Directional Dark Matter Search with Super-Resolution Nuclear Emulsion
Abstract
Several approaches for the direct search of dark matter, in which the energy deposited by the scattering
dark matter particle is detected, are extensively used to constrain the mass and interaction strength of
these hypothetical particles. Gaining information on the income direction of the interacting particle 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 Nanoimaging Tracker. NIT consists of silver-halide crystals (AgBr(I)) with diameters at
the 10nm scale. The major feature of NIT is the possibility of detecting 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 introduce the technologies for the
NEWSdm experiment and discuss the challenges for the near-future dark matter search.
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