Deforming D-brane models on $T^6/({\mathbb{Z}}_2\times {\mathbb{Z}}_{2M})$ orbifolds

Abstract

We review the stabilisation of complex structure moduli in Type IIA orientifolds, especially on $T^6/({\mathbb{Z}}_2\times {\mathbb{Z}}_6^{\prime }\times \Omega \mathcal{R})$ with discrete torsion, via deformations of ${\mathbb{Z}}_2\times {\mathbb{Z}}_2$ orbifold singularities. While D6-branes in SO(2N) and USp(2N) models always preserve supersymmetry and thus give rise to flat directions, in an exemplary Pati-Salam model with only U(N) gauge groups ten out of the 15 deformation moduli can be stabilised at the orbifold point.

2 pages, contribution to the proceedings of "The String Theory Universe" workshop in Leuven, 7-11 Sept 2015