XENONnT and LUX-ZEPLIN constraints on DSNB-boosted dark matter

Abstract

We consider a scenario in which dark matter particles are accelerated to semi-relativistic velocities through their scattering with the Diffuse Supernova Neutrino Background. Such a subdominant, but more energetic dark matter component can be then detected via its scattering on the electrons and nucleons inside direct detection experiments. This opens up the possibility to probe the sub-GeV mass range, a region of parameter space that is usually not accessible at such facilities. We analyze current data from the XENONnT and LUX-ZEPLIN experiments and we obtain novel constraints on the scattering cross sections of sub-GeV boosted dark matter with both nucleons and electrons. We also highlight the importance of carefully taking into account Earth's attenuation effects as well as the finite nuclear size into the analysis. By comparing our results to other existing constraints, we show that these effects lead to improved and more robust constraints.

29 pages, 11 figures, 2 tables, V3 references added, results unchanged, matches published version in JCAP

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• The Dark Matter Diffused Supernova Neutrino Background
• Primordial black holes as cosmic accelerators of light dark matter: Novel direct detection constraints
• Dark hyperCharge Symmetry
• Blazar-Boosted Dark Matter: Novel Signatures via Elastic and Inelastic Scattering
• Cosmic-ray-electron boosted light dark matter: Implications of LZ 2025 data