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Search for CP violation in neutrino and antineutrino oscillations by the T2K experiment with 2.2×1021 protons on target
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T2K Collaboration (Including: Barker, Gary John, Boyd, Steve B., Chappell, A., Denner, P. F., Hadley, David R., Haigh, J. T. and Knight, A.). (2018) Search for CP violation in neutrino and antineutrino oscillations by the T2K experiment with 2.2×1021 protons on target. Physical Review Letters, 121 (17). 171802. doi:10.1103/PhysRevLett.121.171802 ISSN 0031-9007.
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Official URL: http://dx.doi.org/10.1103/PhysRevLett.121.171802
Abstract
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)×1020 protons on target in the neutrino (antineutrino) mode, 89 νe candidates and seven anti-νe candidates are observed, while 67.5 and 9.0 are expected for δCP=0 and normal mass ordering. The obtained 2σ confidence interval for the CP-violating phase, δCP, does not include the CP-conserving cases (δCP=0, π). The best-fit values of other parameters are sin2θ23=0.526+0.032−0.036 and Δm232=2.463+0.071−0.070×10−3 eV2/c4.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | Physical Review Letters | ||||
Publisher: | American Physical Society | ||||
ISSN: | 0031-9007 | ||||
Official Date: | 26 October 2018 | ||||
Dates: |
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Volume: | 121 | ||||
Number: | 17 | ||||
Article Number: | 171802 | ||||
DOI: | 10.1103/PhysRevLett.121.171802 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Open Access (Creative Commons) |
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