Sensitivities of Prospective Future e+e- Colliders to Decoupled New Physics
Ellis, John · You, Tevong
Original · EN
We explore the indirect sensitivities to decoupled new physics of prospective precision electroweak measurements, triple-gauge-coupling measurements and Higgs physics at future e+e- colliders, with emphasis on the ILC250 and FCC-ee. The Standard Model effective field theory (SM EFT) is adopted as a model-independent approach for relating experimental precision projections to the scale of new physics, and we present prospective constraints on the Wilson coefficients of dimension-6 operators. We find that in a marginalised fit ILC250 EWPT measurements may be sensitive to new physics scales Λ= O(10) TeV, and FCC-ee EWPT measurements may be sensitive to Λ= O(30) TeV. The prospective sensitivities of Higgs and TGC measurements at the ILC250 (FCC-ee) are to Λ= O(1) TeV (Λ= O(2) TeV).
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