In the 2HD+a model with near-zero A-a mixing, single-component WIMP dark matter naturally lies below the neutrino floor above 100 GeV while two-component scenarios are largely excluded by current bounds.
Benchmarking LHC searches for light 2HDM+a pseudoscalars,
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Charting Dark Matter down to the neutrino floor/fog in the 2HD+a scenario
In the 2HD+a model with near-zero A-a mixing, single-component WIMP dark matter naturally lies below the neutrino floor above 100 GeV while two-component scenarios are largely excluded by current bounds.