Searching for Dark Matter in the Sun using Hyper-Kamiokande

Abstract

We study the ability of the Hyper-Kamiokande (HyperK) experiment, currently under construction, to constrain a neutrino signal produced via the annihilation of dark matter captured in the Sun. We simulate upward stopping and upward through-going muon events at HyperK, using Super-Kamiokande (SuperK) atmospheric neutrino results for validation, together with fully and partially contained events. Considering the annihilation of dark matter to various standard model final states, we determined the HyperK sensitivity to the dark matter spin-dependent scattering cross-section. We find that HyperK will improve upon current SuperK limits by a factor of 2-3, with a further improvement in sensitivity possible if systematic errors can be decreased relative to SuperK.

arXiv comment23 pages, 11 figures, 2 tables. Discussion extended, references added, matches published version

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• Improved Treatment of Dark Matter Capture in White Dwarfs
• Neutrinos from captured dark matter annihilation in a galactic population of neutron stars
• Solar constraints on captured electrophilic dark matter
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• Improved Treatment of Dark Matter Capture in Compact Stars
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