Direct detection of neutralino dark matter in supergravity

Abstract

The direct detection of neutralino dark matter is analysed in general supergravity scenarios, where non-universal soft scalar and gaugino masses can be present. In particular, the theoretical predictions for the neutralino-nucleon cross section are studied and compared with the sensitivity of dark matter detectors. We take into account the most recent astrophysical and experimental constraints on the parameter space, including the current limit on B(B 0 s → µ + µ − ). The latter puts severe limitations on the dark matter scattering cross section, ruling out most of the regions that would be within the reach of present experiments. We show how this constraint can be softened with the help of appropriate choices of non-universal parameters which increase the Higgsino composition of the lightest neutralino and minimise the chargino contribution to the b → s transition.

Status and perspectives of indirect and direct dark matter searches

“…The upper limits are here re-calculated in order to show the sizeable dependence of direct detection on the phase space properties of WIMPs in the galactic halo (Bottino et al, 2005a). Figure 3 is an example of theoretical prediction in a different supersymmetric models, namely a minimal Supergravity (SUGRA) scheme with non- universality in the Higgs sector (Baek et al, 2005). In these type of models, especially in strict universal SUGRA, typically the predictions are lower than in the case of low-energy MSSM.…”

Publisher’s Note: Search forBs0→μ+μ−andB0→μAaltonen1, González2, Amerio3 et al. 2011Phys. Rev. Lett.744730View full textAdd to dashboardCite

“…Their branching fractions are predicted in the SM to be (3.2 ± 0.2) × 10 −9 and (1.0 ± 0.1) × 10 −10 , respectively [2]. A wide variety of beyond-SM theories predict significant increases over the SM branching fraction [3], making the study of [4][5][6] contribute significantly to our knowledge of the available new physics parameter space [7][8][9][10][11].…”

Search forBs0→μ+μ−andB0→μ+Aaltonen1, Adelman2, Akimoto3 et al. 2008Phys. Rev. Lett.1702150View full textAdd to dashboardCite

“…We observe no evidence for new physics and set limits that are the most stringent to date, improving the previous results [3,4] by a factor of 2 or more. These limits place further constraints on new-physics models [5][6][7][8][9], and complement direct searches for new physics. We expect the analysis sensitivity to continue to improve as we include larger data sets.…”