Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-08-06
Phys.Rev.D78:097301,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 pages, including 6 figures
Scientific paper
10.1103/PhysRevD.78.097301
In the dense supernova core, self-interactions may align the flavor polarization vectors of neutrinos and antineutrinos, and induce collective flavor transformations. Different alignment ansatzes are known to describe approximately the phenomena of synchronized or bipolar oscillations, and the split of neutrino energy spectra. We discuss another phenomenon observed in some numerical experiments in inverted hierarchy, showing features akin to a low-energy split of antineutrino spectra. The phenomenon appears to be approximately described by another alignment ansatz which, in the considered scenario, reduces the (nonadiabatic) dynamics of all energy modes to only two neutrino plus two antineutrino modes. The associated spectral features, however, appear to be fragile when passing from single- to multi-angle simulations.
Fogli Gian Luigi
Lisi Eligio
Marrone Antonio
Mirizzi Alessandro
Tamborra Irene
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