How higher-spin gravity surpasses the spin-two barrier - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Reviews of Modern Physics Année : 2012

How higher-spin gravity surpasses the spin-two barrier

Résumé

Aiming at nonexperts, the key mechanisms of higher-spin extensions of ordinary gravities in four dimensions and higher are explained. An overview of various no-go theorems for low-energy scattering of massless particles in flat spacetime is given. In doing so, a connection between the S-matrix and the Lagrangian approaches is made, exhibiting their relative advantages and weaknesses, after which potential loopholes for nontrivial massless dynamics are highlighted. Positive yes-go results for non-Abelian cubic higher-derivative vertices in constantly curved backgrounds are reviewed. Finally, how higher-spin symmetry can be reconciled with the equivalence principle in the presence of a cosmological constant leading to the Fradkin-Vasiliev vertices and Vasiliev's higher-spin gravity with its double perturbative expansion (in terms of numbers of fields and derivatives) is outlined.

Dates et versions

hal-00790769 , version 1 (21-02-2013)

Identifiants

Citer

Xavier Bekaert, Nicolas Boulanger, Per A. Sundell. How higher-spin gravity surpasses the spin-two barrier. Reviews of Modern Physics, 2012, 84, pp.987-1009. ⟨10.1103/REVMODPHYS.84.987⟩. ⟨hal-00790769⟩
67 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More