Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Collective multipole excitations based on correlated realistic
  nucleon-nucleon interactions   We investigate collective multipole excitations for closed shell nuclei from
16O to 208Pb using correlated realistic nucleon -nucleon interactions in the
framework of the random phase approximation (RPA). The dominant short-range
central and tensor correlations a re treated explicitly within the Unitary
Correlation Operator Method (UCOM), which provides a phase-shift equivalent
correlated interaction V_UCOM adapted to simple uncorrelated Hilbert spaces.
The same unitary transformation that defines the correlated interaction is used
to derive correlated transition operators. Using V_UCOM we solve the
Hartree-Fock problem and employ the single-particle state s as starting point
for the RPA. By construction, the UCOM-RPA is fully self-consistent, i.e. the
same correlated nucleon-nucleon interact ion is used in calculations of the HF
ground state and in the residual RPA interaction. Consequently, the spurious
state associated with t he center-of-mass motion is properly removed and the
sum-rules are exhausted within +-3%. The UCOM-RPA scheme results in a
collective character of giant monopole, dipole, and quadrupole resonances in
closed-shell nuclei across the nuclear chart. For the isoscalar giant monopole
resonance, the resonance energies are in agreement with experiment hinting at a
reasonable compressibility. However, in the 1- and 2+ channels the resonance
energies are overestimated due to missing long-range correlations and
three-body contributions.

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The categories of this paper are: math-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: supr-con
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The categories of this paper are: eess
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The categories of this paper are: q-alg
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-fin
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-ph
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The categories of this paper are: hep-th
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The categories of this paper are: hep-lat
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The categories of this paper are: cmp-lg
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The categories of this paper are: q-bio
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The categories of this paper are: solv-int
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The categories of this paper are: funct-an
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The categories of this paper are: physics