Growth factor in teleparallel Gauss-Bonnet gravity
2026/03/31 by Shivam Kumar Mishra, Jackson Levi Said, B. Mishra
Physics and Astronomy · #gr-qc
paper · pdf · doi:10.1016/j.physletb.2026.140807
published as Phys. Lett. B 880 (2026) 140807 · Version Published in Physics Letters B
arxiv created 2026/08/06 · arxiv updated 2026/08/07
Abstract
Teleparallel gravity offers a competing geometric framework on which to build cosmological models. The Gauss-Bonnet invariant captures key aspects of the underlying geometry that has been shown to be an interesting way to form cosmological models beyond ΛCDM cosmology. In this work, we explore three competing cosmological models in F(T,TG) cosmology in the context of their evolution of the growth of structure in the Universe. This is a core test of the viability of any cosmological model. In our work, we show how these models are qualitatively competitive with ΛCDM cosmology for certain ranges of model parameters. Interestingly, the models can arrive at the same level of growth as ΛCDM while producing possible deviations at intermediate scales.
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