Extended $D=3$ Bargmann supergravity from a Lie algebra expansion
In this paper we show how the method of Lie algebra expansions may be used to obtain, in a simple way, both the extended Bargmann Lie superalgebra and the Chern-Simons action associated to it in three dimensions, starting from $D=3$, $\mathcal{N}=2$ superPoincaré and its corresponding Chern-Simons supergravity.
hep-th↗