Einstein-Cartan pseudoscalaron inflation
arXiv:2309.11345 · doi:10.1140/epjc/s10052-024-12482-6
Abstract
We study a class of early universe cosmological models based on Einstein-Cartan gravity and including a higher derivative term corresponding to a power of the Holst scalar curvature. The resulting effective action is basically given by General Relativity and an additional neutral pseudoscalar field (the pseudoscalaron), unequivocally related to the corresponding components of the torsion, that necessarily acquire a dynamics. The induced pseudoscalaron potential provides a realistic inflationary phase together with a very rich postinflationary epoch, resulting by the coupling of the pseudoscalaron to ordinary matter.
arXiv comment19 pages, 7 figures. Some references added. Version conformal to the published one
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