Separable Forces for $(d,p)$ Reactions in Momentum Space

TL;DR

This paper develops separable representations of neutron- and proton-nucleus interactions for $(d,p)$ reactions within a Faddeev-AGS framework, incorporating nuclear excitations via coupled-channel optical potentials.

Contribution

It introduces a method to derive coupled-channel separable optical potentials from phenomenological models for use in three-body reaction calculations.

Findings

Separable representations accurately reproduce phenomenological optical potentials.

Coupled-channel approach effectively includes nuclear excitations.

Framework facilitates more precise $(d,p)$ reaction modeling.

Abstract

Treating $(d,p)$ reactions in a Faddeev-AGS framework requires the interactions in the sub-systems as input. We derived separable representations for the neutron- and proton-nucleus interactions from phenomenological global optical potentials. In order to take into account excitations of the nucleus, excitations need to be included explicity, leading to a coupled-channel separable representation of the optical potential.