Thermal gravitational waves during reheating
Abstract In this work, we revisit the generation of stochastic gravitational waves (GWs) from interactions in the thermal plasma. We extend the existing literature by incorporating the reheating phase into the thermal history. Our results show that the amplitude of the GW spectrum can be significant...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-01-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP01(2025)137 |
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| _version_ | 1823863452816375808 |
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| author | Nicolás Bernal Yong Xu |
| author_facet | Nicolás Bernal Yong Xu |
| author_sort | Nicolás Bernal |
| collection | DOAJ |
| description | Abstract In this work, we revisit the generation of stochastic gravitational waves (GWs) from interactions in the thermal plasma. We extend the existing literature by incorporating the reheating phase into the thermal history. Our results show that the amplitude of the GW spectrum can be significantly enhanced because the temperature during reheating can be much higher than the reheating temperature. Furthermore, since the temperature evolution during reheating differs from that of free radiation, the peak frequency of the spectrum can also shift. Additionally, the morphology of the spectrum can present characteristic features. We also compute the contribution of the integrated GW spectrum to the effective number of neutrino species, ∆N eff, which can be substantially larger. |
| format | Article |
| id | doaj-art-1213d4121f654302b5233536dbe02c66 |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-1213d4121f654302b5233536dbe02c662025-02-09T12:08:04ZengSpringerOpenJournal of High Energy Physics1029-84792025-01-012025112310.1007/JHEP01(2025)137Thermal gravitational waves during reheatingNicolás Bernal0Yong Xu1New York University Abu DhabiPRISMA+ Cluster of Excellence and Mainz Institute for Theoretical Physics, Johannes Gutenberg UniversityAbstract In this work, we revisit the generation of stochastic gravitational waves (GWs) from interactions in the thermal plasma. We extend the existing literature by incorporating the reheating phase into the thermal history. Our results show that the amplitude of the GW spectrum can be significantly enhanced because the temperature during reheating can be much higher than the reheating temperature. Furthermore, since the temperature evolution during reheating differs from that of free radiation, the peak frequency of the spectrum can also shift. Additionally, the morphology of the spectrum can present characteristic features. We also compute the contribution of the integrated GW spectrum to the effective number of neutrino species, ∆N eff, which can be substantially larger.https://doi.org/10.1007/JHEP01(2025)137Early Universe Particle PhysicsCosmology of Theories BSM |
| spellingShingle | Nicolás Bernal Yong Xu Thermal gravitational waves during reheating Journal of High Energy Physics Early Universe Particle Physics Cosmology of Theories BSM |
| title | Thermal gravitational waves during reheating |
| title_full | Thermal gravitational waves during reheating |
| title_fullStr | Thermal gravitational waves during reheating |
| title_full_unstemmed | Thermal gravitational waves during reheating |
| title_short | Thermal gravitational waves during reheating |
| title_sort | thermal gravitational waves during reheating |
| topic | Early Universe Particle Physics Cosmology of Theories BSM |
| url | https://doi.org/10.1007/JHEP01(2025)137 |
| work_keys_str_mv | AT nicolasbernal thermalgravitationalwavesduringreheating AT yongxu thermalgravitationalwavesduringreheating |