Kaluza-Klein Graviton Freeze-In and Big Bang Nucleosynthesis
Kaluza-Klein Graviton Freeze-In and Big Bang Nucleosynthesis
In models featuring extra spatial dimensions, particle collisions in the early universe can produce Kaluza-Klein gravitons. Such particles will later decay, potentially impacting the process of Big Bang nucleosynthesis. In this paper, we consider scenarios in which gravity is free to propagate throughout $n$ flat, compactified extra dimensions, while the …