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An off-shell formulation of higher-spin gravity

Nicolas Boulanger (Université de Mons)


We review a construction giving a (non-standard) action principle for Vasiliev's fully nonlinear equations of motion for bosonic higher spin gauge fields in four spacetime dimensions. It is based on a generalized Hamiltonian sigma model and produces the expected amplitudes related to the 3D free O(N) model. We then proceed with the BRST-BV quantization following the Alexandrov-Kontsevich-Schwarz-Zaboronsky approach.