Séminaire: Dark Matter Direct Detection. New solutions to the annual modulation seen by DAMA.

par Dr Fu-Sin Ling

lundi 15 mars 2010, 14:30 → 15:30 Europe/Paris

Sall 9213

The experiment DAMA has observed 11 successive cycles of annual modulation in the rate of nuclear recoils, with a statistical significance of 8.2 sigmas. Ways to reconcile this signal with null results of other direct detection experiments lead to a low mass elastic scattering solution as well as several inelastic scattering solutions. On the particle physics side, simple scalar extensions of the Standard Model as the Inert Doublet Model provide naturally with these possibilities and open up for interesting Grand Unified schemes. On the astrophysics side, recent N-body simulations with baryons show that dark matter velocity distributions significantly deviate from Maxwellian ones, and suggest the existence of a dark disc component that is co-rotating with the stellar disc. It is found that the statistical significance of the DAMA solutions is strongly improved with realistic distributions.

Slides Fu-Sin_Ling-Clermont.pdf