anti-K anti-K N molecule state in three-body calculation

Abstract

A $\bar{K}\bar{K}N$ system with $I=1/2$ and $J^P=1/2^{+}$ is investigated with non-relativistic three-body calculations by using effective $\bar{K}N$ and $\bar{K}\bar{K}$ interactions. The present investigation suggests that a weakly bound state for the $\bar{K}\bar{K}N$ system can be formed below the two-body threshold of $\bar{K}$ and quasibound $\bar{K}N$ with a $40\sim 60$ MeV decay width of $\bar{K}\bar{K}N\to \pi Y\bar{K}$. This corresponds to an excited $\Xi$ baryon with $J^P=1/2^{+}$ located around 1.9 GeV. Studying the wave function of the $\bar{K}\bar{K}N$ system obtained in this formulation, we find that the three-body bound system has a characteristic structure of $\bar{K}N$+$\bar{K}$ cluster with spatial extent.

submitted to Physical Review C

References in corpus (8)

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Cited by in corpus (1)

• K anti-K N molecule state with I=1/2 and J^P=1/2^+ studied with three-body calculation