2013/04/30 by Sergei V. Ketov, Takahiro Terada
Physics and Astronomy · #Action (physics) #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Effective action #Embedding #Generalization #Gravitation #Induced gravity #Noncommutative and Quantum Gravity Theories #Supergravity #Superstring theory #Tensor (intrinsic definition) #gr-qc #hep-th
paper · pdf · doi:10.1007/jhep07(2013)127
published as JHEP07(2013)127 · 15 pages, minor revision for version 2 (published version)
openalex publication_date 2013/07/01 · arxiv created 2013/07/23 · arxiv updated 2013/07/24 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We extend the f(R) gravity action by including a generic dependence upon the Weyl tensor, and further generalize it to supergravity by using the super-curvature (R) and super-Weyl (W) chiral superfields in N=1 chiral curved superspace. We argue that our (super)gravitational actions are the meaningful extensions of the phenomenological f(R) gravity and its locally supersymmetric generalization towards their UV completion and their embedding into superstring theories. The proposed actions can be used for study of cosmological perturbations and gravitational instabilities due to a nonvanishing Weyl tensor in gravity and supergravity.