Extra-dimensional relaxation of the upper limit of the lightest supersymmetric neutral Higgs mass

TL;DR

Embedding supersymmetry in extra dimensions can significantly raise the upper limit of the lightest Higgs boson mass beyond the standard 135 GeV, potentially reaching 200-300 GeV.

Contribution

This paper demonstrates that extra-dimensional models can relax the Higgs mass upper limit in supersymmetry, using effective potential calculations with Kaluza-Klein towers.

Findings

Higgs mass upper limit can be increased to around 200 GeV with one extra dimension.

Higgs mass upper limit can reach approximately 300 GeV with two extra dimensions.

Extra dimensions have a substantial impact on Higgs mass predictions in supersymmetric models.

Abstract

The upper limit on the mass of the lightest CP-even neutral Higgs in the minimal supersymmetric standard model is around 135 GeV for soft supersymmetry breaking masses in the 1 TeV range. We demonstrate that this upper limit may be sizably relaxed if supersymmetry is embedded in extra dimensions. We calculate, using the effective potential technique, the radiative corrections to the lightest Higgs mass induced by the Kaluza-Klein towers of quarks and squarks with one and two compactified directions. We observe that the lightest Higgs may comfortably weigh around 200 GeV (300 GeV) with one (two) extra dimension(s).