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Solar Reflection of Dark Matter
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Solar Reflection of Dark Matter
abstract
The scattering of light dark matter off thermal electrons inside the Sun produces a "fast" sub-component of the dark matter flux that may be detectable in underground experiments. We update and extend previous work by analyzing the signatures of dark matter candidates which scatter via light mediators. Using numerical simulations of the dark matter-electron interaction in the solar interior, we determine the energy spectrum of the reflected flux, and calculate the expected rates for direct detection experiments. We find that large Xenon-based experiments (such as XENON1T) provide the strongest direct limits for dark matter masses below a few MeV, reaching a sensitivity to the effective dark matter charge of better than $\sim 10^{-9}e$.
Forward citations
Cited by 11 Pith papers
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Solar Reflected Dark Matter under the Influence of a Dark Magnetic Field
For dark photon masses m_V ≲ 10⁻¹⁵ eV and dark matter masses m_χ ≲ 0.1 MeV, the solar dark magnetic field shields the core, weakening the solar-reflected dark matter reach of XENONnT and CDEX-10.
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Dark matter energy exchange in stars orbiting supermassive black holes
Orbit-averaged elastic DM scattering in S4714 reaches stellar luminosity at σ_χp ∼ 10^{-36} cm² (MeV–GeV) and σ_χe ∼ 5×10^{-38} cm² (sub-MeV) for a spiked profile.
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Solar Reflection of Inelastic Dark Matter
Solar-reflected inelastic dark matter produces detectable signals in xenon and semiconductor detectors, enabling new constraints on MeV-scale dark matter parameter space.
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SENSEI: A Search for Diurnal Modulation in sub-GeV Dark Matter Scattering
No sidereal daily modulation is seen in SENSEI single-electron data; the 90% C.L. amplitude bound is 6.8 e−/g/day and sub-MeV dark-matter cross-section limits improve by about an order of magnitude.
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Dark matter energy exchange in stars orbiting supermassive black holes
Orbit-averaged DM energy exchange for S4714 reaches stellar luminosity at σ_χp ~ 10^{-36} cm² (MeV-GeV) and σ_χe ~ 5×10^{-38} cm² (sub-MeV) for spiked DM profiles.
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Boosted Dark Matter from Sagittarius A$^\star$
The nuclear star cluster around Sgr A* is the dominant source of gravitationally boosted dark matter in the Milky Way, with particles up to ~25,000 km/s that enhance sub-GeV detection prospects independently of the DM model.
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Sub-GeV dark matter from cosmic ray bremsstrahlung in the atmosphere
Boosted sub-GeV dark matter from atmospheric cosmic ray bremsstrahlung can be probed by direct detection and neutrino experiments, with enhanced sensitivity near vector mediator resonances.
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New Thermal-Relic Targets for sub-GeV Dark Matter Direct Detection
For sub-GeV dark matter coupled to anomaly-free U(1) mediators, thermal freeze-out predicts electron-recoil cross sections that are already excluded for electrophilic mediators but still viable and discoverable for el...
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Dark Secrets of Baryons: Illuminating Dark Matter-Baryon Interactions with JWST
JWST ultraviolet luminosity function data currently provide the strongest upper limits on velocity-dependent (∝v^{-2}) dark matter–proton scattering for sub-GeV dark matter.
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Study of sub-GeV Dipolar Dark States at SND@LHC within Invisible Bounds on Meson Decays
SND@LHC could probe sub-GeV dark matter with electric/magnetic dipole moments in parts of parameter space not yet excluded, especially around 0.5 MeV in HL-LHC, but existing LEP and CHARM II bounds remain tighter in m...
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Underground Production of Electromagnetic Dark States by MeV-scale Electron Beams and Detection with CCDs
Proposes underground MeV-scale electron-beam production of millicharged or dipole fermions followed by CCD detection to access unconstrained parameter space.
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