New results from DAMA/LIBRA

Abstract

DAMA/LIBRA is running at the Gran Sasso National Laboratory of the I.N.F.N.. Here the results obtained with a further exposure of 0.34 ton x yr are presented. They refer to two further annual cycles collected one before and one after the first DAMA/LIBRA upgrade occurred on September/October 2008. The cumulative exposure with those previously released by the former DAMA/NaI and by DAMA/LIBRA is now 1.17 ton x yr, corresponding to 13 annual cycles. The data further confirm the model independent evidence of the presence of Dark Matter (DM) particles in the galactic halo on the basis of the DM annual modulation signature (8.9 sigma C.L. for the cumulative exposure). In particular, with the cumulative exposure the modulation amplitude of the single-hit events in the (2 -- 6) keV energy interval measured in NaI(Tl) target is (0.0116 +- 0.0013) cpd/kg/keV; the measured phase is (146 +- 7) days and the measured period is (0.999 +- 0.002) yr, values well in agreement with those expected for the DM particles.

presented at the Int. Conf. Beyond the Standard Models of Particle Physics, Cosmology and Astrophysics (BEYOND 2010), 1-6 February 2010, Cape Town, South Africa

References in corpus (13)

• First results from DAMA/LIBRA and the combined results with DAMA/NaI
• The DAMA/LIBRA apparatus
• The origin of the positron excess in cosmic rays
• Constraints on WIMP Dark Matter from the High Energy PAMELA $\bar{p}/p$ data
• Galactic secondary positron flux at the Earth
• Possible implications of the channeling effect in NaI(Tl) crystals
• On electromagnetic contributions in WIMP quests
• Investigating electron interacting dark matter
• Mirror dark matter and the new DAMA/LIBRA results: A simple explanation for a beautiful experiment
• Interpreting the recent results on direct search for dark matter particles in terms of relic neutralino
• Investigating halo substructures with annual modulation signature
• Investigation on light dark matter
• Resonant Dark Matter

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