We consider a simplified model for self-induced flavor conversions of a dense neutrino gas in two dimensions, showing new solutions that spontaneously break the spatial symmetries of the initial conditions. As a result of the symmetry breaking induced by the neutrino-neutrino interactions, the coherent behavior of the neutrino gas becomes unstable. This instability produces large spatial variations in the flavor content of the ensemble. Furthermore, it also leads to the creation of domains of different net lepton number flux. The transition of the neutrino gas from a coherent to incoherent behavior shows an intriguing analogy with a streaming flow changing from laminar to turbulent regime. These findings would be relevant for the self-induced conversions of neutrinos streaming-off a supernova core.

Self-induced flavor instabilities of a dense neutrino stream in a two-dimensional model / Mirizzi, A.; Mangano, G.; Saviano, N.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 92:2(2015). [10.1103/PhysRevD.92.021702]

Self-induced flavor instabilities of a dense neutrino stream in a two-dimensional model

Mangano G.;
2015

Abstract

We consider a simplified model for self-induced flavor conversions of a dense neutrino gas in two dimensions, showing new solutions that spontaneously break the spatial symmetries of the initial conditions. As a result of the symmetry breaking induced by the neutrino-neutrino interactions, the coherent behavior of the neutrino gas becomes unstable. This instability produces large spatial variations in the flavor content of the ensemble. Furthermore, it also leads to the creation of domains of different net lepton number flux. The transition of the neutrino gas from a coherent to incoherent behavior shows an intriguing analogy with a streaming flow changing from laminar to turbulent regime. These findings would be relevant for the self-induced conversions of neutrinos streaming-off a supernova core.
2015
Self-induced flavor instabilities of a dense neutrino stream in a two-dimensional model / Mirizzi, A.; Mangano, G.; Saviano, N.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 92:2(2015). [10.1103/PhysRevD.92.021702]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/836685
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