Gauge Threshold Corrections in Warped Geometry

TL;DR

This paper derives explicit one-loop gauge threshold corrections in warped 5D theories, highlighting their importance for gauge coupling unification in models with sizable warping.

Contribution

It provides the first comprehensive expressions for gauge threshold corrections in generic warped 5D models, including effects of bulk symmetry breaking and mass mixing.

Findings

Explicit formulas for one-loop gauge thresholds in warped geometries.

Inclusion of bulk symmetry breaking and mass mixing effects.

Implications for gauge coupling unification in warped models.

Abstract

We discuss the Kaluza-Klein threshold correction to low energy gauge couplings in theories with warped extra-dimension, which might be crucial for the gauge coupling unification when the warping is sizable. Explicit expressions of one-loop thresholds are derived for generic 5D gauge theory on a slice of AdS_5, where some of the bulk gauge symmetries are broken by orbifold boundary conditions and/or by bulk Higgs vacuum values. Effects of the mass mixing between the bulk fields with different orbifold parities are included as such mixing is required in some class of realistic warped unification models.