Post-inflationary production of particle dark matter: Non-minimal natural and Coleman–Weinberg inflationary scenarios
We investigate the production of non-thermal fermionic dark matter particles during the reheating era following slow roll inflation, driven by inflaton φ non-minimally coupled to the curvature scalar, R. Two types of non-minimal couplings are considered: ξφ2R for both natural (referred to as NM-N) a...
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Elsevier
2025-05-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S037026932500139X |
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| author | Anish Ghoshal Maxim Yu. Khlopov Zygmunt Lalak Shiladitya Porey |
| author_facet | Anish Ghoshal Maxim Yu. Khlopov Zygmunt Lalak Shiladitya Porey |
| author_sort | Anish Ghoshal |
| collection | DOAJ |
| description | We investigate the production of non-thermal fermionic dark matter particles during the reheating era following slow roll inflation, driven by inflaton φ non-minimally coupled to the curvature scalar, R. Two types of non-minimal couplings are considered: ξφ2R for both natural (referred to as NM-N) and for Coleman-Weinberg (referred to as NM-CW) inflation, and α(1+cos(φfa)) only for natural inflation (referred to as NMP-N), where α and ξ are dimensionless parameters and fa is an energy scale. We determine benchmark values for slow roll inflationary scenarios satisfying current bounds from Cosmic Microwave Background (CMB) radiation measurement and find the mass of inflaton to be Image 1 for all three inflationary scenarios and tensor-to-scalar ratio, r∼0.0177 (for NM-N), ∼0.0097 (for NMP-N), and r∼0.0157 (for NM-CW) which fall inside 1−σ contour on scalar spectral index versus r plane of Planck2018+Bicep3+Keck Array2018 joint analysis, and can be probed by future CMB observations e.g. Simons Observatory. We then show that dark matter particles produced from the decay of inflaton can fully match the present-day cold dark matter (CDM) yield, as well as other cosmological constraints, if the coupling value between inflaton and dark matter, yχ, and the dark matter mass, mχ, are within the range 10−1≳yχ≳10−20 for NM-N and NMP-N (10−4≳yχ≳10−20 for NM-CW) and Image 2 (for NM-N, NMP-N, and NM-CW). The exact range of yχ and mχ varies with different benchmark values as well as parameters of inflation, like energy scale of inflation and r, some of which are within reach of next-generation CMB experiments. |
| format | Article |
| id | doaj-art-9d1695b6340c46abafcab298ed187549 |
| institution | DOAJ |
| issn | 0370-2693 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj-art-9d1695b6340c46abafcab298ed1875492025-08-20T03:18:09ZengElsevierPhysics Letters B0370-26932025-05-0186413937910.1016/j.physletb.2025.139379Post-inflationary production of particle dark matter: Non-minimal natural and Coleman–Weinberg inflationary scenariosAnish Ghoshal0Maxim Yu. Khlopov1Zygmunt Lalak2Shiladitya Porey3Institute of Theoretical Physics, Faculty of Physics, University of Warsaw, ul. Pasteura 5, 02-093 Warsaw, PolandVirtual Institute of Astroparticle Physics, 75018 Paris, France; Institute of Physics, Southern Federal University, 344090 Rostov on Don, Russia; National Research Nuclear University “MEPHI”, 115409 Moscow, RussiaInstitute of Theoretical Physics, Faculty of Physics, University of Warsaw, ul. Pasteura 5, 02-093 Warsaw, PolandDepartment of Physics, Novosibirsk State University, Pirogova 2, 630090 Novosibirsk, Russia; Corresponding author.We investigate the production of non-thermal fermionic dark matter particles during the reheating era following slow roll inflation, driven by inflaton φ non-minimally coupled to the curvature scalar, R. Two types of non-minimal couplings are considered: ξφ2R for both natural (referred to as NM-N) and for Coleman-Weinberg (referred to as NM-CW) inflation, and α(1+cos(φfa)) only for natural inflation (referred to as NMP-N), where α and ξ are dimensionless parameters and fa is an energy scale. We determine benchmark values for slow roll inflationary scenarios satisfying current bounds from Cosmic Microwave Background (CMB) radiation measurement and find the mass of inflaton to be Image 1 for all three inflationary scenarios and tensor-to-scalar ratio, r∼0.0177 (for NM-N), ∼0.0097 (for NMP-N), and r∼0.0157 (for NM-CW) which fall inside 1−σ contour on scalar spectral index versus r plane of Planck2018+Bicep3+Keck Array2018 joint analysis, and can be probed by future CMB observations e.g. Simons Observatory. We then show that dark matter particles produced from the decay of inflaton can fully match the present-day cold dark matter (CDM) yield, as well as other cosmological constraints, if the coupling value between inflaton and dark matter, yχ, and the dark matter mass, mχ, are within the range 10−1≳yχ≳10−20 for NM-N and NMP-N (10−4≳yχ≳10−20 for NM-CW) and Image 2 (for NM-N, NMP-N, and NM-CW). The exact range of yχ and mχ varies with different benchmark values as well as parameters of inflation, like energy scale of inflation and r, some of which are within reach of next-generation CMB experiments.http://www.sciencedirect.com/science/article/pii/S037026932500139X |
| spellingShingle | Anish Ghoshal Maxim Yu. Khlopov Zygmunt Lalak Shiladitya Porey Post-inflationary production of particle dark matter: Non-minimal natural and Coleman–Weinberg inflationary scenarios Physics Letters B |
| title | Post-inflationary production of particle dark matter: Non-minimal natural and Coleman–Weinberg inflationary scenarios |
| title_full | Post-inflationary production of particle dark matter: Non-minimal natural and Coleman–Weinberg inflationary scenarios |
| title_fullStr | Post-inflationary production of particle dark matter: Non-minimal natural and Coleman–Weinberg inflationary scenarios |
| title_full_unstemmed | Post-inflationary production of particle dark matter: Non-minimal natural and Coleman–Weinberg inflationary scenarios |
| title_short | Post-inflationary production of particle dark matter: Non-minimal natural and Coleman–Weinberg inflationary scenarios |
| title_sort | post inflationary production of particle dark matter non minimal natural and coleman weinberg inflationary scenarios |
| url | http://www.sciencedirect.com/science/article/pii/S037026932500139X |
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