Overproduction of primordial helium-4 in the presence of neutrino oscillations
arXiv:astro-ph/0109105 · doi:10.1016/S0927-6505(02)00238-4
Abstract
The maximum overproduction of helium-4 in cosmological nucleosynthesis with active--sterile neutrino oscillations, nu_e -> nu_s, efficient after decoupling of electron neutrino, is analyzed. The kinetic effects on primordial nucleosynthesis due to neutrino spectrum distortion, caused by oscillations, are precisely taken into account. The maximum overproduction of primordial He-4 as a function of oscillation parameters is obtained from the analysis of the kinetics of the nucleons and the oscillating neutrinos, for the full range of parameters of the discussed oscillation model. A maximum relative increase of He-4, up to 14% for non-resonant oscillations and up to 32% for resonant ones is registered. Cosmological constraints on oscillation parameters are also discussed.
17 pages, 5 figures, much extended version, references and 3 figures added
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Cited by in corpus (7)
- Cosmological Lepton Asymmetry, Primordial Nucleosynthesis, and Sterile Neutrinos
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- Coherent Active-Sterile Neutrino Flavor Transformation in the Early Universe
- Relaxed constraints on neutrino oscillation parameters
- Neutrino Spectrum Distortion Due to Oscillations and its BBN Effect
- More General BBN Constraints on Neutrino Oscillations Parameters - Relaxed or Strengthened
- Neutrino Oscillations and the Early Universe