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arXiv · 1208.0827

New Sensitivity to Solar WIMP Annihilation using Low-Energy Neutrinos

Carsten Rott·Jennifer Siegal-Gaskins·John F. Beacom
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Abstract

Dark matter particles captured by the Sun through scattering may annihilate and produce neutrinos, which escape. Current searches are for the few high-energy neutrinos produced in the prompt decays of some final states. We show that interactions in the solar medium lead to a large number of pions for nearly all final states. Positive pions and muons decay at rest, producing low-energy neutrinos with known spectra, including nuebar through neutrino mixing. We demonstrate that Super-Kamiokande can thereby provide a new probe of the spin-dependent WIMP-proton cross section. Compared to other methods, the sensitivity is competitive and the uncertainties are complementary.

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Carsten Rott, Jennifer Siegal-Gaskins, John F. Beacom. 2012-08-03. New Sensitivity to Solar WIMP Annihilation using Low-Energy Neutrinos. https://doi.org/10.1103/physrevd.88.055005

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