Revisiting one-loop corrections to the trilinear Higgs boson self-coupling in the Inert Doublet Model

TL;DR

This paper examines one-loop radiative corrections to the Higgs boson self-coupling within the Inert Doublet Model, revealing potential deviations over 100% from Standard Model predictions under various constraints.

Contribution

It provides a detailed calculation of the triple Higgs coupling at one-loop level in the Inert Doublet Model, including all relevant constraints and potential large deviations from the Standard Model.

Findings

Deviations in Higgs self-coupling can exceed 100%.

Radiative corrections significantly impact the Higgs self-coupling predictions.

Constraints from dark matter and Higgs decay bounds are incorporated.

Abstract

We investigate predictions of the trilinear Higgs self-coupling with radiative corrections in the context of the Inert Doublet Model. The triple Higgs vertex is computed at the one-loop level based on the on-shell renormalization scheme. We calculate its possible deviation from the predictions within the standard model, taking into account all relevant theoretical and experimental constraints, including dark matter searches and the latest bounds on the branching fraction of the Higgs boson decaying to invisible particles. By scanning the model's parameter space, we find that the deviation in the triple Higgs boson self-coupling from standard model expectations can be substantial, exceeding 100\% in certain regions of the parameter space.