We study the effect of a long-range DM-nuclei interaction occurring via the
exchange of a light mediator. We consider the main direct detection
experiments: DAMA, CoGeNT, CRESST, CDMS and XENON100. We find that a long-range
force is a viable mechanism, which can provide full agreement between the
various experiments, especially for masses of the mediator in the 10-30 MeV
range and a light DM with a mass around 10 GeV. The relevant bounds on the
light mediator mass and scattering cross section are then derived.Comment: 3 pages, 1 figure; To appear in the Proceedings of the 47th
Rencontres de Moriond on Cosmolog
