The $α-α$ fishbone potential revisited

The fishbone potential of composite particles simulates the Pauli effect by nonlocal terms. We determine the $α-α$ fishbone potential by simultaneously fitting to two-$α$ resonance energies, experimental phase shifts and three-$α$ binding energies. We found that essentially a simple gaussian can provide a good description of two-$α$ and three-$α$ experimental data without invoking three-body potentials.

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