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Neutrino Mass Hierarchy and Stepwise Spectral Swapping of Supernova Neutrino Flavors

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arxiv 0707.0290 v2 pith:VDSPAQR4 submitted 2007-07-02 astro-ph hep-ph

classification astro-phhep-ph
keywords neutrinohierarchymasssupernovaaboveanglecalculationscase
verification ladder T0 review T1 audit T2 compute T3 formal

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abstract

We examine a phenomenon recently predicted by numerical simulations of supernova neutrino flavor evolution: the swapping of supernova $\nu_e$ and $\nu_{\mu,\tau}$ energy spectra below (above) energy $\EC$ for the normal (inverted) neutrino mass hierarchy. We present the results of large-scale numerical calculations which show that in the normal neutrino mass hierarchy case, $\EC$ decreases as the assumed $\nu_e\rightleftharpoons\nu_{\mu,\tau}$ effective $2\times 2$ vacuum mixing angle ($\simeq \theta_{1 3}$) is decreased. However, these calculations also indicate that $\EC$ is essentially independent of the vacuum mixing angle in the inverted neutrino mass hierarchy case. With a good neutrino signal from a future Galactic supernova, the above results could be used to determine the neutrino mass hierarchy even if $\theta_{13}$ is too small to be detected in terrestrial neutrino oscillation experiments.

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Forward citations

Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

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    astro-ph.HE 2026-08 conditional novelty 6.0 of 10

    Semi-analytic formulas for the quasi-steady flavor state of multi-energy neutrinos reproduce numerical kinetic-equation solutions to about 10-15% accuracy in homogeneous periodic boxes.

  3. Solar-System Abundances of $p$-Nuclides Probe Collective Neutrino Oscillations in Supernovae

    hep-ph 2026-07 conditional novelty 6.0 of 10

    Nearby neutrino flavor conversion in a supernova can boost νp-process yields of p-nuclides like 92Mo and 92Nb by up to two orders of magnitude, matching solar abundances when conversion starts within ~10 km of the pro...

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