Effective Field Theory with Two Higgs Doublets

Abstract

In this article we extend the effective field theory framework describing new physics effects to the case where the underlying low-energy theory is a Two-Higgs-Doublet model. We derive a complete set of independent operators up to dimension six assuming a $Z_2$-invariant CP-conserving Higgs potential. The effects on Higgs and gauge boson masses, mixing angles in the Higgs sector as well as couplings to fermions and gauge bosons are computed. At variance with the case of a single Higgs doublet, we find that pair production of SM-like Higgses, arising through dimension-six operators, is not fixed by fermion-fermion-Higgs couplings and can therefore be sizable.

19 pages, 8 tables, minor modifications, redundant operator in Table 4 removed

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• Revisiting the non-resonant Higgs pair production at the HL-LHC
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• Hilbert Series and Plethystics: Paving the path towards 2HDM- and MLRSM-EFT
• Resonant heavy Higgs searches at the HL-LHC
• Effective Operator Bases for Beyond Standard Model Scenarios: An EFT compendium for discoveries
• Beyond the Standard Model Effective Field Theory: The Singlet Extended Standard Model
• Dark Matter Signals at the LHC from a 3HDM
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• Prospects of non-resonant di-Higgs searches and Higgs boson self-coupling measurement at the HE-LHC using machine learning techniques
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• Probing the Higgs boson through Yukawa force
• Relaxed constraints on the heavy scalar masses in 2HDM
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• Veltman Criteria in Beyond Standard Model Effective Field Theory of Complex Scalar Triplet
• Composite 2-Higgs Doublet Model: Strong Effects on Higgs Pair Production
• Maximal value for trilinear Higgs coupling in a 3-3-1 EFT
• Prospects for exotic $h\to 4\tau$ decays in single and di-Higgs boson production at the LHC and future hadron colliders
• Higgs couplings in SMEFT via Zh production at the HL-LHC
• Two-loop dimension Six Effective Action: Integrating Out Heavy Scalar