Key points are not available for this paper at this time.
The infinite class of massless spin-1 actions formed from the two algebraic invariants Fmu nu Fmu nu , Fmu nu *Fmu nu which allow a supersymmetric extension is derived. It is shown that (to second nonlinear order at least) these extensions all have causal propagation, even though only one of them (Born-Infeld) was causal before supersymmetrisation.
Deser et al. (Tue,) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: