Einstein-Cartan pseudoscalaron inflation

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.

19 pages, 7 figures. Some references added. Version conformal to the published one

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Cited by in corpus (15)

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• Inflation in Weyl-invariant Einstein-Cartan gravity
• Natural Metric-Affine Inflation
• Inflation and reheating in quadratic metric-affine gravity with derivative couplings
• Starobinsky Inflation and beyond in Einstein-Cartan Gravity
• General Einstein-Cartan quadratic gravity with derivative couplings
• Introduction to the number of $e$-folds in slow-roll inflation
• $\tilde{\xi }$-attractors in metric-affine gravity
• Effect of Torsion on Neutron Star Structure in Einstein-Cartan Gravity
• Toward a gravitational network: Bridging metric-affine gravity and no-scale supergravity
• Evolution of the early universe in Einstein-Cartan theory
• Dynamically induced spin-2 mass in a Weyl-invariant framework
• Reheating in geometric Weyl-invariant Einstein-Cartan gravity
• Twisting inflation to sub-Planckian axion decay constants
• Inflationary assessment of $F(\mathcal{R},\tilde{\mathcal{R}})$ Einstein-Cartan models