Results

First combined analysis of neutrino and antineutrino oscillations at T2K

February 11, 2017

This data release pertains to this paper.

The tar file for this data release includes a README document
as well as a ROOT file with the $-2 \Delta \ln \mathcal{L}$ distributions of
$\sin^2 \theta_{23}$ Vs $\Delta m^2_{32}$ ($\theta_{13}$ constrained with the PDG2015 global fit result),
$\sin^2 \theta_{13}$ Vs $\delta_{CP}$ (T2K only data) and
$\delta_{CP}$ and mass ordering ($\theta_{13}$ constrained with the PDG2015 global fit result),
Also the contours that define the 68\% and 90\% confidence regions of
$\sin^2 \theta_{23}$ Vs $\Delta m^2_{32}$ and
$\sin^2 \theta_{13}$ Vs $\delta_{CP}$ are provided.

The data files are contained in this tarball: T2KJointNuNuBarOscillation_Run17c_2016 .

Neutrino beam flux prediction 2016

October 5, 2016

The files in the following archive file contain the neutrino and antineutrino beam flux predictions for the T2K ND280 (near) and Super-Kamiokande (far) detectors. It supersedes the previous flux release in 2013.
The original description of the flux predictions is published in this paper. Since the publication, the flux prediction has been updated with new thin target data from the NA61/SHINE experiment, and flux predictions for antineutrino enhanced beam operation have been produced. The NA61/SHINE thin target measurements of π±, K±, KS0, Λ and p production are published in Eur. Phys. J. C (2016) 76:84. The updated flux prediction is described in Phys. Rev. D 91, 072010 (2015).

The provided flux predictions include no neutrino oscillations.

This tar file contains the flux predictions as well as a README.pdf file with detailed information on the included files:
T2K flux prediction 2016

 

 

First Measurement of the Muon Neutrino Charged Current Single Pion Production Cross Section on Water with the T2K Near Detector

May 26, 2016

These data pertain to this paper.

The tar file for this data release includes a README document in PDF format and various csv files containing pion and muon kinematics as well as a ROOT file with the differential cross-section results and the muon neutrino flux histogram for T2K Run I-IV.
First Measurement of the Muon Neutrino Charged Current Single Pion Production Cross Section on Water with the T2K Near Detector

Measurement of Muon Antineutrino Oscillations with an Accelerator-Produced Off-Axis Beam

May 12, 2016

This data release pertains to this paper.

The tar file for this data release includes a README document in PDF format, and a ROOT file.
The ROOT file contains the best-fit points in the sin223)-Δm2 space, the 2D χ2 surface, 68% and 90% 2D confidence level contours, and 1D χ2 surfaces for both sin223) and Δm2.
All results are given for both normal and inverted hierarchy.
Measurement of Muon Antineutrino Oscillations with an Accelerator-Produced Off-Axis Beam

Measurement of double-differential muon neutrino charged-current interactions on C8H8 without pions in the final state using the T2K off-axis beam

February 17, 2016

These data pertain to this paper.

The tar file for this data release includes a README document in PDF format and various txt files containing the measured energy dependent CC0pi cross section and the covariance matrices for the two analyses presented in the paper. The results are presented in bins of muon momentum for separate muon angular ranges. The covariance matrices are provided separately for statistical uncertainties, systematic uncertainties and flux normalization uncertainty.
Measurement of double-differential muon neutrino charged-current interactions on C8H8 without pions in the final state using the T2K off-axis beam

Measurement of the νμ CCQE cross section on carbon with the ND280 detector at T2K

May 27, 2015

This data release pertains to the paper this paper.

The tar file for this data release includes a README document in PDF format and 2 csv files containing the measured energy dependent CCQE cross section and the covariance matrix describing the fractional uncertainty on these data. The README file gives information on how to interpret the numbers within the CSV file.
Measurement of the νμ CCQE cross section on carbon with the ND280 detector at T2K

Measurement of the νμ charged current quasi-elastic cross-section on carbon with the T2K on-axis neutrino beam

March 27, 2015

This data release pertains to this paper. The tar file for this data release includes a README document in PDF format and 3 ROOT files.

The ROOT files contain the neutrino flux information, the selection efficiency and nominal distribution information, and the systematic error covariance of the cross section results.
Measurement of the νμ charged current quasi-elastic cross-section on carbon with the T2K on-axis neutrino beam

Search for short baseline νe disappearance with the T2K near detector

November 11, 2014

This data release pertains to this paper. The tar file for this data release includes a README document in PDF format and a file .dat with the best-fit χ2 in the global minimum and the Δχ2 for each point of the grid Δm2eff versus sin2ee with the respect to the global minimum.
Search for short baseline νe disappearance with the T2K near detector

Measurement of the Inclusive Electron Neutrino Charged Current Cross Section on Carbon with the T2K Near Detector

July 30, 2014

This data release pertains to this paper. The tar file for this data release includes a README document in PDF format, a ROOT file, and 7 CSV text files of the results.

The ROOT file contains the electron neutrino flux as a function of neutrino energy, and cross-section results as a function of electron momentum, electron scattering angle and Q-squared for both the full phase-space and reduced phase-space (momentum > 550 MeV and cos(θ) > 0.72) analyses. Each cross-section result contains the differential cross-section with total uncertainty in each bin, the total uncertainty covariance matrix, the statistical uncertainty covariance matrix and the flux uncertainty covariance matrix. The CSV files contain the same information as the ROOT file, but in text format.
Measurement of the Inclusive Electron Neutrino Charged Current Cross Section on Carbon

νμ disappearance measurement results 2014

March 26, 2014

This data release pertains to this paper.
The tar file for this data release includes a README document in PDF format, a ROOT file, and a plain text table of the analysis results. The ROOT file contains the best-fit points for sin223) vs. Δm2, the 2D log likelihood surface, 68% and 90% 2D Feldman-Cousins contours, and 1D profiled likelihood in. All results sin223) vs. Δm2 are given for both normal and inverted hierarchy. The text file contains the same information in plain text format.
T2K νμ disappearance results 2014