Multiple spectral splits of supernova neutrinos

Dasgupta, Basudeb ; Dighe, Amol ; Raffelt, Georg G. ; Smirnov, Alexei Yu. (2009) Multiple spectral splits of supernova neutrinos Physical Review Letters, 103 (5). Article ID 051105. ISSN 0031-9007

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Collective oscillations of supernova neutrinos swap the spectra fνε (E) and fν̅ε (E) with those of another flavor in certain energy intervals bounded by sharp spectral splits. This phenomenon is far more general than previously appreciated: typically one finds one or more swaps and accompanying splits in the ν and ν̅ channels for both inverted and normal neutrino mass hierarchies. Depending on an instability condition, swaps develop around spectral crossings (energies where fνε=fνx, fν̅ε= fν̅x as well as E→ ∞ where all fluxes vanish), and the widths of swaps are determined by the spectra and fluxes. Washout by multiangle decoherence varies across the spectrum and splits can survive as sharp spectral features.

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Source:Copyright of this article belongs to American Physical Society.
ID Code:101497
Deposited On:09 Mar 2018 10:25
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