Low-energy spectral features of supernova (anti)neutrinos in inverted hierarchy
- Dipartimento Interateneo di Fisica 'Michelangelo Merlin', Via Orabona 4, 70126 Bari (Italy)
- Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Via Orabona 4, 70126 Bari (Italy)
In the dense supernova core, self-interactions may align the flavor polarization vectors of {nu} and {nu} and induce collective flavor transformations. Different alignment Ansaetze are known to describe approximately the phenomena of synchronized or bipolar oscillations and the split of {nu} energy spectra. We discuss another phenomenon observed in some numerical experiments in inverted hierarchy, showing features akin to a low-energy split of {nu} 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 {nu} plus two {nu} modes. The associated spectral features, however, appear to be fragile when passing from single to multiangle simulations.
- OSTI ID:
- 21254656
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 78, Issue 9; Other Information: DOI: 10.1103/PhysRevD.78.097301; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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