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Search for Dark-Matter-Nucleon Interactions with a Dark Mediator in PandaX-4T (2308.01540v3)

Published 3 Aug 2023 in hep-ex and hep-ph

Abstract: We report results of a search for dark-matter-nucleon interactions via a dark mediator using optimized low-energy data from the PandaX-4T liquid xenon experiment. With the ionization-signal-only data and utilizing the Migdal effect, we set the most stringent limits on the cross section for dark matter masses ranging from 30~$\rm{MeV/c2}$ to 2~$\rm{GeV/c2}$. Under the assumption that the dark mediator is a dark photon that decays into scalar dark matter pairs in the early Universe, we rule out significant parameter space of such thermal relic dark-matter model.

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