2003/07/03 by Alon E. Faraggi, Faraggi, Alon E.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High Energy Physics - Theory (hep-th) #hep-ph #hep-th
paper · pdf · doi:10.48550/arxiv.hep-th/0307037
11 pages. 3 figures. Standard Latex & Rinton-P9x6.cls To appear in the proceedings of SUGRA 20 conference, Boston, 17-21 March 2003
arxiv created 2003/07/03 · arxiv updated 2009/11/30
The Standard Model data suggests that the quantum gravity vacuum should accommodate two pivotal ingredients. The existence of three chiral generations and their embedding in chiral 16 SO(10) representations. The Z2XZ2 orbifolds are examples of perturbative heterotic string vacua that yield these properties. The exploration of these models in the nonperturbative framework of M-theory is discussed. A common prediction of these contructions is the existence of super-heavy meta-stable states due to the Wilson-line breaking of the GUT symmetries. Cosmic ray experiments in the forthcoming years offer an exciting experimental window to the phenomenology of such states.