New physics interpretations for nonstandard values of $h\to Z\gamma$

Current measurement of the $h\to Z\gamma$ signal strength invite us to speculate about possible new physics interactions that exclusively affect ${\mu }_{Z\gamma }$ without altering the other signal strengths. Additional consideration of tree-unitarity enables us to correlate the nonstandard values of ${\mu }_{Z\gamma }$ with an upper limit on the scale of new physics. We find that even when ${\mu }_{Z\gamma }$ deviates from the SM value by only $20\mathrm{\%}$, the scale of new physics should be well within the reach of the LHC.