Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-04-04
Nucl.Phys.B850:505-521,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
19 pages, 4 figures
Scientific paper
10.1016/j.nuclphysb.2011.05.006
The signals observed at the direct detection experiments DAMA, CoGeNT and CRESST could be explained by light WIMPs with sizeable spin-independent cross sections with nucleons. The capture and subsequent annihilation of such particles in the sun would induce neutrino signals in the GeV range which may be observed at Super-Kamiokande. We determine the rate of upward stopping muons and fully contained events at Super-Kamiokande for various possible WIMP annihilation channels. This allows us to provide strong constraints on the cross section of WIMPs with nucleons. We find that the DAMA and CoGeNT signals are inconsistent with standard thermal WIMPs annihilating dominantly into neutrino or tau pairs. We also provide limits for spin-dependent WIMP nucleus scattering for masses up to 80 GeV. These exclude the DAMA favored region if WIMPs annihilate even subdominantly into neutrinos, taus, bottoms or charms.
Kappl Rolf
Winkler Martin Wolfgang
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