PoS - Proceedings of Science
Volume 455 - International Conference on Particle Physics and Cosmology (ICPPCRubakov2023) - Parallel session Gravity and its modifications
Quartic Horndeski-Cartan theories: a review on the stability of nonsingular cosmologies
M. Valencia-Villegas
Full text: pdf
Pre-published on: April 11, 2024
Published on: May 17, 2024
We briefly review recent progress in Horndeski theory (generalized Galileons) on a spacetime with torsion and the implications for the stability of the cosmological background against the graviton and the scalar mode. We highlight a critical modification of a well known NO-GO theorem that holds for nonsingular cosmological solutions in the torsionless theory. We show that these results trivially extend to a broader family of Lagrangians containing the contraction of the torsionful higher derivative terms - typical of Horndeski - with the fully antisymmetric tensor.
DOI: https://doi.org/10.22323/1.455.0033
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