Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Monopoles, strings and dark matter   We develop a scenario whereby monopoles in a hidden sector yield a decaying
dark matter candidate of interest for the PAMELA and FERMI $e^\pm$ excesses.
The monopoles are not completely hidden due to a very small kinetic mixing and
a hidden photon mass. The latter also causes the monopoles and anti-monopoles
to be connected by strings. The resulting long-lived objects eventually decay
to hidden photons which tend to escape galactic cores before decaying. The mass
scales are those of the hidden photon ($\approx 500$ MeV), the monopole
($\approx 3$ TeV) and the mixing scale (close to the Planck scale). A gauge
coupling in the hidden sector is the only other parameter. This coupling must
be strong and this results in light point-like monopoles and light thin
strings.

9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
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The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas