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Diurnal Effect of Sub-GeV Dark Matter Boosted by Cosmic Rays
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Diurnal Effect of Sub-GeV Dark Matter Boosted by Cosmic Rays
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We point out a new type of diurnal effect for the cosmic ray boosted dark matter (DM). The DM-nucleon interactions not only allow the direct detection of DM with nuclear recoils, but also allow cosmic rays to scatter with and boost the nonrelativistic DM to higher energies. If the DM-nuclei scattering cross sections are sufficiently large, the DM flux is attenuated as it propagates through the Earth, leading to a strong diurnal modulation. This diurnal modulation provides another prominent signature for the direct detection of boosted sub-GeV DM, in addition to signals with higher recoil energy.
Forward citations
Cited by 4 Pith papers
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Search for sub-GeV dark particles in $\eta\to\pi^0+\rm{invisible}$ decay
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Inelastic Scattering Effects on Attenuation of Boosted Dark Matter
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Migdal Ionization as a Probe of Light Dark Matter from Nuclear Transition
Migdal ionization of reactor-produced sub-MeV dark matter in TEXONO germanium yields new 95% C.L. limits on the reference DM–proton cross section for 0.01 MeV ≤ mχ ≲ 2.6 MeV.
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Migdal Ionization as a Probe of Light Dark Matter from Nuclear Transition
Migdal ionization in a germanium detector can turn reactor-produced sub-MeV dark matter into observable signals, yielding new 95% C.L. limits on the DM–proton cross section for masses 0.01–2.6 MeV.
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