Structure of light hypernuclei in the framework of Fermionic Molecular Dynamics

We performed variational calculations of the s-shell hypernuclei _Λ⁴H, _Λ⁴He and the p-shell hypernucleus _Λ⁷Li within a recently developed Fermionic Molecular Dynamics code. The YNG potentials considered in this work give substantially different Λ separation energies. Comparison of the Λ spectra of the mirror hypernuclei _Λ⁴H and _Λ⁴He reveals very small and mostly opposite charge symmetry breaking effect in contrast to experimental data, which indicates that more sophisticated interactions are required. In _Λ⁷Li, the Λ hyperon pulls the α and d clusters in the ⁶Li closer together, which confirms the 'glue-like' role of Λ. (author)