PT Journal
AU T2K Collaboration (Abe, Kea
   Antonova, M
   Cervera-Villanueva, A
   Fernandez, P
   Izmaylov, A
   Novella, P
TI Search for CP Violation in Neutrino and Antineutrino Oscillations by the T2K Experiment with 2.2 x 10(21) Protons on Target
SO Physical Review Letters
JI Phys. Rev. Lett.
PY 2018
BP 171802
EP 9pp
VL 121
IS 17
DI 10.1103/PhysRevLett.121.171802
LA English
AB The T2K experiment measures muon neutrino disappearance and electron neutrino appearance in accelerator-produced neutrino and antineutrino beams. With an exposure of 14.7(7.6) x 10(20) protons on target in the neutrino (antineutrino) mode, 89 nu(e) candidates and seven anti-nu(e) candidates are observed, while 67.5 and 9.0 are expected for delta(CP) = 0 and normal mass ordering. The obtained 2 sigma confidence interval for the CP-violating phase, delta(CP), does not include the CP-conserving cases (delta(CP) = 0, pi). The best-fit values of other parameters are sin(2) theta(23) = 0.526(-0.036)(+0.032) and Delta m(32)(2) = 2.463(-0.070)(+0.071) x 10(-3) eV(2)/c(4).
ER