Electric properties of the Beryllium-11 system in Halo EFT

TL;DR

This paper applies Halo EFT to compute electromagnetic properties of Beryllium-11, achieving predictions consistent with experimental data and discussing higher-order corrections and neutron scattering insights.

Contribution

It introduces a Halo EFT approach to accurately predict Beryllium-11's electric properties and explores NLO corrections and neutron scattering data.

Findings

Agreement with experimental charge radii and B(E1) strengths

Predictions for Coulomb dissociation B(E1) strength

Insights into neutron-Be-10 scattering channels

Abstract

We compute E1 transitions and electric radii in the Beryllium-11 nucleus using an effective field theory that exploits the separation of scales in this halo system. We fix the leading-order parameters of the EFT from measured data on the 1/2+ and 1/2- levels in Be-11 and the B(E1) strength for the transition between them. We then obtain predictions for the B(E1) strength for Coulomb dissociation of the Be-11 nucleus to the continuum. We also compute the charge radii of the 1/2+ and 1/2- states. Agreement with experiment within the expected accuracy of a leading-order computation in this EFT is obtained. We also discuss how next-to-leading-order (NLO) corrections involving both s-wave and p-wave neutron-Be-10 interactions affect our results, and display the NLO predictions for quantities which are free of additional short-distance operators at this order. Information on neutron-Be-10 scattering in the relevant channels is inferred.