Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Probing the deuteron structure at small NN distances by
  antiproton-deuteron annihilation   The production of pions by antiproton-deuteron annihilation at rest is
analyzed. Assuming the possible existence of two delta-isobars in a deuteron
some enhancement in the distribution over the invariant mass of two negative
charged pions is predicted.

23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
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The categories of this paper are: eess
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat