Volume 74, Number 5, June 2006
|Page(s)||813 - 816|
|Published online||26 April 2006|
Possible evidence for “dark radiation” from Big Bang Nucleosynthesis data
School of Physics, The University of New South Wales - Sydney NSW 2052, Australia
2 Physics Division, Argonne National Laboratory - Argonne, IL 60439-4843, USA
3 Department of Physics and Astronomy, State University of New York Stony Brook, NY 11794-3800, USA
Accepted: 3 April 2006
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 few percents of ordinary matter density. If so, all scales of this model can be fixed, provided brane-to-bulk leakage problem is solved.
PACS: 26.35.+c – Big Bang nucleosynthesis / 98.80.Cq – Particle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.) / 98.70.Vc – Background radiations
© EDP Sciences, 2006
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