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 pseudoscal...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2024-02-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-024-12482-6 |
| _version_ | 1797209134512209920 |
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| author | Alessandro Di Marco Emanuele Orazi Gianfranco Pradisi |
| author_facet | Alessandro Di Marco Emanuele Orazi Gianfranco Pradisi |
| author_sort | Alessandro Di Marco |
| collection | DOAJ |
| description | 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 from the coupling of the pseudoscalaron to ordinary matter. |
| first_indexed | 2024-03-07T14:44:39Z |
| format | Article |
| id | doaj.art-608808609e4b41cba3da182281a07ab6 |
| institution | Directory Open Access Journal |
| issn | 1434-6052 |
| language | English |
| last_indexed | 2024-04-24T09:49:52Z |
| publishDate | 2024-02-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-608808609e4b41cba3da182281a07ab62024-04-14T11:26:32ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522024-02-0184211610.1140/epjc/s10052-024-12482-6Einstein–Cartan pseudoscalaron inflationAlessandro Di Marco0Emanuele Orazi1Gianfranco Pradisi2Istituto Nazionale di Astrofisica, Istituto di Astrofisica e Planetologia Spaziali (INAF-IAPS)Escola de Ciência e Tecnologia and International Institute of Physics, Federal University of Rio Grande do Norte, Campus Universitario-Lagoa NovaUniversity of Rome “Tor Vergata” and INFN, Sezione di Roma “Tor Vergata”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 from the coupling of the pseudoscalaron to ordinary matter.https://doi.org/10.1140/epjc/s10052-024-12482-6 |
| spellingShingle | Alessandro Di Marco Emanuele Orazi Gianfranco Pradisi Einstein–Cartan pseudoscalaron inflation European Physical Journal C: Particles and Fields |
| title | Einstein–Cartan pseudoscalaron inflation |
| title_full | Einstein–Cartan pseudoscalaron inflation |
| title_fullStr | Einstein–Cartan pseudoscalaron inflation |
| title_full_unstemmed | Einstein–Cartan pseudoscalaron inflation |
| title_short | Einstein–Cartan pseudoscalaron inflation |
| title_sort | einstein cartan pseudoscalaron inflation |
| url | https://doi.org/10.1140/epjc/s10052-024-12482-6 |
| work_keys_str_mv | AT alessandrodimarco einsteincartanpseudoscalaroninflation AT emanueleorazi einsteincartanpseudoscalaroninflation AT gianfrancopradisi einsteincartanpseudoscalaroninflation |