Range corrections for two-neutron halo nuclei in effective theory

Understand

The range corrections to the universal properties and structure of two-neutron halo nuclei are investigated within an effective quantum mechanics framework.

• Treating the nucleus as an effective three-body system, we make a systematic improvement upon previous calculations by calculating the linear range corrections at next-to-leading order.
• Since the effective ranges for the neutron-core interactions are not known, we estimate the effective range to be set by the inverse of the pion mass.
• We investigate the possibility of excited Efimov states in two-neutron halo nuclei and calculate their mean square radii to next-to-leading order.