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Background: Existing bound-state-type calculations of three-neutron resonances yield contradicting results.Purpose: A direct study of the three-neutron continuum using rigorous scattering equations with realistic potentials and search for possible resonances is aimed.Methods: Faddeev-type integral equations for three-neutron transition operators are solved in the momentum-space partial-wave framework. The evolution of resonances is studied by enhancing the strength of the two-neutron interaction in partial waves with nonzero orbital momentum.Results: Calculated three-neutron transition operators exhibit resonant behavior for sufficiently large enhancement factors; pole trajectories in the complex energy plain are extracted from their energy dependence. However, the resonant behavior completely disappears for the physical interaction strength.Conclusions: There are no physically observable three-neutron resonant states consistent with presently accepted interaction models.
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A. Deltuva (2018) studied this question.
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