摘要：We discuss singlet extensions of the MSSM with symmetry. We show that
holomorphic zeros can avoid a potentially large coefficient of the term linear
in the singlet. The emerging model has both an effective term and a
supersymmetric mass term for the singlet which are controlled
by the gravitino mass. The term turns out to be suppressed against by about one or two orders of magnitude. We argue that this
class of models might provide us with a solution to the little hierarchy
problem of the MSSM.
