The Annual Modulation Signature for Dark Matter: DAMA/LIBRA-Phase1 Results and Perspectives
Figure 9
Regions in the nucleon cross section versus DM particle mass plane allowed by DAMA for a DM candidate interacting via spin-independent elastic scattering on target-nucleus; three different instances for the Na and I quenching factors have been considered: (i) without including the channeling effect (green) vertically hatched region, (ii) by including the channeling effect (blue) horizontally hatched region), and (iii) without the channeling effect considering energy dependence of Na and I quenching factors [5] (red) crosshatched region. The velocity distributions and the same uncertainties as in [23, 24] are considered here. These regions represent the domain where the likelihood-function values differ more than from the null hypothesis (absence of modulation). The allowed region obtained for the CoGeNT experiment, including the same astrophysical models as in [23, 24] and assuming for simplicity a fixed value for the Ge quenching factor and a Helm form factor with fixed parameters, is also reported by a (black) thick solid line. This region includes configurations whose likelihood-function values differ more than from the null hypothesis (absence of modulation). For details, see [5].
