Varying Couplings From Orbifold GUTs
Filipe Paccetti Correia, Michael G. Schmidt, Zurab Tavartkiladze
TL;DR
This paper explores how gauge couplings vary over time in orbifold GUT models due to changes in extra dimension size, impacting unification and coupling constants.
Contribution
It introduces 5D orbifold GUT scenarios showing how extra dimensions influence gauge coupling variation and unification, aligning models with experimental data.
Findings
KK states affect gauge coupling running
Models achieve low scale unification
Variation of (M_Z) is suppressed
Abstract
We discuss the variation of gauge couplings in time in the framework of orbifold constructions, due to a change of the extra compact dimension's size. Models with gauge coupling unification allow to estimate the variation of the strong coupling constant and to relate it to a variation of . The extra-dimensional construction turns out to be crucial for the model to be compatible with data. Within the presented 5D scenarios, the tower of KK states significantly affects gauge coupling running, leads to low scale unification, and provides a suppression of the variation.
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Taxonomy
TopicsBlack Holes and Theoretical Physics · Noncommutative and Quantum Gravity Theories · Homotopy and Cohomology in Algebraic Topology