Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Modelling double charge exchange response function for tetraneutron
  system   This work is an attempt to model the $4n$ response function of a recent RIKEN
experimental study of the double charge exchange $^4$He($^8$He,$^8$Be)$^4$n
reaction in order to put in evidence an eventual enhancement mechanism of the
zero energy cross section, including a near-threshold resonance. This resonance
can indeed be reproduced only by adding to the standard nuclear Hamiltonian an
unphysically large T=3/2 attractive 3n-force which destroys the neighboring
nuclear chart. No other mechanisms like cusps or related structures were found.

10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
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The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th