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Shockwaves in Supernovae: New Implications on the Diffuse Supernova Neutrino Background

Authors :
Galais, Sebastien
Kneller, James
Volpe, Cristina
Gava, Jerome
Source :
Phys.Rev.D81:053002,2010
Publication Year :
2009

Abstract

We investigate shock wave effects upon the diffuse supernova neutrino background using dynamic profiles taken from hydrodynamical simulations and calculating the neutrino evolution in three flavors with the S-matrix formalism. We show that the shock wave impact is significant and introduces modifications of the relic fluxes by about $20 \%$ and of the associated event rates at the level of $10-20 \%$. Such an effect is important since it is of the same order as the rate variation introduced when different oscillation scenarios (i.e. hierarchy or $\theta_{13}$) are considered. In addition, due to the shock wave, the rates become less sensitive to collective effects, in the inverted hierarchy and when $\sin^2 2 \theta_{13}$ is between the Chooz limit and $10^{-5}$. We propose a simplified model to account for shock wave effects in future predictions.<br />Comment: 8 pages, 9 figures

Details

Database :
arXiv
Journal :
Phys.Rev.D81:053002,2010
Publication Type :
Report
Accession number :
edsarx.0906.5294
Document Type :
Working Paper
Full Text :
https://doi.org/10.1103/PhysRevD.81.053002