Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2007-12-12
Nucl.Phys.A803:210-226,2008
Physics
Nuclear Physics
Nuclear Theory
12 pages, 5 figures. Acknowledgments are added in the new version
Scientific paper
10.1016/j.nuclphysa.2008.02.219
Possible bound and resonant states of the hypernuclear systems $\Lambda nn$ and $\Lambda\Lambda n$ are sought as zeros of the corresponding three-body Jost functions calculated within the framework of the hyperspherical approach with local two-body S-wave potentials describing the $nn$, $\Lambda n$, and $\Lambda\Lambda$ interactions. Very wide near-threshold resonances are found for both three-body systems. The positions of these resonances turned out to be sensitive to the choice of the $\Lambda n$-potential. Bound $\Lambda nn$ and $\Lambda\Lambda n$ states only appear if the two-body potentials are multiplied by a factor of $\sim 1.5$.
Belyaev Vladimir B.
Rakityansky S. A.
Sandhas Werner
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