WIMPs, FIMPs, and Inflaton phenomenology via reheating, CMB and ∆N eff
Abstract In this paper, we extensively analyzed the reheating dynamics after inflation and looked into its possible implication on dark matter (DM) and inflaton phenomenology. We studied the reheating through various possible channels of inflaton going into massless scalars (bosonic reheating) and f...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-09-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP09(2023)012 |
| _version_ | 1797371238574718976 |
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| author | MD Riajul Haque Debaprasad Maity Rajesh Mondal |
| author_facet | MD Riajul Haque Debaprasad Maity Rajesh Mondal |
| author_sort | MD Riajul Haque |
| collection | DOAJ |
| description | Abstract In this paper, we extensively analyzed the reheating dynamics after inflation and looked into its possible implication on dark matter (DM) and inflaton phenomenology. We studied the reheating through various possible channels of inflaton going into massless scalars (bosonic reheating) and fermions (fermionic reheating) via non-gravitational and gravity-mediated decay processes. We further include the finite temperature effect on the decay process. Along with their precise roles in governing the dynamics, we compared the relative importance of different temperature-corrected decay channels in the gradual process of reheating depending on the reheating equation of state (EoS), which is directly related to inflaton potential. Particularly, the universal gravitational decay of inflaton is observed to play a very crucial role in the reheating process for a large range of inflaton decay parameters. For our study, we consider typical α-attractor inflationary models. We further establish the intriguing connection among those different inflaton decay channels and the CMB power spectrum that can have profound implications in building up a unified model of inflation, reheating, and DM. We analyze both fermion and scalar DM with different physical processes being involved, such as gravitational scattering, thermal bath scattering, and direct inflaton decay. Gravitational decay can again be observed to play a crucial role in setting the maximum limit on DM mass, especially in the FIMP scenario, which has already been observed earlier in the literature [52]. Depending on the coupling strength, we have analyzed in detail the production of both FIMP and WIMP-like DM during reheating and their detailed phenomenological implications from the perspective of various cosmological and laboratory experiments. |
| first_indexed | 2024-03-08T18:17:03Z |
| format | Article |
| id | doaj.art-d04b145d98e34c848fd286b286bc622f |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-03-08T18:17:03Z |
| publishDate | 2023-09-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-d04b145d98e34c848fd286b286bc622f2023-12-31T12:07:23ZengSpringerOpenJournal of High Energy Physics1029-84792023-09-012023917510.1007/JHEP09(2023)012WIMPs, FIMPs, and Inflaton phenomenology via reheating, CMB and ∆N effMD Riajul Haque0Debaprasad Maity1Rajesh Mondal2Department of Physics, Indian Institute of Technology MadrasDepartment of Physics, Indian Institute of Technology GuwahatiDepartment of Physics, Indian Institute of Technology GuwahatiAbstract In this paper, we extensively analyzed the reheating dynamics after inflation and looked into its possible implication on dark matter (DM) and inflaton phenomenology. We studied the reheating through various possible channels of inflaton going into massless scalars (bosonic reheating) and fermions (fermionic reheating) via non-gravitational and gravity-mediated decay processes. We further include the finite temperature effect on the decay process. Along with their precise roles in governing the dynamics, we compared the relative importance of different temperature-corrected decay channels in the gradual process of reheating depending on the reheating equation of state (EoS), which is directly related to inflaton potential. Particularly, the universal gravitational decay of inflaton is observed to play a very crucial role in the reheating process for a large range of inflaton decay parameters. For our study, we consider typical α-attractor inflationary models. We further establish the intriguing connection among those different inflaton decay channels and the CMB power spectrum that can have profound implications in building up a unified model of inflation, reheating, and DM. We analyze both fermion and scalar DM with different physical processes being involved, such as gravitational scattering, thermal bath scattering, and direct inflaton decay. Gravitational decay can again be observed to play a crucial role in setting the maximum limit on DM mass, especially in the FIMP scenario, which has already been observed earlier in the literature [52]. Depending on the coupling strength, we have analyzed in detail the production of both FIMP and WIMP-like DM during reheating and their detailed phenomenological implications from the perspective of various cosmological and laboratory experiments.https://doi.org/10.1007/JHEP09(2023)012Early Universe Particle PhysicsParticle Nature of Dark Matter |
| spellingShingle | MD Riajul Haque Debaprasad Maity Rajesh Mondal WIMPs, FIMPs, and Inflaton phenomenology via reheating, CMB and ∆N eff Journal of High Energy Physics Early Universe Particle Physics Particle Nature of Dark Matter |
| title | WIMPs, FIMPs, and Inflaton phenomenology via reheating, CMB and ∆N eff |
| title_full | WIMPs, FIMPs, and Inflaton phenomenology via reheating, CMB and ∆N eff |
| title_fullStr | WIMPs, FIMPs, and Inflaton phenomenology via reheating, CMB and ∆N eff |
| title_full_unstemmed | WIMPs, FIMPs, and Inflaton phenomenology via reheating, CMB and ∆N eff |
| title_short | WIMPs, FIMPs, and Inflaton phenomenology via reheating, CMB and ∆N eff |
| title_sort | wimps fimps and inflaton phenomenology via reheating cmb and ∆n eff |
| topic | Early Universe Particle Physics Particle Nature of Dark Matter |
| url | https://doi.org/10.1007/JHEP09(2023)012 |
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