Updated Big Bang Nucleosynthesis Bounds on Long-lived Particles from Dark Sectors
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866929602761326592 |
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| author | Alves, J. R. Angel, L. Guedes, L. Neves, R. M. P. Queiroz, F. S. da Silva, D. R. Silva, R. Villamizar, Y. |
| author_facet | Alves, J. R. Angel, L. Guedes, L. Neves, R. M. P. Queiroz, F. S. da Silva, D. R. Silva, R. Villamizar, Y. |
| contents | As electromagnetic showers may alter the abundance of Helium, Lithium, and Deuterium, we can place severe constraints on the lifetime and amount of electromagnetic energy injected by long-lived particles. Considering up-to-date measurements of the light element abundances that point to $Y_p=0.245\pm 0.003$, $({\rm D/H})= (2.527\pm 0.03)\times 10^{-5}$, and the baryon-to-photon ratio obtained from the Cosmic Microwave Background data, $η=6.104 \times 10^{-10}$, we derive upper limits on the fraction of electromagnetic energy produced by long-lived particles. Our findings apply to decaying dark matter models, long-lived gravitinos, and other non-thermal processes that occurred in the early universe between $10^2-10^{10}$ seconds. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2311_07688 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Updated Big Bang Nucleosynthesis Bounds on Long-lived Particles from Dark Sectors Alves, J. R. Angel, L. Guedes, L. Neves, R. M. P. Queiroz, F. S. da Silva, D. R. Silva, R. Villamizar, Y. High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics High Energy Astrophysical Phenomena High Energy Physics - Theory As electromagnetic showers may alter the abundance of Helium, Lithium, and Deuterium, we can place severe constraints on the lifetime and amount of electromagnetic energy injected by long-lived particles. Considering up-to-date measurements of the light element abundances that point to $Y_p=0.245\pm 0.003$, $({\rm D/H})= (2.527\pm 0.03)\times 10^{-5}$, and the baryon-to-photon ratio obtained from the Cosmic Microwave Background data, $η=6.104 \times 10^{-10}$, we derive upper limits on the fraction of electromagnetic energy produced by long-lived particles. Our findings apply to decaying dark matter models, long-lived gravitinos, and other non-thermal processes that occurred in the early universe between $10^2-10^{10}$ seconds. |
| title | Updated Big Bang Nucleosynthesis Bounds on Long-lived Particles from Dark Sectors |
| topic | High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics High Energy Astrophysical Phenomena High Energy Physics - Theory |
| url | https://arxiv.org/abs/2311.07688 |