Self-induced suppression of collective neutrino oscillations in a supernova |
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Authors: | Duan Huaiyu Friedland Alexander |
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Affiliation: | Theoretical Division, Los Alamos National Laboratory, New Mexico 87545, USA. |
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Abstract: | We investigate collective flavor oscillations of supernova neutrinos at late stages of the explosion. We first show that the frequently used single-angle (averaged coupling) approximation predicts oscillations close to, or perhaps even inside, the neutrinosphere, potentially invalidating the basic neutrino transport paradigm. Fortunately, we also find that the single-angle approximation breaks down in this regime; in the full multiangle calculation, the oscillations start safely outside the transport region. The new suppression effect is traced to the interplay between the dispersion in the neutrino-neutrino interactions and the vacuum oscillation term. |
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