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arXiv · 2603.01884

Growth factor in teleparallel Gauss-Bonnet gravity

Shivam Kumar Mishra·Jackson Levi Said·B. Mishra
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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 $\Lambda$CDM cosmology. In this work, we explore three competing cosmological models in $F(T,T_G)$ 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 $\Lambda$CDM cosmology for certain ranges of model parameters. Interestingly, the models can arrive at the same level of growth as $\Lambda$CDM while producing possible deviations at intermediate scales.

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Shivam Kumar Mishra, Jackson Levi Said, B. Mishra. 2026-03-02. Growth factor in teleparallel Gauss-Bonnet gravity. https://doi.org/10.1016/j.physletb.2026.140807

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