Gauge Unification at the String Scale and Fermion Masses
B. C. Allanach, S. F. King
Abstract
In the context of the minimal supersymmetric standard model (MSSM), we discuss the introduction of exotic matter below the string scale MX in order to achieve gauge unification at MX (a constraint of a large class of string models). The possible types of exotic matter that can realise this are investigated and its effect on the top quark mass mt is presented. The implementation of a theory of fermion masses which utilises the exotic matter is briefly discussed.
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