Electromagnetic form factors of one neutron halos with spin 1/2+ ground state

TL;DR

This paper calculates the electromagnetic form factors of single neutron halo nuclei Be-11, C-15, and C-19 using halo EFT, highlighting the dependence on neutron separation energy, scattering parameters, and two-body currents.

Contribution

It provides the first EFT-based calculations of these form factors at different orders, incorporating key physical parameters.

Findings

Form factors depend on neutron separation energy and scattering parameters.

Leading order results for C-15, next-to-leading for Be-11 and C-19.

Framework can be used for further theoretical and experimental studies.

Abstract

The electromagnetic form factors for single neutron halo nuclei Be-11, C-15 and C-19 are calculated. The calculations are performed in halo effective field theory (EFT) where the halo nuclei are approximated as made of a single neutron and a core. The form factors depend on the single neutron separation energy, the s-wave neutron-core scattering effective range and a two-body current. The EFT expressions are presented to leading order for C-15 and next-to-leading order for Be-11 and C-19.