In a radiative-seesaw model, one-loop neutrino exchange produces CP-even ZZh anomalous couplings as large as ~10^-3, while CP-odd couplings stay at ~10^-15.
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New physics in the $ZZh$ vertex: One-loop contributions from a radiative seesaw model
In a radiative-seesaw model, one-loop neutrino exchange produces CP-even ZZh anomalous couplings as large as ~10^-3, while CP-odd couplings stay at ~10^-15.