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We describe a simple model of dark matter, which explains the PAMELA/ATIC excesses while being consistent with all present constraints. The DAMA annual modulation signal can also be explained for some values of the parameters. The model consists of a dark sector containing a weakly coupled broken U (1) gauge symmetry, under which only the dark matter state and the leptons are charged.
Fox et al. (2009) studied this question.
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