Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-02-11
Phys.Rev.Lett.101:171801,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
Final version: Text clarified, references updated. Matches the version published in Physical Review Letters
Scientific paper
10.1103/PhysRevLett.101.171801
Collective neutrino flavor transformations deep inside a supernova are sensitive to the neutrino mass hierarchy even at extremely small values of theta(13). Exploiting this effect, we show that comparison of the antineutrino signals from a galactic supernova in two megaton class water Cherenkov detectors, one of which is shadowed by the Earth, will enable us to distinguish between the hierarchies if sin^2 theta(13) < 10^{-5}. On the other hand, the observation of Earth effects in the inverted hierarchy for sin^2 theta(13) > 10^{-3} will provide a robust observable signature of collective oscillations occurring deep inside the supernova.
Dasgupta Basudeb
Dighe Amol
Mirizzi Alessandro
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