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arXiv · 0712.1137

Mu-tau neutrino refraction and collective three-flavor transformations in supernovae

Andreu Esteban-Pretel·Sergio Pastor·Ricard Tomas·Georg G. Raffelt·Gunter Sigl
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Abstract

We study three-flavor collective neutrino transformations in the dense-neutrino region above the neutrino sphere of a supernova core. We find that two-flavor conversions driven by the atmospheric mass difference and the 13-mixing angle capture the full effect if one neglects the second-order difference between the muon and tau neutrino refractive index. Including this "mu-tau matter term" provides a resonance at a density of approximately 3 x 10^7 g cm^-3 that typically causes significant modifications of the overall electron neutrino and antineutrino survival probabilities. This effect is surprisingly sensitive to deviations from maximal 23-mixing, being different for each octant.

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Andreu Esteban-Pretel, Sergio Pastor, Ricard Tomas, Georg G. Raffelt, Gunter Sigl. 2008-03-03. Mu-tau neutrino refraction and collective three-flavor transformations in supernovae. https://doi.org/10.1103/physrevd.77.065024

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