Including dimension-8 SMEFT operators alters the allowed parameter space for dimension-6 coefficients in fits to top-decay helicity fractions due to non-trivial correlations and degeneracies at O(Λ^{-4}).
Complete set of dimension-eight operators in the standard model effective field theory
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Multijet and VBF processes can constrain directions in the ten-dimensional space of four-light quark operator Wilson coefficients in SMEFT via linear SM interference.
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W-boson helicity fractions in top decay as probes of dimension-6 and dimension-8 SMEFT operators
Including dimension-8 SMEFT operators alters the allowed parameter space for dimension-6 coefficients in fits to top-decay helicity fractions due to non-trivial correlations and degeneracies at O(Λ^{-4}).
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Constraining the four-light quark operators in the SMEFT with multijet and VBF processes at linear level
Multijet and VBF processes can constrain directions in the ten-dimensional space of four-light quark operator Wilson coefficients in SMEFT via linear SM interference.