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We estimate the possible accuracies of measurements at the proposed CLIC$e^+e^-$ collider of Higgs and $W^+W^-$ production at centre-of-mass energiesup to 3TeV, incorporating also Higgsstrahlung projections at higher energiesthat had not been considered previously, and use them to explore theprospective CLIC sensitivities to decoupled new physics. We present theresulting constraints on the Wilson coefficients of dimension-6 operators in amodel-independent approach based on the Standard Model effective field theory(SM EFT). The higher centre-of-mass energy of CLIC, compared to other projectssuch as the ILC and CEPC, gives it greater sensitivity to the coefficients ofsome of the operators we study. We find that CLIC Higgs measurements may besensitive to new physics scales $\Lambda = \mathcal{O}(10)$TeV for individualoperators, reduced to $\mathcal{O}(1)$ TeV sensitivity for a global fitmarginalising over the coefficients of all contributing operators. We give someexamples of the corresponding prospective constraints on specific scenarios forphysics beyond the SM, including stop quarks and the dilaton/radion.

Dimension-6 Operator Analysis of the CLIC Sensitivity to New Physics