Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Determination of Strength of Isoscalar Pairing Interaction by a
  Mathematical Identity in QRPA   I propose a new method to determine the strength of the isoscalar
proton-neutron pairing interaction by a mathematical identity derived in the
quasiparticle random-phase approximation. This method is applied for a few
nuclei possibly having the neutrinoless double-$\beta$ decay. Reduced
half-life, the theoretical quantity necessary for determining the effective
neutrino mass, is calculated for $^{48}$Ca.

11
The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph