Astrophysical Neutrinos and Flavor Evolution With Self Interaction
  In a core collapse supernova, collective oscillations of neutrinos emitted by the proto-neutron star significantly modifies the partition of energy between different flavors in a way which is potentially important for the nucleosynthesis of heavy elements at the outer layers. As the outcome of collective oscillations depends nonlinearly on the chosen initial conditions proto-neutron star, their systematical study across the proto-neutron star model space may provide answers to some key questions. 
T. Bulmus, Y. Pehlivan
astro-ph.HE hep-ph