Michael Blaszczyk

A Z2xZ2 standard model

We present a Z_2 x Z_2 orbifold compactification of the E_8 x E_8 heterotic string which gives rise to the exact chiral MSSM spectrum. The GUT breaking SU(5) to SU(3)_C x SU(2)_L x U(1)_Y is realized by modding out a freely acting symmetry. This ensures precision gauge coupling unification. Further, it allows us to break the GUT group without switching on flux in hypercharge direction, such that the standard model gauge bosons can remain massless when the orbifold singularities are blown up. The model has vacuum configurations with matter parity, a large top Yukawa coupling and other phenomenologically appealing features.

A Z2×Z2 standard model

We present a Z_2 x Z_2 orbifold compactification of the E_8 x E_8 heterotic string which gives rise to the exact chiral MSSM spectrum. The GUT breaking SU(5) to SU(3)_C x SU(2)_L x U(1)_Y is realized by modding out a freely acting symmetry. This ensures precision gauge coupling unification. Further, it allows us to break the GUT group without switching on flux in hypercharge direction, such that the standard model gauge bosons can remain massless when the orbifold singularities are blown up. The model has vacuum configurations with matter parity, a large top Yukawa coupling and other phenomenologically appealing features.

Heterotic MSSM on a resolved orbifold

We construct an MSSM with three generations from the heterotic string compactified on a smooth 6D internal manifold using Abelian gauge uxes only. The compactification space is obtained as a resolution of the

A Z 2 × Z 2 standard model

{{{{T^6}}} \left/ {{{\mathbb{Z}_2} \times {\mathbb{Z}_2} \times {\mathbb{Z}_{2,{\text{free}}}}}} \right.}

Gauged Linear Sigma Models for toroidal orbifold resolutions

orbifold. The

Calabi-Yau compactifications of non-supersymmetric heterotic string theory

{\mathbb{Z}_{2,{\text{free}}}}