Benchmarks for Higgs Effective Theory: Extended Higgs Sectors

Abstract

Precise measurements of SM particles properties at the LHC allows to look for heavy New Physics in the context of an Effective Field Theory (EFT). These searches, however, often rely on kinematic regions where the validity of the EFT may be compromised. In this paper we propose to address this issue by comparing with benchmark models. The connection between models and their manifestations as EFTs at low energies allows us to quantify the breakdown of the EFT, and describe ways to combine different sources of constraints beyond Higgs physics. To illustrate these techniques, in this paper we propose a set of benchmark models based on extensions of the Higgs sector, namely the inclusion of a singlet, a dilaton and generic 2HDMs. We obtain the matching between these models and the EFT involving the Higgs, electroweak bosons and fermions. We then describe current and future indirect and direct constraints, consider the effect of correlations among the coefficients within models, and discuss the validity of the EFT.

48 pages, 10 figures. Version published in JHEP

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Cited by in corpus (10)

• CoDEx: Wilson coefficient calculator connecting SMEFT to UV theory
• Extending the Universal One-Loop Effective Action: Heavy-Light Coefficients
• Mixed Heavy-Light Matching in the Universal One-Loop Effective Action
• Discovery Prospects of a Light Scalar in the NMSSM
• Standard Model Extended by a Heavy Singlet: Linear vs. Nonlinear EFT
• Doubling Up on Supersymmetry in the Higgs Sector
• Searching for a Heavy Higgs boson in a Higgs-portal B-L Model
• Comparing EFT and Exact One-Loop Analyses of Non-Degenerate Stops
• Radiative Light Dark Matter
• BSM Benchmarks for Effective Field Theories in Higgs and Electroweak Physics