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Type: Journal article
Title: A halo-independent lower bound on the dark matter capture rate in the Sun from a direct detection signal
Author: Blennow, M.
Herrero-Garcia, J.
Schwetz, T.
Citation: Journal of Cosmology and Astroparticle Physics, 2015; 2015(5):036-1-036-24
Publisher: IOP Publishing
Issue Date: 2015
ISSN: 1475-7516
Statement of
Mattias Blennowa, Juan Herrero-Garciaa and Thomas Schwetz
Abstract: We show that a positive signal in a dark matter (DM) direct detection experiment can be used to place a lower bound on the DM capture rate in the Sun, independent of the DM halo. For a given particle physics model and DM mass we obtain a lower bound on the capture rate independent of the local DM density, velocity distribution, galactic escape velocity, as well as the scattering cross section. We illustrate this lower bound on the capture rate by assuming that upcoming direct detection experiments will soon obtain a significant signal. When comparing the lower bound on the capture rate with limits on the high-energy neutrino flux from the Sun from neutrino telescopes, we can place upper limits on the branching fraction of DM annihilation channels leading to neutrinos. With current data from IceCube and Super-Kamiokande non-trivial limits can be obtained for spin-dependent interactions and direct annihilations into neutrinos. In some cases also annihilations into ττ or b b start getting constrained. For spin-independent interactions current constraints are weak, but they may become interesting for data from future neutrino telescopes.
Rights: Article funded by SCOAP. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
DOI: 10.1088/1475-7516/2015/05/036
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