DAMA/NaI results on particle Dark Matter investigation by the model independent annual modulation signature

The direct model independent DAMA/NaI detected signal from Dark Matter particles in the galactic halo

The DAMA/NaI experiment was proposed in 1990, designed and realized having the main aim to investigate in a model independent way the presence of a Dark Matter particle component in the galactic halo.

For this purpose, we planned to exploit the effect of the Earth revolution around the Sun on the Dark Matter particles interactions on a suitable underground set-up. In fact, as a consequence of its annual revolution, the Earth should be crossed by a larger flux of Dark Matter particles roughly around June 2nd (when its rotational velocity is summed to the one of the solar system with respect to the Galaxy) and by a smaller one roughly around December 2nd (when the two velocities are subtracted).