Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Neutron-rich Helium isotopes based on hyperspherical harmonics   We present recent results for neutron-rich Helium isotopes obtained from the
hyperspherical harmonics method. Ground-state properties, like the binding
energy and the point-proton radius are shown for the two-neutron halo nucleus
6He using two-body low-momentum interactions derived from chiral forces. The
applicability of the method to the four-neutron halo nucleus 8He is discussed.
As an excited-state observable we present a recent calculation of the nuclear
electric polarizability of $^6$He from a semi-realistic potential. A comparison
of the calculated quantities to experimental data is performed.

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The categories of this paper are: physics
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The categories of this paper are: atom-ph
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The categories of this paper are: nlin
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The categories of this paper are: eess
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The categories of this paper are: q-fin
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The categories of this paper are: hep-lat
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The categories of this paper are: acc-phys
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The categories of this paper are: cond-mat
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The categories of this paper are: chao-dyn
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The categories of this paper are: cs
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The categories of this paper are: gr-qc
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The categories of this paper are: bayes-an
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The categories of this paper are: cmp-lg
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The categories of this paper are: comp-gas
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The categories of this paper are: chem-ph
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The categories of this paper are: solv-int