Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1995-07-28
Physics
High Energy Physics
High Energy Physics - Theory
7 pages, Latex, no figures. Talk at Susy 95. Paris, May 1995
Scientific paper
Recent developments about the construction of standard $SO(10)$ and $SU(5)$ grand unified theories from 4-dimensional superstrings are presented. Explicit techniques involving higher level affine Lie algebras, for obtaining such stringGUTs from symmetric orbifolds are discussed. Special emphasis is put on the different constraints and selection rules for model building in this string framework, trying to disentangle those which are generic from those depending on the orbifold construction proposed. Some phenomenological implications from such constraints are briefly discussed.
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