Supersymmetry, Superspace, Superfields

We exhibit elementary facts about 4D supersymmetric theories with emphasis on N = 1 supersymmetry and argue that the adequate language to deal with this type of theories is the superspace approach. Contents: From symmetries to super-symmetry; Basic features of supersymmetry; Superspace and superelds; 1D supersymmetry as the simplest example.

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