Possible evidence for “dark radiation” from Big Bang Nucleosynthesis data
Possible evidence for “dark radiation” from Big Bang Nucleosynthesis data
We address the emerging discrepancy between the Big Bang Nucleosynthesis data and standard cosmology, which asks for a bit longer evolution time. If this effect is real, one possible implication (in a framework of brane cosmology model) is that there is a "dark radiation" component which is negative and makes …