Flavor oscillations in the supernova hot bubble region: nonlinear effects of neutrino background.

作者: Sergio Pastor , Georg Raffelt

DOI: 10.1103/PHYSREVLETT.89.191101

关键词: OscillationNeutrinoSolar neutrino problemSupernovaNucleosynthesisPhysicsAstrophysicsNeutrino oscillationSolar neutrinoMeasurements of neutrino speed

摘要: The neutrino flux close to a supernova core contributes substantially refraction so that flavor oscillations become nonlinear phenomenon. One unexpected consequence is efficient transformation for antineutrinos in region where only neutrinos encounter Mikheyev-Smirnov-Wolfenstein resonance or vice versa. Contrary previous studies we find the neutrino-driven wind electron fraction ${Y}_{e}$ always stays below 0.5, corresponding neutron-rich environment as required by r-process nucleosynthesis. relevant range of masses and mixing angles includes indicated LSND, but not atmospheric solar oscillation parameters.

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