Geometric Formulation of Generalized Root- TT¯ Deformations

We develop a generic geometric formalism that incorporates both TT¯-like and root-TT¯-like deformations in arbitrary dimensions. This framework applies to a wide family of stress-energy tensor perturbations and encompasses various well-known field theories. Building upon the recently proposed correspondence between Ricci-based gravity and TT¯-like deformations, we further extend this duality to include root-TT¯-like perturbations. This refinement extends the potential applications of our approach and contributes to a deeper exploration of the interplay between stress tensor perturbations and gravitational dynamics. Among the various original outcomes detailed in this Letter, we have also obtained a deformation of the flat Jackiw-Teitelboim gravity action. Published by the American Physical Society 2024