April 12, 2019
TITLE: F-Theory and Spin7 Manifolds
We discuss some recent progress in understanding 4D vacua obtained from F-theory on Spin(7) manifolds. Such backgrounds provide a potentially attractive way to avoid fine-tuning to cancel zero point energies. We present a general proposal for cosmological solutions in this framework, and also develop the physical formalism of local Spin(7) geometries containing a four-manifold of ADE singularities.
Based on work with C. Lawrie, L. Lin, and G. Zoccarato, hep-th/1811.01959
and C. Lawrie, L. Lin, J. Sakstein and G. Zoccarato, hep-th/1901.10489.