Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2008-04-30
JHEP0806:018,2008
Physics
High Energy Physics
High Energy Physics - Theory
9 pages. Minor changes (typos and references added). Accepted in JHEP
Scientific paper
10.1088/1126-6708/2008/06/018
In all the odd dimensions which allow Majorana spinors, we consider a gravitational Lagrangian possessing local Poincare invariance and given by the dimensional continuation of the Euler density in one dimension less. We show that the local supersymmetric extension of this Lagrangian requires the algebra to be the maximal extension of the N=1 super-Poincare algebra. By maximal, we mean that in the right hand side of the anticommutator of the Majorana super charge appear all the possible central charges. The resulting action defines a Chern-Simons gauge theory for the maximal extension of the super-Poincare algebra. In these dimensions, we address the same problem for the AdS invariant gravity and we derive its supersymmetric extension for the minimal super-AdS algebra. The connection between both models is realized at the algebraic level through an expansion of their corresponding Lie super algebras. Within a procedure consistent with the expansion of the algebras, the local supersymmetric extension of the Poincare invariant gravity Lagrangian is derived from the super AdS one.
Hassaïne Mokhtar
Romo Mauricio
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