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Einstein-Cartan pseudoscalaron inflation

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arxiv 2309.11345 v2 pith:VHIQML5E submitted 2023-09-20 hep-th astro-ph.COgr-qc

Alessandro Di Marco , Emanuele Orazi , Gianfranco Pradisi This is my paper · ORCID
classification hep-thastro-ph.COgr-qc
keywords pseudoscalaroncorrespondingeinstein-cartanresultingacquireactionadditionalbasically
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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.

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Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Inflation and Reheating by Dynamical Torsion

    hep-ph 2026-07 conditional novelty 6.0 of 10

    The dynamical-torsion inflaton decays via chiral anomalies and Yukawa-assisted three-body channels, yielding a reheating temperature of 10^5–10^7 GeV and testable CMB/GW predictions.

  2. Torsion induced current-scalaron coupling in Einstein-Cartan gravity

    hep-ph 2025-07 conditional novelty 6.0 of 10

    In Einstein-Cartan gravity, torsion-current couplings induce scalaron-current and scalaron Chern-Simons interactions, with explicit decay constants and a classification of their asymptotic behavior.

  3. The particle spectra of parity-violating theories: A less radical approach and an upgrade of PSALTer

    hep-th 2025-06 conditional novelty 6.0 of 10

    The authors derive a simpler no-ghost condition based on a kinetic matrix and release a parity-violating upgrade of PSALTer, demonstrating it on Einstein-Cartan gravity with two scalar modes.

  4. Inflationary assessment of $F(\mathcal{R},\tilde{\mathcal{R}})$ Einstein-Cartan models

    gr-qc 2025-12 conditional novelty 5.0 of 10

    Adding cubic Holst-invariant terms to F(R,R̃) Einstein-Cartan inflation models systematically lowers the predicted spectral index n_s and tensor-to-scalar ratio r, restoring data compatibility in parameter regions whe...

  5. Geometrical origin of inflation in Weyl-invariant Einstein-Cartan gravity

    gr-qc 2025-01 conditional novelty 4.0 of 10

    The scalar mode of Weyl-invariant Einstein-Cartan quadratic gravity yields the same inflationary potential as pseudoscalaron inflation and can fit CMB data for large parameter q.

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