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Related Experiment Video

Updated: Mar 1, 2026

Setting Limits on Supersymmetry Using Simplified Models

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Published on: November 15, 2013

Higgs EFT for 2HDM and beyond.

Hermès Bélusca-Maïto¹, Adam Falkowski¹, Duarte Fontes²

¹Laboratoire de Physique Théorique, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91405 Orsay, France.

The European Physical Journal. C, Particles and Fields

|June 6, 2017

Summary

This summary is machine-generated.

The Standard Model Effective Field Theory (SM EFT) is validated for the two-Higgs-doublet Model (2HDM) using LHC Higgs data. Constraints on SM EFT parameters translate to 2HDM parameter limits, guiding future Higgs coupling measurements.

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Area of Science:

High Energy Physics
Particle Physics
Quantum Field Theory

Background:

The Standard Model Effective Field Theory (SM EFT) is a low-energy approximation of more fundamental theories.
The two-Higgs-doublet Model (2HDM) is a popular extension of the Standard Model that includes additional Higgs bosons.

Purpose of the Study:

To assess the validity of the SM EFT as a low-energy description of the 2HDM.
To establish a method for translating constraints from Higgs data in the SM EFT to the parameters of the 2HDM.
To identify optimal Higgs boson couplings for improving fits to current experimental data.

Main Methods:

Utilizing up-to-date Higgs signal strength measurements from the Large Hadron Collider (LHC).
Deriving a likelihood function for Wilson coefficients of dimension-6 operators in the SM EFT Lagrangian.
Matching the 2HDM to the SM EFT to relate their parameters and constraints.

Main Results:

The procedure for translating SM EFT constraints to 2HDM parameters is valid under specific conditions.
Improving the fit to current Higgs data requires simultaneously increasing the top Yukawa coupling, decreasing the bottom Yukawa coupling, and introducing a Higgs-gluon contact interaction.
These modifications can be achieved within a 2HDM incorporating new colored particles.

Conclusions:

The SM EFT provides a robust framework for analyzing the 2HDM with current LHC Higgs data.
Future experimental efforts should focus on precise measurements of Higgs couplings to top quarks, bottom quarks, and gluons.
The 2HDM with new colored particles offers a potential explanation for the observed Higgs coupling patterns.