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Directional direct detection of light dark matter up-scattered by cosmic rays from direction of the Galactic center
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abstract
Dark matter with MeV scale mass is difficult to detect with standard direct search detectors. However, they can be searched for by considering the up-scattering of kinetic energies by cosmic rays. Because the dark matter density is higher in the central region of the Galaxy, the up-scattered dark matter will arrive at Earth from the direction of the Galactic center. Once the dark matter is detected, we can expect to recognize this feature by directional direct detection experiments. In this study, we simulate the nuclear recoils of the up-scattered dark matter and quantitatively reveal that a large amount of this type of dark matter is arriving from the direction of the Galactic center. Also, we have shown that the characteristic signatures of the up-scattered dark matter can be verified with more than 5$\sigma$ confidence levels for the assumed target atoms and future upgrades to directional detectors.
Forward citations
Cited by 3 Pith papers
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Inelastic Scattering Effects on Attenuation of Boosted Dark Matter
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Direct Detection of Leptophobic Dark Matter with Electronic Collective Excitations
Leptophobic dark matter can excite plasmons in silicon through hadronic loops, and SENSEI data now constrain its nucleon cross section down to ~1e-31 cm^2 in the sub-MeV mass range.
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Directional Direct Detection of MeV Scale Boosted Dark Matter in Two Component Dark Matter Scenario via Dark Photon Interaction
A two-component dark photon model with a heavier dark matter annihilating into MeV-scale boosted dark matter could produce a few to hundreds of nuclear recoil events per year in NEWSdm nuclear emulsion, with a Galacti...
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