The structure of 6He in the hyperspherical-harmonics approach

Details The structure of 6He in the hyperspherical-harmonics approach The structure of 6He in the hyperspherical-harmonics approach

2012-02-02

arxiv.org/abs/1202.0516v1

Physics

Nuclear Physics

Nuclear Theory

8 pages, 6 figures

Scientific paper

We present ab-initio calculations of the binding energy and radii of the two-neutron halo nucleus 6He using two-body low-momentum interactions based on chiral effective field theory potentials. Calculations are performed via a hyperspherical harmonics expansion where the convergence is sped up introducing an effective interaction for non-local potentials. The latter is essential to reach a satisfactory convergence of the extended matter radius and of the point-proton radius. The dependence of the results on the resolution scale is studied. A correlation is found between the radii and the two-neutron separation energy. The importance of three-nucleon forces is pointed out comparing our results and previous calculations to experiment.

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