The pole-level ratio M_Z M_t / M_H² is 1.00362 ± 0.00261, consistent with an exact relation at 1.4 sigma, but the NNLO-matched MSbar version at the top scale deviates to 0.96714, requiring either a pole-level symmetry or a finite threshold factor of 1.034.
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The Higgs-top-$Z$ mass coincidence relation after NNLO matching
The pole-level ratio M_Z M_t / M_H² is 1.00362 ± 0.00261, consistent with an exact relation at 1.4 sigma, but the NNLO-matched MSbar version at the top scale deviates to 0.96714, requiring either a pole-level symmetry or a finite threshold factor of 1.034.