Soft Supersymmetry (SUSY) breaking refers to a set of mechanisms in particle physics that allow supersymmetric partners of known particles to have different masses without eliminating the essential symmetry properties of supersymmetry itself. In a supersymmetric theory, every known particle has a corresponding partner, or superpartner, with differing spin properties. However, these superpartners are not observed in experiments, which suggests that supersymmetry must be broken.
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