Does the CMB prefer a leptonic Universe

@article{Schwarz2013DoesTC,
  title={Does the CMB prefer a leptonic Universe},
  author={D. Schwarz and M. Stuke},
  journal={New Journal of Physics},
  year={2013},
  volume={15},
  pages={033021}
}
Recent observations of the cosmic microwave background at smallest angular scales and updated abundances of primordial elements indicate an increase of the energy density and the helium-4 abundance with respect to standard big bang nucleosynthesis with three neutrino flavour. This calls for a reanalysis of the observational bounds on neutrino chemical potentials, which encode the number asymmetry between cosmic neutrinos and anti-neutrinos and thus measures the lepton asymmetry of the Universe… Expand
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