Search for Dark-Matter-Nucleon Interactions with a Dark Mediator in PandaX-4T

PHYSICAL REVIEW LETTERS(2023)

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摘要
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 MeV/c(2) to 2 GeV/c(2). 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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关键词
dark-matter–nucleon dark-matter–nucleon,dark-matter–nucleon interactions,dark-matter–nucleon mediator
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