The "landscape" of Pati--Salam heterotic superstring vacua

Details The "landscape" of Pati--Salam heterotic superstring vacua The "landscape" of Pati--Salam heterotic superstring vacua

2010-03-01

arxiv.org/abs/1003.0458v1

Physics

High Energy Physics

High Energy Physics - Theory

4 pages, 2 figues, Presented at "School and Workshops on Cosmology and Strings: Theory-Cosmology-Phenomenology" (CORFU2009), S

Scientific paper

The main aspects of a recently developed method for classification of heterotic superstring vacua in the Free Fermionic Formulation are presented. Using these techniques we classify a big number of approximately $10^{15}$ heterotic string vacua with Pati--Salam, SU(4)x{SU(2)}_Lx{SU(2)}_R gauge symmetry with respect to their main phenomenological features as the number of families, Pati--Salam breaking Higgs, Standard Model Higgs doublets, additional triplets and exotic charge states. We identify an interesting subclass of these vacua, approximately one to one million, whose massless spectrum is completely free of fractionally charge states.

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