Singlet Extensions of the MSSM with Z4R Symmetry

Abstract EN

We discuss singlet extensions of the MSSM with Z4R symmetry.

We show thatholomorphic zeros can avoid a potentially large coefficient of the term linearin the singlet.

The emerging model has both an effective μ term and asupersymmetric mass term for the singlet μN which are controlledby the gravitino mass.

The μ term turns out to be suppressed against μN by about one or two orders of magnitude.

We argue that thisclass of models might provide us with a solution to the little hierarchyproblem of the MSSM.