Directional Dark Matter Search with Super-resolution Nuclear Emulsion

Abstract

Direct dark matter approaches are currently extensively used to search for the dark matter, and the directional
information of dark matter candidates would be the only way to overcome the neutrino floor or to
study the properties of any found signal. We are studying the direction sensitive dark matter search using
a super-high resolution nuclear emulsion, NIT which stands for Nano Imaging Tracker. NIT consists of
silver-halide crystlas (AgBr(I)) with diameters at the 10 nm scale, and they can detect nanometric tracks as
expected for nuclear recoils induced by dark matter scattering. The NEWSdm project is carrying out measurements
in the Gran Sasso INFN laboratory, LNGS, in Italy. In this review, we review the technologies
for the NEWSdm experiment and the challenges for the near-future dark matter search.