RG running in a minimal UED model in light of recent LHC Higgs mass bounds

TL;DR

This paper investigates how recent LHC Higgs mass bounds influence the renormalization group evolution of parameters in a minimal universal extra dimensions model, deriving bounds on the cutoff scale and implications for gauge unification.

Contribution

It provides new constraints on the cutoff scale of UED models based on Higgs mass bounds and analyzes the impact on the running of physical parameters.

Findings

Higgs mass bounds restrict the cutoff scale of UED models.

The running of fermion masses and CKM matrix is significantly limited.

Gauge coupling running is insufficient for unification at the cutoff scale.

Abstract

We study how the recent ATLAS and CMS Higgs mass bounds affect the renormalization group running of the physical parameters in universal extra dimensions. Using the running of the Higgs self-coupling constant, we derive bounds on the cutoff scale of the extra-dimensional theory itself. We show that the running of physical parameters, such as the fermion masses and the CKM mixing matrix, is significantly restricted by these bounds. In particular, we find that the running of the gauge couplings cannot be sufficient to allow gauge unification at the cutoff scale.