Description
Title: Deformations, Moduli Stabilisation and Loop-Corrected Gauge Couplings for Particle Physics on D-Branes
MSSM and GUT spectra on D-branes in toroidal orbifold backgrounds provide a class of string vacua, where geometric properties and their effects on physical couplings can be studied in detail. I will discuss how twisted deformation moduli are stabilised by the mere presence of D-branes, while others appear as flat directions, on which tree-level gauge couplings can depend. Their effects have to be weighted against the one-loop threshold corrections to gauge couplings, whose size in turn depends on Kähler moduli, which under certain conditions can give rise to LARGE volumes.
