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arXiv · 1506.06805

Breaking the symmetries in self-induced flavor conversions of neutrino beams from a ring

Alessandro Mirizzi
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Abstract

Self-induced flavor conversions of supernova (SN) neutrinos have been characterized in the spherically symmetric "bulb" model, reducing the neutrino evolution to a one dimensional problem along a radial direction. We lift this assumption, presenting a two-dimensional toy-model where neutrino beams are launched in many different directions from a ring. We find that self-interacting neutrinos spontaneously break the spatial symmetries of this model. As a result the flavor content and the lepton number of the neutrino gas would acquire seizable direction-dependent variations, breaking the coherent behavior found in the symmetric case. This finding would suggest that the previous results of the self-induced flavor evolution obtained in one-dimensional models should be critically re-examined.

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Alessandro Mirizzi. 2015-10-29. Breaking the symmetries in self-induced flavor conversions of neutrino beams from a ring. https://doi.org/10.1103/physrevd.92.105020

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