Abstract
We review the stabilisation of complex structure moduli in Type IIA orientifolds, especially on with discrete torsion, via deformations of 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.
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