Self-induced suppression of collective neutrino oscillations in a supernova

Details Self-induced suppression of collective neutrino oscillations in a supernova Self-induced suppression of collective neutrino oscillations in a supernova

2010-06-11

arxiv.org/abs/1006.2359v2

Phys.Rev.Lett.106:091101,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 4 figures; updated to match the PRL version

Scientific paper

10.1103/PhysRevLett.106.091101

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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