Range corrections for two-neutron halo nuclei in effective theory

Details Range corrections for two-neutron halo nuclei in effective theory Range corrections for two-neutron halo nuclei in effective theory

2009-11-17

arxiv.org/abs/0911.3238v2

Physics

Nuclear Physics

Nuclear Theory

19 pages, 4 eps figures, revtex4, final version to appear in Nucl. Phys. A

Scientific paper

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. We find that the effective range corrections are generally small and the leading order predictions are very robust.

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