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Distinctive signals of boosted dark matter from its semi-annihilation
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abstract
Dark matter can be boosted by various mechanisms, which may produce characteristic signals that are different from those of canonical dark matter. We show that the semi-annihilation $\chi\chi\to\bar{\chi}\nu$ produces signals that are distinctive from those of other semi-annihilation and standard dark matter annihilation processes. Because the boosted dark matter produced by the semi-annihilation process is regarded as a high-energy neutrino, the total flux of the dark matter and the accompanying neutrino produce double peaks in the energy close to the dark matter mass. We show that it will be possible to detect both of the particles produced at the Sun using future large volume neutrino detectors such as those of the Deep Underground Neutrino Experiment and Hyper-Kamiokande.
Forward citations
Cited by 3 Pith papers
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Primordial black holes as cosmic accelerators of light dark matter: Novel direct detection constraints
Primordial black hole evaporation generates light fermionic dark matter capable of producing electron recoils in XENONnT, LZ, and PandaX-4T, enabling new constraints on DM-electron interactions after including Earth a...
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Dark Matter Heating of Compact Stars Beyond Capture: A Relativistic Framework for Energy Deposition by Particle Beams
A new relativistic formalism computes capture and energy deposition of directed particle beams in compact stars, applied to blazar-boosted dark matter heating of white dwarfs and neutron stars.
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Dark matter spikes with strongly self-interacting particles
Number-changing dark matter self-interactions can significantly deplete dark matter spikes around supermassive black holes, while the 2 to 1 semi-annihilation generally preserves the spike structure.
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