Minimalism in Inflation Model Building

摘要

In this paper we demand that a successfull inflationary scenario shouldfollow from a model entirely motivated by particle physics considerations. Weshow that such a connection is indeed possible within the framework of concretesupersymmetric Grand Unified Theories where the doublet-triplet splittingproblem is naturally solved. The Fayet-Iliopoulos D-term of a gauge$U(1)_{\xi}$ symmetry, which plays a crucial role in the solution of thedoublet-triplet splitting problem, simultaneously provides a built-ininflationary slope protected from dangerous supergravity corrections.