Damping of supernova neutrino transitions in stochastic shock-wave density profiles
| Autor: | Alessandro Mirizzi, Eligio Lisi, Gianluigi Fogli, D. Montanino |
|---|---|
| Přispěvatelé: | G. L., Fogli, E., Lisi, A., Mirizzi, Montanino, Daniele |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Shock wave
Physics Particle physics Astrophysics::High Energy Astrophysical Phenomena Astrophysics (astro-ph) FOS: Physical sciences Astronomy and Astrophysics Observable hep-ph Electron Astrophysics Wake Fisica astroparticellare Spectral line High Energy Physics - Phenomenology Supernova Amplitude High Energy Physics - Phenomenology (hep-ph) Fisica del neutrino astro-ph High Energy Physics::Experiment Neutrino |
| Popis: | Supernova neutrino flavor transitions during the shock wave propagation are known to encode relevant information not only about the matter density profile but also about unknown neutrino properties, such as the mass hierarchy (normal or inverted) and the mixing angle theta_13. While previous studies have focussed on "deterministic" density profiles, we investigate the effect of possible stochastic matter density fluctuations in the wake of supernova shock waves. In particular, we study the impact of small-scale fluctuations on the electron (anti)neutrino survival probability, and on the observable spectra of inverse-beta-decay events in future water-Cherenkov detectors. We find that such fluctuations, even with relatively small amplitudes, can have significant damping effects on the flavor transition pattern, and can partly erase the shock-wave imprint on the observable time spectra, especially for sin^2(theta_13) > O(10^-3). v2 (23 pages, including 6 eps figures). Typos removed, references updated, matches the published version |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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