Supersymmetry is an attempt to enlarge the concept of Lie-Algebras. This attempt has been successful : conserved currents have been constructed in the framework of renormalizable field theories such that the conserved charges form a closed algebra only if commutators or anti-commutators are used respectively. Theories which possess such a symmetry have interesting properties, there is a remarkable cancellation of divergencies . Fields with different spin (and different statistic) are in the same multiplet, supersymmetries contain the Poincaré group in a non-trivial way.
KeywordsVector Field Symmetry Breaking Absolute Minimum Spontaneous Symmetry Breaking Higgs Mechanism
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