Version 1
: Received: 28 November 2022 / Approved: 29 November 2022 / Online: 29 November 2022 (07:04:06 CET)
Version 2
: Received: 1 January 2023 / Approved: 4 January 2023 / Online: 4 January 2023 (02:16:15 CET)
Das, C.; Huitu, K.; Kärkkäinen, T.J. The Higgs Trilinear Coupling and the Scale of New Physics for the SM-Axion-Seesaw-Higgs Portal Inflation (SMASH) Model. Universe2023, 9, 43.
Das, C.; Huitu, K.; Kärkkäinen, T.J. The Higgs Trilinear Coupling and the Scale of New Physics for the SM-Axion-Seesaw-Higgs Portal Inflation (SMASH) Model. Universe 2023, 9, 43.
Das, C.; Huitu, K.; Kärkkäinen, T.J. The Higgs Trilinear Coupling and the Scale of New Physics for the SM-Axion-Seesaw-Higgs Portal Inflation (SMASH) Model. Universe2023, 9, 43.
Das, C.; Huitu, K.; Kärkkäinen, T.J. The Higgs Trilinear Coupling and the Scale of New Physics for the SM-Axion-Seesaw-Higgs Portal Inflation (SMASH) Model. Universe 2023, 9, 43.
Abstract
In the extended scalar sector of the SMASH (Standard Model - Axion - Seesaw - Higgs portal inflation) framework, we conduct a phenomenological investigation of the observable effects. In a suitable region of the SMASH scalar parameter spaces, we resolve the vacuum metastability issue and discuss the one-loop correction to the triple Higgs coupling λHHH. The λHHH and SM Higgs quartic coupling λH corrections are found to be proportional to the threshold correction. A large λHHH correction (≳5%) implies vacuum instability in the model and thus limits the general class of theories that use threshold correction. We perform a full two-loop renormalization group analysis of the SMASH model.
Keywords
Higgs portal inflation; Beyond the Standard Model; SMASH; Higgs triple coupling; Higgs trilinear coupling
Subject
Physical Sciences, Particle and Field Physics
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.