Localizing the rigid supersymmetry of a free Wess–Zumino model produces a derivative of the supersymmetry parameter multiplying the supercurrent. The Noether gauging procedure introduces a gravitino coupled to this current. Closure also requires a vierbein, the Einstein-Hilbert action, covariant matter kinetic terms and higher-order interactions. The leading gravitino-matter coupling contains the derivative of the scalar, not its undifferentiated value.
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