First combined analysis of neutrino and antineutrino oscillations at T2K
First combined analysis of neutrino and antineutrino oscillations at T2K
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DOI:
10.1103/physrevlett.118.151801
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发表时间:
2017-01
期刊:
影响因子:
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通讯作者:
K. Abe;J. Amey;C. Andreopoulos;M. Antonova;S. Aoki;A. Ariga;D. Autiero;S. Ban;M. Barbi
中科院分区:
文献类型:
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作者:
K. Abe;J. Amey;C. Andreopoulos;M. Antonova;S. Aoki;A. Ariga;D. Autiero;S. Ban;M. Barbi
T2K reports its first results in the search for CP violation in neutrino oscillations using appearance and disappearance channels for neutrino- and antineutrino-mode beam. The data include all runs from Jan 2010 to May 2016 and comprise $7.482\times10^{20}$,protons on target in neutrino mode, which yielded in the far detector 32 e-like and 135 $\mu$-like events, and $7.471\times10^{20}$,protons on target in antineutrino mode which yielded 4 e-like and 66 $\mu$-like events. Reactor measurements of $\sin^{2}2\theta_{13}$ have been used as an additional constraint. The one-dimensional confidence interval at 90% for $\delta_{CP}$ spans the range ($-3.13$, $-0.39$) for normal mass ordering. The CP conservation hypothesis ($\delta_{CP}=0,\pi$) is excluded at 90% C.L.