Milli-interacting Dark Matter

Understand

We present a dark matter model reproducing well the results from DAMA/LIBRA and CoGeNT and having no contradiction with the negative results from XENON100 and CDMS-II/Ge.

• Two new species of fermions F and G form hydrogen-like atoms with standard atomic size through a dark U(1) gauge interaction carried out by a dark massless photon.
• A Yukawa coupling between the nuclei F and neutral scalar particles S induces an attractive shorter-range interaction.
• This dark sector interacts with our standard particles because of the presence of two mixings, a kinetic photon-dark photon mixing, and a mass {\sigma}-S mixing.