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Title: Search for C P Violation in Neutrino and Antineutrino Oscillations by the T2K Experiment with 2.2 × 10 21 Protons on Target

Journal Article · · Physical Review Letters
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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 ) × 10 20 protons on target in the neutrino (antineutrino) mode, 89 ν e candidates and seven anti- ν e candidates are observed, while 67.5 and 9.0 are expected for δ C P = 0 and normal mass ordering. The obtained 2 σ confidence interval for the C P -violating phase, δ C P , does not include the C P -conserving cases ( δ C P = 0 , π ). The best-fit values of other parameters are sin 2 θ 23 = 0.52 6 - 0.036 + 0.032 and Δ m 32 2 = 2.463 - 0.070 + 0.071 × 10 - 3 eV 2 / c 4 .

Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
Contributing Organization:
T2K Collaboration
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1478682
Alternate ID(s):
OSTI ID: 1490158
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Vol. 121 Journal Issue: 17; ISSN 0031-9007
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 140 works
Citation information provided by
Web of Science

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T2K neutrino flux prediction journal January 2013
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Measurements of $$\pi ^{\pm }$$ π ± , $$K^{\pm }$$ K ± , $$K^0_S$$ K S 0 , $$\varLambda $$ Λ and proton production in proton–carbon interactions at 31 GeV/c with the NA61/SHINE spectrometer at the CERN SPS journal February 2016
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The T2K experiment
  • Abe, K.; Abgrall, N.; Aihara, H.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 659, Issue 1 https://doi.org/10.1016/j.nima.2011.06.067
journal December 2011
Measurement of neutrino and antineutrino oscillations by the T2K experiment including a new additional sample of ν e interactions at the far detector journal November 2017
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The Super-Kamiokande detector
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journal April 2003
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Inclusive charged-current neutrino-nucleus reactions journal April 2011
Inclusive quasielastic charged-current neutrino-nucleus reactions journal November 2004
Combined Analysis of Neutrino and Antineutrino Oscillations at T2K journal April 2017
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Reanalysis of bubble chamber measurements of muon-neutrino induced single pion production journal December 2014
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Measurement of electron antineutrino oscillation based on 1230 days of operation of the Daya Bay experiment journal April 2017
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Cited By (26)

Neutrino-excitation of baryon resonances and single pion production journal April 1981
Incorporating systematic uncertainties into an upper limit
  • Cousins, Robert D.; Highland, Virgil L.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 320, Issue 1-2 https://doi.org/10.1016/0168-9002(92)90794-5
journal August 1992
Resonance amplification and T-violation effects in three-neutrino oscillations in the earth journal April 1988
Coherent π0 production in neutrino reactions journal August 1983
The T2K experiment
  • Abe, K.; Abgrall, N.; Aihara, H.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 659, Issue 1 https://doi.org/10.1016/j.nima.2011.06.067
journal December 2011
Theoretical uncertainties on quasielastic charged-current neutrino–nucleus cross sections journal July 2006
Review of Particle Physics journal October 2016
Monte Carlo sampling methods using Markov chains and their applications journal April 1970
Unified approach to the classical statistical analysis of small signals journal April 1998
Measurements of $$\pi ^{\pm }$$ π ± , $$K^{\pm }$$ K ± , $$K^0_S$$ K S 0 , $$\varLambda $$ Λ and proton production in proton–carbon interactions at 31 GeV/c with the NA61/SHINE spectrometer at the CERN SPS journal February 2016
Constraining the GENIE model of neutrino-induced single pion production using reanalyzed bubble chamber data journal August 2016
Search for CP Violation in Neutrino and Antineutrino Oscillations by the T2K Experiment with $2.2\times10^{21}$ Protons on Target text January 2018
Measurement of the muon neutrino charged-current cross sections on water, hydrocarbon and iron, and their ratios, with the T2K on-axis detectors journal September 2019
Combined sensitivity to the neutrino mass ordering with JUNO, the IceCube Upgrade, and PINGU journal February 2020
Search for Electron Antineutrino Appearance in a Long-Baseline Muon Antineutrino Beam journal April 2020
Search for light sterile neutrinos with the T2K far detector Super-Kamiokande at a baseline of 295 km text January 2019
Search for neutral-current induced single photon production at the ND280 near detector in T2K journal June 2019
Tests of discrete symmetries journal November 2019
Neutrino physics with the PTOLEMY project: active neutrino properties and the light sterile case journal July 2019
Constraint of the MINER ν A medium energy neutrino flux using neutrino-electron elastic scattering journal November 2019
Measurement of neutrino and antineutrino neutral-current quasielasticlike interactions on oxygen by detecting nuclear deexcitation γ rays journal December 2019
Hierarchy independent sensitivity to leptonic δ C P with atmospheric neutrinos journal December 2019
A 4 lepton flavor model and modulus stabilization from S 4 modular symmetry journal December 2019
Development of an analysis to probe the neutrino mass ordering with atmospheric neutrinos using three years of IceCube DeepCore data: IceCube Collaboration journal January 2020
Neutrino Oscillation Analysis of 217 Live Days of Daya Bay and 500 Live Days of RENO journal January 2020
Search for Electron Antineutrino Appearance in a Long-Baseline Muon Antineutrino Beam text January 2020

Figures / Tables (8)


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