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arXiv · 0802.1481

Identifying neutrino mass hierarchy at extremely small theta(13) through Earth matter effects in a supernova signal

Basudeb Dasgupta·Amol Dighe·Alessandro Mirizzi
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Abstract

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.

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Basudeb Dasgupta, Amol Dighe, Alessandro Mirizzi. 2008-10-20. Identifying neutrino mass hierarchy at extremely small theta(13) through Earth matter effects in a supernova signal. https://doi.org/10.1103/physrevlett.101.171801

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