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

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

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Pastor Carpi, Sergio; Esteban Pretel, Andreu; Tomàs, Ricard; Raffelt, Georg G.; Sigl, Günter
Aquest document és un/a article, creat/da en: 2008
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/cm3 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.

    Pastor Carpi, SErgio 2008 Mu-tau neutrino refraction and collective three-flavor transformations in supernovae Physical Review D 77 065024-1 065024-9
http://dx.doi.org/10.1088/1742-6596/136/4/042076
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