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

A. Esteban-Pretel S. Pastor R. Tomas G. G. Raffelt G. Sigl 1
APC (UMR_7164) - AstroParticule et Cosmologie, Institut für theoretische Physik
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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Submitted on : Thursday, April 17, 2008 - 3:34:41 PM
Last modification on : Wednesday, October 21, 2020 - 4:32:15 PM

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A. Esteban-Pretel, S. Pastor, R. Tomas, G. G. Raffelt, G. Sigl. Mu-tau neutrino refraction and collective three-flavor transformations in supernovae. Physical Review D, American Physical Society, 2008, 77, pp.065024. ⟨10.1103/PhysRevD.77.065024⟩. ⟨in2p3-00274225⟩



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