A gauged, flavor-specific U(1)_X two-Higgs-doublet model can realize the axial-vector Z' couplings needed to explain the ATOMKI 8Be and 4He anomalies while evading current bounds.
Clarity through the Neutrino Fog: Constraining New Forces in Dark Matter Detectors
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Future dark matter detectors with ~3000 ton-yr exposure could probe sterile neutrino mixing with νμ and ντ in parameter space not reached by long-baseline or atmospheric searches.
citing papers explorer
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Flavor specific chiral $U(1)_X$ framework for explaining the ATOMKI anomaly
A gauged, flavor-specific U(1)_X two-Higgs-doublet model can realize the axial-vector Z' couplings needed to explain the ATOMKI 8Be and 4He anomalies while evading current bounds.
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Sterile Neutrino Mixing Parameters from Solar-Neutrino Coherent Scattering
Future dark matter detectors with ~3000 ton-yr exposure could probe sterile neutrino mixing with νμ and ντ in parameter space not reached by long-baseline or atmospheric searches.