3 years ago

Probing the neutrino mass ordering with KM3NeT-ORCA: analysis and perspectives

The discrimination of the two possible options for the neutrino mass ordering (normal or inverted) is a major goal for current and future neutrino oscillation experiments. Such a goal might be reached by observing high-statistics energy-angle spectra of events induced by atmospheric neutrinos and antineutrinos propagating in the Earth matter. Large volume water-Cherenkov detectors envisaged to this purpose include the so-called KM3NeT-ORCA project (in seawater) and the IceCube-PINGU project (in ice). Building upon a previous work focused on PINGU, we study in detail the effects of various systematic uncertainties on the ORCA sensitivity to the mass ordering, for the reference configuration with 9 m vertical spacing. We point out the need to control spectral shape uncertainties at the percent level, the effects of better priors on the ##IMG## [http://ej.iop.org/images/0954-3899/45/2/024003/jpgaa9503ieqn1.gif] {${\theta }_{23}$} mixing parameter, and the bene...

Publisher URL: http://iopscience.iop.org/0954-3899/45/2/024003

DOI: 10.1088/1361-6471/aa9503

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