COSMOLOGICAL IMPLICATIONS OF DYNAMICAL SUPERSYMMETRY BREAKING

We provide a taxonomy of dynamical supersymmetry-breaking theories, an d discuss the cosmological implications of the various types of models . Models in which supersymmetry breaking is produced by chiral superfi elds which only have interactions of gravitational strength (e.g., str ing theory moduli) are inconsistent with standard big bang nucleosynth esis unless the gravitino mass is greater than similar to 3X10(4) GeV. This problem cannot be solved by inflation. Models in which supersymm etry is dynamically broken by renormalizable interactions in flat spac e have no such cosmological problems. Supersymmetry can be broken eith er in a hidden or the visible sector. However, hidden sector models su ffer from several naturalness problems and have difficulties in produc ing an acceptably large gluino mass.