Improved vacuum stability in a five dimensional model

TL;DR

This paper investigates how a five-dimensional model with bulk bosons and brane-localized matter affects the stability of the Higgs vacuum, showing improved stability conditions compared to the Standard Model.

Contribution

It introduces a five-dimensional framework that modifies Higgs self-coupling evolution, leading to enhanced vacuum stability over conventional models.

Findings

Higgs self-coupling evolution is stabilized in the five-dimensional model.

The model predicts a higher ultraviolet cutoff than the Standard Model.

Flavor mixing evolution is analyzed within this extra-dimensional context.

Abstract

In this paper we study the renormalization effects of the quark flavor mixings and the Higgs self- coupling in a five dimensional model where the boson fields are propagating in the bulk whilst the matter fields are localized to the brane. We first explore the evolution behaviors for the Cabibbo- Kobayashi-Maskawa matrix in this scenario. Then, in light of the recent LHC bounds on the Higgs mass, we find that the Higgs self-coupling evolution has an improved vacuum stability condition, which is in contrast with that of Standard Model and the Universal Extra Dimension scenario, where the theory has a much lower ultraviolet cut-off.