Majorana neutrinos convert to antineutrinos in ultralight vector dark matter backgrounds coupled to lepton number, enabling supernova neutrino detectors to probe gauge couplings as small as 10^{-32} for masses around 10^{-22} to 10^{-14} eV.
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Nelson-Barr mechanism yields ultralight scalar dark matter inducing time-periodic variation in CKM matrix elements, distinguishable from QCD axion and detectable via nuclear clocks.
Ultralight dark matter induces oscillating CKM elements that can be probed at NA62 through direct counting of meson decay events, which avoids sensitivity loss from unknown particle flux.
Incorporating timing information from time-dependent new physics signals can improve LHC search sensitivity by up to a factor of two compared to standard time-invariant analyses.
Systematic study of scalar and vector ULDM interactions on long-baseline neutrino oscillations finds order-of-magnitude weaker constraints for m_φ ≲ 10^{-17} eV due to stochastic effects, with combined T2K+NOvA data showing no alleviation of δ_CP discrepancy.
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Neutrino-Antineutrino Conversion from Ultralight Vector Dark Matter
Majorana neutrinos convert to antineutrinos in ultralight vector dark matter backgrounds coupled to lepton number, enabling supernova neutrino detectors to probe gauge couplings as small as 10^{-32} for masses around 10^{-22} to 10^{-14} eV.