The slow gravitino

Karim Benakli*, Luc Darmé, Yaron Oz

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


Abstract: 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. The violation of Lorentz symmetry implies that the longitudinal mode has a non-relativistic dispersion relation, whose speed is lower than the speed of light. We briefly comment on possible implications to gravitino cosmology and phenomenology.

Original languageEnglish
Article number121
JournalJournal of High Energy Physics
Issue number10
StatePublished - Oct 2014


  • Supersymmetric effective theories
  • Supersymmetry breaking


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