| Full text | |
| Author(s): |
Alves, J. R.
;
Angel, L.
;
Guedes, L.
;
Neves, R. M. P.
;
Queiroz, F. S.
;
da Silva, D. R.
;
Silva, R.
;
Villamizar, Y.
Total Authors: 8
|
| Document type: | Journal article |
| Source: | Physics Letters B; v. 855, p. 6-pg., 2024-07-08. |
| Abstract | |
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 upto-date measurements of the light element abundances that point to Y-p = 0.245 +/- 0.003, (D/H) = (2.527 +/- 0.03) x 10 -5 , and the baryon-to-photon ratio obtained from the Cosmic Microwave Background data, eta = 6.104 x 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. (AU) | |
| FAPESP's process: | 18/25225-9 - São Paulo Research and Analysis Center |
| Grantee: | Sergio Ferraz Novaes |
| Support Opportunities: | Special Projects |
| FAPESP's process: | 23/01197-4 - Closing in on Dark Matter at the LHC |
| Grantee: | Yoxara Sánchez Villamizar |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 21/01089-1 - Cherenkov Telescope Array: construction and first discoveries |
| Grantee: | Luiz Vitor de Souza Filho |
| Support Opportunities: | Special Projects |
| FAPESP's process: | 21/14335-0 - ICTP South American Institute for Fundamental Research: a regional center for Theoretical Physics |
| Grantee: | Nathan Jacob Berkovits |
| Support Opportunities: | Special Projects |