Precision Higgs Couplings in Neutral Naturalness Models: an Effective Field Theory Approach

TL;DR

This paper studies how Higgs coupling measurements can constrain neutral naturalness models, using an effective field theory approach to connect model parameters with collider observables and explore the potential reach of future experiments.

Contribution

It develops a framework to derive dimension-six operators from neutral naturalness models and assesses collider sensitivity to new physics scales up to around 2.8 TeV.

Findings

Collider measurements can probe new physics up to 2.7-2.8 TeV.

Inclusion of Higgs invisible decays enhances sensitivity.

Effective field theory links model structure to observable deviations.

Abstract

The Higgs sector in neutral naturalness models provides a portal to the hidden sectors, and thus measurements of Higgs couplings at current and future colliders play a central role in constraining the parameter space of the model. We investigate a class of neutral naturalness models, in which the Higgs boson is a pseudo-Goldstone boson from the universal SO(N)/SO(N-1) coset structure. Integrating out the radial mode from the spontaneous global symmetry breaking, we obtain various dimension-six operators in the Standard Model effective field theory, and calculate the low energy Higgs effective potential with radiative corrections included. We perform a chi-square fit to the Higgs coupling precision measurements at current and future colliders and show that the new physics scale could be explored up to 2.7 (2.8) TeV without (with) the Higgs invisible decay channels at future Higgs factories.