Probing nucleon-nucleon interactions in breakup of a one-neutron halo $^{11}$Be on a proton target

TL;DR

This paper compares advanced theoretical models for the breakup of the halo nucleus $^{11}$Be on a proton target, analyzing the sensitivity of the results to nucleon-nucleon interactions and highlighting unresolved issues in modeling such exotic systems.

Contribution

It provides a detailed comparison between Faddeev/AGS and CDCC calculations for $^{11}$Be breakup, emphasizing the impact of nucleon-nucleon potential choices.

Findings

Results are sensitive to nucleon-nucleon potential inputs.

Current models do not fully resolve the scattering puzzle for halo nuclei.

The study highlights limitations in existing few-body approaches.

Abstract

A comparison between full few-body Faddeev/Alt-Grassberger-Sandhas (Faddeev/AGS) and continuum-discretized coupled channels (CDCC) calculations is made for the resonant and nonresonant breakup of $^{11}$Be on proton target at 63.7 MeV/u incident energy. A simplified two-body model is used for $^{11}$Be which involves an inert $^{10}$Be(0$^+$) core and a valence neutron. The sensitivity of the calculated observables to the nucleon-nucleon potential dynamical input is analysed. We show that with the present NN and N-core dynamics the results remain a puzzle for the few-body problem of scattering from light exotic halo nuclei.