Fate of the scalar quartic couplings in the inert models
Year: 2025
Type: article
Abstract: In this article we consider three inert models, namely the Inert Singlet Model (ISM), Inert Triplet Model (ITM), and Inert Doublet Model (IDM) as beyond Standard Model scenarios, and look into the running of the scalar quartic couplings at one- and two-loop levels. Interestingly, the Landau poles at one-loop and Fixed Points at two-loop have been observed for these scenarios, very similar to the ϕ 4 theory, which is absent in the Standard Model. The role of Higgs portal couplings in attaining these features has been examined. For inert singlet and triplet models, the portal couplings give rise to terms without any residual phases, enhancing this Fixed Point behavior. In the case of the Inert Doublet Model, λ 4 , 5 terms which have the residual phases, spoil this behavior. Finally, we consider perturbative unitarity constraints to put limits on the scalar quartic couplings for various perturbativity scales in both one- and two-loop. Larger portal couplings, i.e., ≳ 2 , get strong perturbative bounds as low as 10 2 − 3 GeV . Uncertainties of the Fixed Points, and phenomenological aspects of such scenarios are also briefed.
DOI: 10.1103/pmv7-cbqz
Authors: Priyotosh Bandyopadhyay, Pram Milan P. Robin
Institution: Indian Institute of Technology Hyderabad
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Funder: Ministry of Education, India
OpenAlex ID: W4411339763