Collective neutrino oscillations in turbulent backgrounds

Journal Article · Sat Oct 15 00:00:00 EDT 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.84.085023· OSTI ID:21607956

Reid, Giles; Adams, Jenni; Seunarine, Suruj ^[1]

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1. University of Canterbury, Christchurch (New Zealand)

Using a Kolmogorov turbulence model, we investigate the effects of fluctuations in matter and neutrino density in the region near a supernova core on the flavor oscillations of neutrinos emitted in the core collapse in a single-angle, two-flavor approximation. Deviation from a smooth background neutrino density causes significant alterations in the final flavor state of the neutrino ensemble after 400 km, but even very large fluctuations in the matter density do not strongly affect the state of the neutrinos after the collective phase. In both cases, there is a strong effect on the neutrino flavor evolution at intermediate radii, with the flavor evolution becoming much more chaotic. The effect of fluctuations also depends strongly on the initial neutrino spectra. We conclude that the true neutrino fluxes arriving at Earth from core-collapse supernova could differ considerably from predictions of neutrino fluxes based on approximate models with smoothly decreasing matter and neutrino densities.

• OSTI ID: 21607956
• Journal Information: Physical Review. D, Particles Fields, Vol. 84, Issue 8; Other Information: DOI: 10.1103/PhysRevD.84.085023; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
APPROXIMATIONS
CHAOS THEORY
DENSITY
FLAVOR MODEL
FLUCTUATIONS
MATTER
NEUTRINO OSCILLATION
NEUTRINOS
SIMULATION
SPECTRA
TURBULENCE
CALCULATION METHODS
COMPOSITE MODELS
ELEMENTARY PARTICLES
FERMIONS
LEPTONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MATHEMATICS
PARTICLE MODELS
PHYSICAL PROPERTIES
QUARK MODEL
VARIATIONS