Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Narrow bound states of the DNN system   We report on a recent calculation of the properties of the $DNN$ system, a
charmed meson with two nucleons. The system is analogous to the $\bar K NN$
system substituting a strange quark by a charm quark. Two different methods are
used to evaluate the binding and width, the Fixed Center approximation to the
Faddeev equations and a variational calculation. In both methods we find that
the system is bound by about 200 MeV and the width is smaller than 40 MeV, a
situation opposite to the one of the $\bar K NN$ system and which makes this
state well suited for experimental observation.

4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat