The Slow Gravitino

Understand

When the supersymmetry breaking sector is a fluid background, Lorentz invariance is broken spontaneously.

• The super-Higgs mechanism leads to a gravitino Lagrangian with Lorentz symmetry violating terms.
• We analyse the resulting field equations and constraints.
• We identify the physical spin 3/2 and spin 1/2 helicity states, derive their equations of motion and construct the propagator.