Possible evidence for "dark radiation" from Big Bang Nucleosynthesis Data

Abstract

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.

We found that references to some nhumbers from unpublished ref.3 in v1 lead to confusion of some readers: we decided to removed those in v2

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Cited by in corpus (8)

• Primordial Nucleosynthesis: from precision cosmology to fundamental physics
• The Case for Dark Radiation
• Neutrino and Dark Radiation properties in light of latest CMB observations
• Improved constraint on the primordial gravitational-wave density using recent cosmological data and its impact on cosmic string models
• Dark Radiation in extended cosmological scenarios
• Testing standard and non-standard neutrino physics with cosmological data
• Comparison of results on $N_{\mathrm{eff}}$ from various Planck likelihoods
• Semi-realistic Bouncing Domain Wall Cosmology