The Goldstino Field in Linear and Nonlinear Realizations of Supersymmetry

Understand

A Goldstino field in the nonlinear realization of supersymmetry is constructed from an appropriate chiral super-multiplet of the linear theory, in general O'Raifeataigh-like models.

• The linear theories can thus be reformulated into their nonlinear versions, via the standard procedure.
• The Goldstino field disappears totally from the original Lagrangian in the process, but reemerges in the Jacobian of the transformation and covariant derivatives.
• Vertices with Goldstino fields carry at least one space-time derivative, as one would have expected.