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Shock waves in supernovae: New implications on the diffuse supernova neutrino background

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 θ13) are considered. In addition, due to the shock wave, the rates become less sensitive to collective effects, in the inverted hierarchy and when sin⁡22θ13 is between the Chooz limit and 10-5. We propose a simplified model to account for shock wave effects in future predictions.
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Contributor : Sophie Heurteau <>
Submitted on : Monday, May 3, 2010 - 3:06:06 PM
Last modification on : Wednesday, September 16, 2020 - 4:08:29 PM

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S. Galais, J. Kneller, C. Volpe, J. Gava. Shock waves in supernovae: New implications on the diffuse supernova neutrino background. Physical Review D, American Physical Society, 2010, 81, pp.053002. ⟨10.1103/PhysRevD.81.053002⟩. ⟨in2p3-00480097⟩

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