Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Relativistic approach to nuclear spin-isospin excitations including
  quasiparticle-vibration coupling   The spin-isospin response of stable and exotic nuclei is investigated in the
framework of the proton-neutron relativistic quasiparticle time-blocking
approximation (pn-RQTBA). Based on the Covariant Density Functional Theory,
this method extends the proton-neutron Relativistic Quasiparticle Random-Phase
Approximation (pn-RQRPA) by including the coupling between single
quasiparticles and collective nuclear vibrations. In the charge-exchange
channel, this coupling generates a time-dependent effective interaction between
proton and neutron quasiparticles. The particle-hole component of this
interaction adds to the static pion and rho-meson exchange, while the
particle-particle component provides a microscopic and consistent
proton-neutron pairing interaction. We find that such dynamical effects induce
fragmentation and spreading of the Gamow-Teller transition strength which are
important for a better agreement with the experimental measurements and for an
accurate description of $\beta$-decay rates. The new developments include the
coupling of single nucleons to isospin-flip vibrations in doubly-magic nuclei.
We find that these phonons can have a non-negligible effect on $\beta$-decay
half-lives and "quenching" of the strength.

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The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom