Discrete energy levels from truncated many-body calculations are inverted, via a Multiparameter Eigenvalue Problem emulator, into effective contact interactions that yield scattering phase shifts and resonance predictions.
Nucleon-$\alpha$ Scattering and Resonances in $^5$He and $^5$Li with JISP16 and Daejeon16 $NN$ interactions
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abstract
The SS-HORSE approach to analysis of resonant states is generalized to the case of charged particle scattering utilizing analytical properties of partial scattering amplitudes and applied to the study of resonant states in the $^{5}$Li nucleus and non-resonant $s$-wave proton-$\alpha$ scattering within the no-core shell model using the JISP16 and Daejeon16 $NN$ interactions. We present also the results of calculations of neutron-$\alpha$ scattering and resonances in the $^{5}$He nucleus with Daejeon16 and compare with results published previously using JISP16.
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Constructing Effective Interactions via Projection-Based Inversion
Discrete energy levels from truncated many-body calculations are inverted, via a Multiparameter Eigenvalue Problem emulator, into effective contact interactions that yield scattering phase shifts and resonance predictions.