Combined Analysis of Neutrino and Antineutrino Oscillations at T2K

The T2K Collaboration

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T2K reports its first results in the search for CP violation in neutrino oscillations using appearance and disappearance channels for neutrino- and antineutrino-mode beams. The data include all runs from January 2010 to May 2016 and comprise 7.482×1020 protons on target in neutrino mode, which yielded in the far detector 32 e-like and 135 μ-like events, and 7.471×1020 protons on target in antineutrino mode, which yielded 4 e-like and 66 μ-like events. Reactor measurements of sin22θ13 have been used as an additional constraint. The one-dimensional confidence interval at 90% for the phase δCP spans the range (−3.13
, −0.39) for normal mass ordering. The CP conservation hypothesis (δCP=0, π
) is excluded at 90% C.L.
Original languageEnglish
Article number151801
Pages (from-to)151801-1-151801-9
JournalPhysical Review Letters
Issue number15
Early online date10 Apr 2017
Publication statusPublished - 14 Apr 2017


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