Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-01-21
Physics
High Energy Physics
High Energy Physics - Phenomenology
13 pages, 6 figs
Scientific paper
A relic lepton asymmetry orders of magnitude bigger than the baryon one may hide in the relic neutrino background. No direct theoretical or experimental limitations on its magnitude and sign are known. Indirect cosmological constraints exist ranging from $|L|<0.01$ to $L<10$. We discuss a BBN model with late electron-sterile neutrino oscillations which is a fine leptometer - it is capable of feeling extremely small relic lepton asymmetry - $|L|>10^{-8}$. This sensitivity is achieved through the influence of such small $L$ on the neutrino oscillations, suppressing or enhancing them, and thus changing the primordially produced $^4He$. The influence of $L$ on nucleons freezing in pre-BBN epoch is numerically analyzed in the full range of the oscillation parameters of the model and for $ L \ge 10^{-10}$. The case of oscillations generated asymmetry by late electron-sterile oscillations and its effect on primordial $^4He$ is also briefly discussed.
No associations
LandOfFree
BBN with Late Electron-Sterile Neutrino Oscillations - The Finest Leptometer does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with BBN with Late Electron-Sterile Neutrino Oscillations - The Finest Leptometer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and BBN with Late Electron-Sterile Neutrino Oscillations - The Finest Leptometer will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-19511