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Cosmology seeking friendship with sterile neutrinos
Jan Hamann, Steen Hannestad, Georg G. Raffelt +2
Precision cosmology and big-bang nucleosynthesis mildly favor extra radiation in the universe beyond photons and ordinary neutrinos, lending support to the existence of low-mass st…
Synchronization vs. decoherence of neutrino oscillations at intermediate densities
Georg G. Raffelt, Irene Tamborra
We study collective oscillations of a two-flavor neutrino system with arbitrary but fixed density. In the vacuum limit, modes with different energies quickly de-phase (kinematical…
Neutrino mass hierarchy and three-flavor spectral splits of supernova neutrinos
Basudeb Dasgupta, Alessandro Mirizzi, Irene Tamborra +1
It was recently realized that three-flavor effects could peculiarly modify the development of spectral splits induced by collective oscillations, for supernova neutrinos emitted du…
Triggering collective oscillations by three-flavor effects
Basudeb Dasgupta, Georg G. Raffelt, Irene Tamborra
Collective flavor transformations in supernovae, caused by neutrino-neutrino interactions, are essentially a two-flavor phenomenon driven by the atmospheric mass difference and the…