Light Dark Matter Detection Prospects at Neutrino Experiments

Details Light Dark Matter Detection Prospects at Neutrino Experiments Light Dark Matter Detection Prospects at Neutrino Experiments

2009-08-12

arxiv.org/abs/0908.1768v5

Phys.Rev.D80:113002,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 2 figures, pdflatex, references, one figure and comments on electron neutrino bounds and on spin-dependent scatterin

Scientific paper

10.1103/PhysRevD.80.113002

We consider the prospects for the detection of relatively light dark matter through direct annihilation to neutrinos. We specifically focus on the detection possibilities of water Cherenkov and liquid scintillator neutrino detection devices. We find in particular that liquid scintillator detectors may potentially provide excellent detection prospects for dark matter in the 4-10 GeV mass range. These experiments can provide excellent corroborative checks of the DAMA/LIBRA annual modulation signal, but may yield results for low mass dark matter in any case. We identify important tests of the ratio of electron to muon neutrino events (and neutrino versus anti-neutrino events), which discriminate against background atmospheric neutrinos. In addition, the fraction of events which arise from muon neutrinos or anti-neutrinos ($R_{\mu}$ and $R_{\bar \mu}$) can potentially yield information about the branching fractions of hypothetical dark matter annihilations into different neutrino flavors. These results apply to neutrinos from secondary and tertiary decays as well, but will suffer from decreased detectability.

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