TY  - CONF
AU  - Bianco, Sara
AU  - Schmidt-Hoberg, Kai
AU  - Frerick, Jonas
AU  - Hufnagel, Marco
AU  - Depta, Paul Frederik
AU  - Thomas, Hambye
TI  - BBN photodisintegration limitsfrom neutrino injections
M1  - PUBDB-2024-07416
PY  - 2024
AB  - Constraints on dark sector particles decaying into neutrinos typically focus on their impact on the effective number of relativistic species in the early Universe. However, for heavy relics with longer lifetimes, constraints mainly arise from the photo-disintegration of primordial abundances. The high-energy neutrinos injected by the decay can interact with both the thermal neutrinos and other high-energy neutrinos. Among these interactions, annihilations into electromagnetic particles will induce an electromagnetic cascade that affects the abundances of the already formed light elements via photo-disintegration. In this work, we present constraints on these dark sector particles. Specifically, we implement a Monte Carlo code to simulate the electromagnetic cascade, instead of solving the full set of Boltzmann equations. We find improved bounds on the particle's lifetime, abundance, and mass.
T2  - Invisibles24 Workshop
CY  - 1 Jul 2024 - 5 Jul 2024, Bologna (Italy)
Y2  - 1 Jul 2024 - 5 Jul 2024
M2  - Bologna, Italy
LB  - PUB:(DE-HGF)24
UR  - https://bib-pubdb1.desy.de/record/619158
ER  -