Journal
NUCLEAR PHYSICS A
Volume 836, Issue 3-4, Pages 275-292Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nuclphysa.2010.02.014
Keywords
Halo nuclei; Effective field theory
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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. (C) 2010 Elsevier B.V. All rights reserved.
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