Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: No-core configuration-interaction model for the isospin- and
  angular-momentum-projected states   [Background] Single-reference density functional theory is very successful in
reproducing bulk nuclear properties like binding energies, radii, or quadrupole
moments throughout the entire periodic table. Its extension to the
multi-reference level allows for restoring symmetries and, in turn, for
calculating transition rates.
  [Purpose] We propose a new no-core-configuration-interaction (NCCI) model
treating properly isospin and rotational symmetries. The model is applicable to
any nucleus irrespective of its mass and neutron- and proton-number parity. It
properly includes polarization effects caused by an interplay between the long-
and short-range forces acting in the atomic nucleus.
  [Methods] The method is based on solving the Hill-Wheeler-Griffin equation
within a model space built of linearly-dependent states having good angular
momentum and properly treated isobaric spin. The states are generated by means
of the isospin and angular-momentum projection applied to a set of low-lying
(multi)particle-(multi)hole deformed Slater determinants calculated using the
self-consistent Skyrme-Hartree-Fock approach.
  [Results] The theory is applied to calculate energy spectra in N~Z nuclei
that are relevant from the point of view of a study of superallowed Fermi
beta-decays. In particular, a new set of the isospin-symmetry-breaking
corrections to these decays is given.
  [Conclusions] It is demonstrated that the NCCI model is capable to capture
main features of low-lying energy spectra in light and medium-mass nuclei using
relatively small model space and without any local readjustment of its
low-energy coupling constants. Its flexibility and a range of applicability
makes it an interesting alternative to the conventional nuclear shell model.

30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph