Determining neutrino mass hierarchy from electron disappearance at a low energy neutrino factory

Dutta, R and Sinha, N and Raut, S K (2014) Determining neutrino mass hierarchy from electron disappearance at a low energy neutrino factory. Physical Review D, 89 (7). ISSN 1550-7998

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Abstract

Recent measurements of large 13 by the reactor experiments have opened up the possibility of determining the neutrino mass hierarchy, i.e., the sign of the mass squared splitting Î"m312, the CP-violating phase CP, and the octant of 23. In light of this result, we study the performance of a low energy neutrino factory (LENF) for determination of the mass hierarchy. In particular, we explore the potential of the and ̄e disappearance channels at LENF to determine the neutrino mass hierarchy, that is free from the uncertainties arising from the unknown CP phase and the 23 octant. We find that using these electron neutrino (antineutrino) disappearance channels with a standard LENF, it is possible to exclude the wrong hierarchy at 5Ï with only 2 years of running, with a muon beam energy above 3.5(5.0-10.0) GeV and baseline longer than 1400(1900-2400) km for an optimistic (conservative) systematic error of 2% (5%).

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