Late vacuum choice and slow roll approximation in gravitational particle production during reheating
In the transition between inflation and reheating, the curvature scalar typically undergoes oscillations which have significant impact on the density of gravitationally produced particles. The commonly used adiabatic vacuum prescription for the extraction of produced particle spectra becomes a non-r...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión enviada para evaluación y publicación |
| Fecha de publicación: | 2023 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/350329 |
| Acceso en línea: | http://hdl.handle.net/10261/350329 https://api.elsevier.com/content/abstract/scopus_id/85169537711 |
| Access Level: | acceso abierto |
| Palabra clave: | Cosmology of Theories beyond the SM Dark matter theory Inflation Quantum fields in curved spacetimes |
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Late vacuum choice and slow roll approximation in gravitational particle production during reheatingCembranos, Jose A.R.Garay, Luis J.Parra-López, ÁlvaroSánchez Velázquez, Jose M.Cosmology of Theories beyond the SMDark matter theoryInflationQuantum fields in curved spacetimesIn the transition between inflation and reheating, the curvature scalar typically undergoes oscillations which have significant impact on the density of gravitationally produced particles. The commonly used adiabatic vacuum prescription for the extraction of produced particle spectra becomes a non-reliable definition of vacuum in the regimes for which this oscillatory behavior is important. In this work, we study particle production for a scalar field non-minimally coupled to gravity, taking into account the complete dynamics of spacetime during inflation and reheating. We derive an approximation for the solution to the mode equation during the slow-roll of the inflaton and analyze the importance of Ricci scalar oscillations in the resulting spectra. Additionally, we propose a prescription for the vacuum that allows to safely extrapolate the result to the present, given that the test field interacts only gravitationally. Lastly, we calculate the abundance of dark matter this mechanism yields and compare it to observations.This work was partially supported by the MICINN (Ministerio de Ciencia e Innovación, Spain) projects PID2019-107394GB-I00/AEI/10.13039/501100011033 (AEI/FEDER, UE), PID2020- 118159GBC44, and PID2022-139841NB-I00, COST (European Cooperation in Science and Technology) Actions CA21106 and CA21136. Additionally, Á.P.-L. is supported by the MIU (Ministerio de Universidades, Spain) fellowship FPU20/05603. JARC acknowledges support by Institut Pascal at Université Paris-Saclay during the Paris-Saclay Astroparticle Symposium 2022, with the support of the P2IO Laboratory of Excellence (program “Investissements d’avenir” ANR-11-IDEX-0003-01 Paris-Saclay and ANR-10-LABX-0038), the P2I axis of the Graduate School of Physics of Université Paris-Saclay, as well as IJCLab, CEA, APPEC, IAS, OSUPS, and the IN2P3 master projet UCMN. Finally, JMSV acknowledges the support of the Spanish Agencia Estatal de Investigación through the grant “IFT Centro de Excelencia Severo Ochoa CEX2020-001007-S".Peer reviewedConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202420242023info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Preprintinfo:eu-repo/semantics/submittedVersionhttp://hdl.handle.net/10261/350329https://api.elsevier.com/content/abstract/scopus_id/85169537711reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésJournal of Cosmology and Astroparticle Physicshttps://iopscience.iop.org/article/10.1088/1475-7516/2023/08/060Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3503292026-05-22T06:33:51Z |
| dc.title.none.fl_str_mv |
Late vacuum choice and slow roll approximation in gravitational particle production during reheating |
| title |
Late vacuum choice and slow roll approximation in gravitational particle production during reheating |
| spellingShingle |
Late vacuum choice and slow roll approximation in gravitational particle production during reheating Cembranos, Jose A.R. Cosmology of Theories beyond the SM Dark matter theory Inflation Quantum fields in curved spacetimes |
| title_short |
Late vacuum choice and slow roll approximation in gravitational particle production during reheating |
| title_full |
Late vacuum choice and slow roll approximation in gravitational particle production during reheating |
| title_fullStr |
Late vacuum choice and slow roll approximation in gravitational particle production during reheating |
| title_full_unstemmed |
Late vacuum choice and slow roll approximation in gravitational particle production during reheating |
| title_sort |
Late vacuum choice and slow roll approximation in gravitational particle production during reheating |
| dc.creator.none.fl_str_mv |
Cembranos, Jose A.R. Garay, Luis J. Parra-López, Álvaro Sánchez Velázquez, Jose M. |
| author |
Cembranos, Jose A.R. |
| author_facet |
Cembranos, Jose A.R. Garay, Luis J. Parra-López, Álvaro Sánchez Velázquez, Jose M. |
| author_role |
author |
| author2 |
Garay, Luis J. Parra-López, Álvaro Sánchez Velázquez, Jose M. |
| author2_role |
author author author |
| dc.contributor.none.fl_str_mv |
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72] |
| dc.subject.none.fl_str_mv |
Cosmology of Theories beyond the SM Dark matter theory Inflation Quantum fields in curved spacetimes |
| topic |
Cosmology of Theories beyond the SM Dark matter theory Inflation Quantum fields in curved spacetimes |
| description |
In the transition between inflation and reheating, the curvature scalar typically undergoes oscillations which have significant impact on the density of gravitationally produced particles. The commonly used adiabatic vacuum prescription for the extraction of produced particle spectra becomes a non-reliable definition of vacuum in the regimes for which this oscillatory behavior is important. In this work, we study particle production for a scalar field non-minimally coupled to gravity, taking into account the complete dynamics of spacetime during inflation and reheating. We derive an approximation for the solution to the mode equation during the slow-roll of the inflaton and analyze the importance of Ricci scalar oscillations in the resulting spectra. Additionally, we propose a prescription for the vacuum that allows to safely extrapolate the result to the present, given that the test field interacts only gravitationally. Lastly, we calculate the abundance of dark matter this mechanism yields and compare it to observations. |
| publishDate |
2023 |
| dc.date.none.fl_str_mv |
2023 2024 2024 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article http://purl.org/coar/resource_type/c_6501 Preprint info:eu-repo/semantics/submittedVersion |
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article |
| status_str |
submittedVersion |
| dc.identifier.none.fl_str_mv |
http://hdl.handle.net/10261/350329 https://api.elsevier.com/content/abstract/scopus_id/85169537711 |
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http://hdl.handle.net/10261/350329 https://api.elsevier.com/content/abstract/scopus_id/85169537711 |
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Inglés |
| language_invalid_str_mv |
Inglés |
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Journal of Cosmology and Astroparticle Physics https://iopscience.iop.org/article/10.1088/1475-7516/2023/08/060 Sí |
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info:eu-repo/semantics/openAccess |
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openAccess |
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reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC instname:Consejo Superior de Investigaciones Científicas (CSIC) |
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Consejo Superior de Investigaciones Científicas (CSIC) |
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DIGITAL.CSIC. Repositorio Institucional del CSIC |
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DIGITAL.CSIC. Repositorio Institucional del CSIC |
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