SPONTANEOUS CP VIOLATION IN THE SUPERSYMMETRIC HIGGS SECTOR

Spontaneous CP violation in the minimal supersymmetric standard model with a gauge singlet and a cubic superpotential is examined. Although the tree-level Higgs potential conserves CP, it is shown that with the inclusion of the one-loop top-quark radiative effects CP may be broken spontaneously. The CP-violating minimum requires two neutral (h1, h2) and one charged (H+/-) Higgs boson to be relatively light with M(h1) + M(h2) less than or similar to 100 GeV and m(H)+/- less than or similar to 110 GeV. The electric dipole moment of the electron is in the observable range of (1/3 to 3) X 10(-27) e cm.