Parameter Space Investigations of Free Fermionic Heterotic Models
Abstract
I survey the parameter space of NAHE-based free fermionic heterotic string models. First, I discuss flat directions of the low energy effective field theories and show that D-flat directions need not be isomorphic to gauge invariant superpotential terms. Next, I review recent studies of three generation SU(3)C x SU(2)L x U(1)Y, SU(3)C x SU(2)L x SU(2)R x U(1)B-L, SU(4)C x SU(2)L x U(1)Y', and flipped SU(5) models, constructed by Wilson breaking of the underlying SO(10) observable sector gauge group of the NAHE Z2 x Z2 basis. Based on talk presented at the First International Conference on String Phenomenology.
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