Three-dimensional hypergravity theories and semigroup expansion method

doi:10.1007/JHEP08(2023)215

Three-dimensional hypergravity theories and semigroup expansion method

2023-08-31

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DOI：10.1007/JHEP08(2023)215

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In this work, we apply the semigroup expansion method of Lie algebras to construct novel and known three-dimensional hypergravity theories. We show that the expansion procedure considered here yields a consistent way of coupling different three-dimensional Chern-Simons gravity theories with massless spin-5/2 gauge fields. First, by expanding the osp (1|4) superalgebra with a particular semigroup a generalized hyper-Poincare algebra is found. Interestingly, the hyper-Poincare and hyper-Maxwell algebras appear as subalgebras of this generalized hypersymmetry algebra. Then, we show that the generalized hyper-Poincare CS gravity action can be written as a sum of diverse hypergravity CS Lagrangians. We extend our study to a generalized hyper-AdS gravity theory by considering a different semigroup. Both generalized hyperalgebras are then found to be related through an Inonu-Wigner contraction which can be seen as a generalization of the existing vanishing cosmological constant limit between the hyper-AdS and hyper-Poincare gravity theories.

Keywords:

Chern-Simons Theories

Higher Spin Symmetry

Higher Spin Gravity

Supergravity Models

Three-dimensional hypergravity theories and semigroup expansion method

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