MG15 - Talk detail

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Abstract

The DAMA/LIBRA set-up (about 250 kg highly radiopure NaI(Tl)) is currently in data taking at the Gran Sasso National Laboratory of the I.N.F.N. in its phase2. This experiment is dedicated to the investigation of Dark Matter particles in the galactic halo by exploiting the model independent annual modulation signature. Recently the data of the first 6 annual cycles of DAMA/LIBRA-phase2 have been released. They correspond to a total exposure of 1.13 ton × yr. The improved experimental configuration of DAMA/LIBRA-phase2 has allowed to lower the software energy threshold to 1 keV. The data confirm the evidence of a signal that meets all the requirements of the model independent Dark Matter (DM) annual modulation signature, at 9.5\sigma C.L. in the energy region (1–6) keV. In the energy region between 2 and 6 keV, where data are also available from DAMA/NaI and DAMA/LIBRA–phase1 (exposure 1.33 ton × yr, collected over 14 annual cycles), the achieved C.L. for the full exposure (2.46 ton × yr) is 12.9\sigma. In the talk the new results will be summarized and the future perspectives of the DAMA/LIBRA experiment will be addressed.

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