We explore a "fertile patch" of the heterotic landscape based on a Z6 -II orbifold with SO(10) and E6 local GUT structures. We search for models allowing for the exact MSSM spectrum. Our result is that of order 100 out of a total 3 × 104 inequivalent models satisfy this requirement. © 2006 Elsevier B.V. All rights reserved.
Lebedev, O., Nilles, H. P., Raby, S., Ramos-Sánchez, S., Ratz, M., Vaudrevange, P. K. S., & Wingerter, A. (2007). A mini-landscape of exact MSSM spectra in heterotic orbifolds. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 645(1), 88–94. https://doi.org/10.1016/j.physletb.2006.12.012