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

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

2007-12-07

arxiv.org/abs/0712.1137v2

Phys.Rev.D77:065024,2008

Astronomy and Astrophysics

Astrophysics

9 pages, 7 figures. New presentation of results, version to be published in PRD

Scientific paper

10.1103/PhysRevD.77.065024

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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