A Realistic Unified Gauge Coupling from the Micro-Landscape of Orbifold GUTs

Understand

We consider 5-dimensional supersymmetric field theories where supersymmetry is broken by the Scherk-Schwarz mechanism (or, equivalently, by the F-term VEV of the radion).

• In such models, the radion effective potential is calculable in terms of the 5d gauge coupling, the UV cutoff of the 5d field theory, and the field content.
• We provide simple, explicit formulae for the leading part of the two-loop effective potential.
• Our analysis applies in particular to 5d orbifold GUTs motivated by heterotic orbifold models.