Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 5, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP05(2017)096
Keywords
Higgs Physics; Beyond Standard Model
Categories
Funding
- Science Technology and Facilities Council (STFC) [ST/L000326/1]
- STFC [ST/J000477/1]
- Research Fellowship from Gonville and Caius College, Cambridge
- Science and Technology Facilities Council [ST/L000504/1, ST/L000385/1, ST/J000477/1, ST/P000681/1, ST/P000258/1] Funding Source: researchfish
- STFC [ST/P000258/1, ST/J000477/1, ST/P000681/1, ST/L000385/1, ST/L000504/1] Funding Source: UKRI
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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 energies up to 3 TeV, incorporating also Higgsstrahlung projections at higher energies that had not been considered previously, and use them to explore the prospective CLIC sensitivities to decoupled new physics. We present the resulting constraints on the Wilson coefficients of dimension-6 operators in a model-independent approach based on the Standard Model effective field theory (SM EFT). The higher centre-of-mass energy of CLIC, compared to other projects such as the ILC and CEPC, gives it greater sensitivity to the coefficients of some of the operators we study. We find that CLIC Higgs measurements may be sensitive to new physics scales Lambda = O(10) TeV for individual operators, reduced to O(1) TeV sensitivity for a global fit marginalising over the coefficients of all contributing operators. We give some examples of the corresponding prospective constraints on specific scenarios for physics beyond the SM, including stop quarks and the dilaton/radion.
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