Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Study of n-n correlations in d + 2H --> p + p + n + n reaction   A kinematically complete measurement of the four-body breakup reaction
d+2H-->2ps+2ns --> p +p +n +n has been performed at 15 MeV deuteron beam of the
SINP MSU. The two protons and neutron were detected at angles close to those of
emission of 2ps and 2ns systems. The energy of singlet dineutron state was
determined by comparing experimental TOF spectrum of breakup neutrons with
simulated spectra depending on this energy. A low value Enn = 0.076 +/- 0.006
keV obtained by fitting procedure apparently indicates an effective enhancement
of nn-interaction in the intermediate state of studied reaction.

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The categories of this paper are: math
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom