Direct Detection of Leptophilic Dark Matter in radiative seesaw model
Toma, Takashi (Kanazawa University)

In general it seems to be difficult to detect leptophilic dark matter in direct detection such as CDMSII, XENON100, CoGeNT, DAMA/LIBRA etc, since leptophilic dark matter has only interaction with leptons at tree level. Such a leptophilic dark matter candidate is included in the radiative seesaw model which has an interesting feature that the existence of dark matter and neutrino masses are related each other. We show that the direct detection rate is enhanced through the interaction with photon at 1-loop which intermediates between dark matter and quarks and has small transfer momentum.