Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Four-body calculation of ${}^2\mathrm{H}(d,p){}^3\mathrm{H}$ and
  ${}^2\mathrm{H}(d,n){}^3\mathrm{He}$ reactions above breakup threshold   Nucleon transfer reactions in deuteron-deuteron collisions at energies above
the three- and four-body breakup threshold are described using exact four-body
equations for transition operators that are solved in the momentum-space
framework. Differential cross sections, analyzing powers, polarizations, and
spin transfer coefficients are obtained using realistic two-nucleon potentials
and including the Coulomb repulsion between protons. Overall good agreement
between predictions and experimental data is found. Most remarkable
discrepancies are seen around the minima of the differential cross section at
higher energies and in the outgoing nucleon polarization at lower energies.

21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg