= Technical hierarchy problem
The technical <hierarchy problem> asks why a small mass scale, once chosen, remains stable under quantum corrections from much larger scales. A symmetry can protect this radiative stability without explaining the numerical origin of the scale separation. For a fundamental <scalar mass>, heavy thresholds often give additive corrections proportional to the heavy mass squared; <supersymmetric cancellation of quadratic divergences> supplies one protection mechanism when supersymmetry breaking is sufficiently soft.
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