称为$J^{P} = 1/2^{+}$,同位旋为$I = 1/2$ .这种状态表现得像一个显式的五夸克态,因为它的最小夸克组态是$u u d s \bar{c}$或$u d d s \bar{c}$。由于每对强子之间的相互吸引,特别是动态产生$D_{s 0} (2317)^{-}$的$\bar{K}\bar{D}$吸引和动态产生$Λ(1405)$的$\bar{K} N$吸引,使$\bar{K}\bar{D} N$系统受到束缚,在非相对论性的三体势模型中计算出其本征能为$3244 - 17 i$ MeV.我们讨论了这种$\bar{K} \bar{D} N$准束缚态在三体动力学中的独特性质。

英文摘要:

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 $Λ(1405)$, 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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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