Gauge coupling unification and the stability of the Higgs vacuum are among two of the cherished features of low-energy supersymmetric models. Though low-energy supersymmetry is still viable, it could be that supersymmetry is manifest only at very high energies. If this is the case, it is a legitimate question whether any or all of the problems with cures normally attributed to weak-scale supersymmetry can still be resolved. We argue that with the exception of the hierarchy problem, gauge coupling unification can occur in the context of supersymmetric SO(10) GUT when supersymmetry is broken above the inflationary scale, while the stability of the Higgs vacuum is ensured. Surprisingly, those two are achieved by requiring the presence of TeV-scale new physics which is also responsible for radiative electroweak symmetry breaking as well as a dark matter candidate. This weak-scale physics takes the form of a complex weak triplet scalar with zero hypercharge, originating from the 210 Higgs field breaking SO(10).
|Parallel Session||Supersymmetry: Models, Phenomenology and Experimental Results|