Discovery potential for directional Dark Matter detection with nuclear emulsions

Direct Dark Mattersearches are nowadays one of the most fervid research topics with many experimental efforts devoted to the search for nuclear recoilsinduced by the scattering of Weakly Interactive Massive Particles( WIMPs). Detectors able to reconstruct the direction of the nucleus recoilingagainst the scattering WIMPare opening a new frontier to possibly extend Dark Mattersearches beyond the neutrino background. Exploiting directionality would also prove the galactic origin of Dark Matterwith an unambiguous signal-to-background separation. Indeed, the angular distribution of recoilednuclei is centered around the direction of the Cygnusconstellation, while the background distribution is expected to be isotropic. Current directional experimentsare based on gas TPC whose sensitivity is limited by the small achievable detector mass. In this paper we present the discovery potential of a directional experimentbased on the use of a solid target made of newly developed nuclear emulsionsand of optical read-out systems reaching unprecedented nanometric resolution.