Dark photons coupling to L_μ-L_τ lepton number difference are a highly studied light dark matter candidate, with potential to be discovered through their impact on terrestrial neutrino oscillation experiments. We re-examine this in the light of claimed tensions between the NOνA and T2K long baseline experiments, also taking into account data from the MINOS experiment. We obtain leading limits on the L_μ-L_τ gauge coupling $g'$ versus dark photon mass mA', and find no statistically significant alleviation of the tension from inclusion of the new physics effect.
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Alonso-Álvarez et al. (2024) studied this question.
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