Multiple Spectral Splits of Supernova Neutrinos

Journal Article · Fri Jul 31 00:00:00 EDT 2009 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.103.051105· OSTI ID:21370599

Dasgupta, Basudeb; Raffelt, Georg G ^[1]; Dighe, Amol ^[2]; Smirnov, Alexei Yu ^[3]

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1. Max-Planck-Institut fuer Physik (Werner-Heisenberg-Institut), Foehringer Ring 6, 80805 Muenchen (Germany)
2. Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005 (India)
3. Abdus Salam International Centre for Theoretical Physics, Strada Costiera 11, 34014 Trieste (Italy)

Collective oscillations of supernova neutrinos swap the spectra f{sub n}u{sub e}(E) and f{sub n}u{sub e}(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 nu and nu channels for both inverted and normal neutrino mass hierarchies. Depending on an instability condition, swaps develop around spectral crossings (energies where f{sub n}u{sub e}=f{sub n}u{sub x}, f{sub n}u{sub e}=f{sub n}u{sub x} as well as E->infinity 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.

• OSTI ID: 21370599
• Journal Information: Physical Review Letters, Vol. 103, Issue 5; Other Information: DOI: 10.1103/PhysRevLett.103.051105; (c) 2009 The American Physical Society; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
COSMIC NEUTRINOS
ELECTRON NEUTRINOS
FLAVOR MODEL
INSTABILITY
MASS
NEUTRINO OSCILLATION
SUPERNOVAE
BINARY STARS
COMPOSITE MODELS
COSMIC RADIATION
ELEMENTARY PARTICLES
ERUPTIVE VARIABLE STARS
FERMIONS
IONIZING RADIATIONS
LEPTONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
NEUTRINOS
PARTICLE MODELS
QUARK MODEL
RADIATIONS
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VARIABLE STARS