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Belle II has reported the first evidence for B+→K+νν¯ with a branching ratio 2.7σ higher than the standard model expectation. We explain this and the MiniBooNE and muon anomalous magnetic moment anomalies in a model with a dark scalar that couples to a slightly heavier sterile Dirac neutrino and that communicates with the visible sector via a Higgs portal. We make predictions for rare kaon and other B meson decays. Published by the American Physical Society 2024
Datta et al. (Thu,) studied this question.