Superheavy supersymmetry from scalar mass - A parameter fixed points

In supersymmetric models, the well-known tension between naturalness and experimental constraints is relieved if the squarks and sleptons of the first two generations are superheavy, with masses m(heavy) greater than or similar to 10 TeV, and all other superpartners are Light, with masses m(light) less than or similar to 1 TeV. We show that even if all scalar masses and trilinear A parameters are of order m(heavy) at some high scale, a hierarchy of m(heavy)(2)/m(light)(2) similar to 400 may be generated dynamically through renormalization group evolution. The required high energy relations are consistent with grand unification, or, alternatively, may be realized in moduli-dominated supersymmetry-breaking scenarios. (C) 2000 Published by Elsevier Science B.V. All rights reserved.