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arXiv · 1109.5195

Neutrino Luminosity and Matter-Induced Modification of Collective Neutrino Flavor Oscillations in Supernovae

John F. Cherry·Meng-Ru Wu·Joe Carlson·Huaiyu Duan·George M. Fuller·Yong-Zhong Qian
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Abstract

We show that the bump in the electron number density profile at the base of the hydrogen envelope in O-Ne-Mg core-collapse supernovae causes an interesting interplay between neutrino-electron and neutrino-neutrino forward scattering effects in the flavor evolution of low-energy nu_e in the neutronization burst. The bump allows a significant fraction of the low-energy nu_e to survive by rendering their flavor evolution nonadiabatic. Increasing the luminosity of the neutronization burst shifts the bump-affected nu_e to lower energy with reduced survival probability. Similarly, lowering the luminosity shifts the bump-affected neutrinos to higher energies. While these low energy neutrinos lie near the edge of detectability, the population of bump-affected neutrinos has direct influence on the spectral swap formation in the neutrino signal at higher energies.

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John F. Cherry, Meng-Ru Wu, Joe Carlson, Huaiyu Duan, George M. Fuller, Yong-Zhong Qian. 2011-09-23. Neutrino Luminosity and Matter-Induced Modification of Collective Neutrino Flavor Oscillations in Supernovae. https://doi.org/10.1103/physrevd.85.125010

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