Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nuclear multipole responses from chiral effective field theory
  interaction   We probe nuclear multipole resonances in the framework of the random-phase
approximation by using the interaction obtained from the chiral effective field
theory. The three-nucleon force is included in a form of the in-medium
two-nucleon interaction which was derived from the chiral three-nucleon force.
The isoscalar monopole, isoscalar dipole, isovector dipole and isoscalar
quadrupole resonances of the closed-shell $^{56,68,78}$Ni have been
investigated. The calculations reasonably reproduce the experimental multipole
resonances of $^{56,68}$Ni, and well describe the pygmy dipole resonance and
dipole polarizability measured in $^{68}$Ni. The multipole resonances of
$^{78}$Ni, including pygmy dipole resonance and dipole polarizability, are
predicted. The detailed effects of the tensor force and three-body force are
analyzed by dissecting the chiral interaction. We find that in general the
tensor force effect on electric giant resonances is not as significant as the
effect from the three-body force, although the tensor force provides more than
half of the binding energy. The effect from three-body force is strong in light
nuclei. Particularly, three-body force is crucial for the formation of the
pygmy resonance in calculations.

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The categories of this paper are: physics
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The categories of this paper are: math-ph
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The categories of this paper are: math
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The categories of this paper are: cmp-lg
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The categories of this paper are: econ
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The categories of this paper are: cs
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The categories of this paper are: funct-an
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The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
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The categories of this paper are: acc-phys
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The categories of this paper are: patt-sol
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: eess
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The categories of this paper are: comp-gas