Speaker
Ms
Silvia Lucía Correa Angel
(Universidade Federal do Rio Grande do Norte, International Institute of Physics)
Description
As electromagnetic showers may alter the abundance of Helium, Lithium, and Deuterium, we can place severe constraints on the lifetime and amount of energy injected by long-lived particles decaying into dark matter. Considering up-to-date measurements of the light element abundances that point to Yp = 0.245 ± 0.003,(D/H) = (2.527 ± 0.03) × 10−5,(7Li/H) = 1.58+0.35 −0.28 × 10−10, (6Li/7Li) = 0.05, and the baryon-to-photon ratio obtained from the Cosmic Microwave Background data, η = 6.14 × 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 and non-thermal processes between 102 and 1010 seconds in the early universe
Authors
Prof.
Farinaldo Queiroz
(Universidade Federal do Rio Grande do Norte, International Institute of Physics, Millennium Institute for Subatomic Physics at the High-Energy Frontier)
Ms
Leticia Maria Valença Guedes
(Universidade Federal do Rio Grande do Norte, International Institute of Physics)
Ms
Silvia Lucía Correa Angel
(Universidade Federal do Rio Grande do Norte, International Institute of Physics)
Dr
Deivid Rodrigo da Silva
(Universidad Federal da Paraiba)
Dr
Raissa Maria Pimentel Neves
(International Institute of Physics - UFRN)
