We develop a scenario whereby monopoles in a hidden sector yield a decaying
dark matter candidate of interest for the PAMELA and FERMI eΒ± 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 (β500 MeV), the monopole
(β3 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.Comment: 21 pages, various improvements and additional reference