Abstract
We study the process of spontaneous R parity breaking in minimal stringy models. In these models the top quark mass is bounded from below to allow the spontaneous breaking of SU (2) L × U (1) Y. On the other hand the requirement of stability for the neutral potential which is sufficient to avoid R parity breaking, gives us an upper bound. Allowed values for the top quark mass remain between 70 and 95 GeV, if supersymmetry breaking is triggered by gaugino masses.
Published Version
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