Self-induced spectral splits in supernova neutrino fluxes

Details Self-induced spectral splits in supernova neutrino fluxes Self-induced spectral splits in supernova neutrino fluxes

2007-05-13

arxiv.org/abs/0705.1830v3

Phys.Rev.D76:081301,2007; Erratum-ibid.D77:029903,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 2 figures, Misprint in Eq.(14) corrected relative to published version

Scientific paper

10.1103/PhysRevD.76.081301

In the dense-neutrino region above the neutrino sphere of a supernova (r > 400 km), neutrino-neutrino refraction causes collective flavor transformations. They can lead to "spectral splits" where an energy E_split splits the transformed spectrum sharply into parts of almost pure but different flavors. Unless there is an ordinary MSW resonance in the dense-neutrino region, E_split is determined by flavor-lepton number conservation alone. Spectral splits are created by an adiabatic transition between regions of large and small neutrino density. We solve the equations of motion in the adiabatic limit explicitly and provide analytic expressions for a generic example.

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