Multi-angle effects in collective supernova neutrino oscillations
Abstract
We study two-flavor collective neutrino oscillations in the dense-neutrino region above the neutrino sphere in a supernova (SN). The angular dependence of the neutrino-neutrino interaction potential causes "multi-angle" effects that can lead either to complete kinematical decoherence in flavor space or only to small differences between different trajectories. This nonlinear system switches abruptly between "self-maintained coherence" and "self-induced decoherence" among the angular modes, depending on the strength of the deleptonization flux. For a realistic SN the quasi single-angle behavior is probably typical, simplifying the numerical treatment and probably allowing for the survival of observational features of flavor oscillations.
Cite
@article{arxiv.0712.2176,
title = {Multi-angle effects in collective supernova neutrino oscillations},
author = {Andreu Esteban-Pretel and Sergio Pastor and Ricard Tomas and Georg Raffelt and Gunter Sigl},
journal= {arXiv preprint arXiv:0712.2176},
year = {2008}
}
Comments
Contribution to TAUP 07, Sendai, Japan