2 problems

Let $N=2k$ be even, and consider the full supersymmetrization of the $D=4$ Galilei superalgebra, meaning that the Galilean generators and Abelian central charges are expressed as b…

The $D=4$ Galilei superalgebra is obtained by a nonrelativistic contraction of an extended Poincaré superalgebra, and its additional central charges arise in the supersymmetrizatio…