Results from the T2K experiment on neutrino mixing including a new far detector $\mu$-like sample

Abstract

We have made improved measurements of three-flavor neutrino mixing with 19.7(16.3)$\times 10^{20}$ protons on target in (anti-)neutrino-enhanced beam modes. A new sample of muon-neutrino events with tagged pions has been added at the far detector, as well as new proton and photon-tagged samples at the near detector. Significant improvements have been made to the flux and neutrino interaction modeling. T2K data continue to prefer the normal mass ordering and upper octant of ${\sin }^2{\theta }_{23}$ with a near-maximal value of the charge-parity violating phase with best-fit values in the normal ordering of ${\delta }_{\mathrm{CP}}=-2.18\begin{array}{c}+1.22\\ -0.47\end{array}$, ${\sin }^2{\theta }_{23}=0.559\begin{array}{c}+0.018\\ -0.078\end{array}$ and $\Delta m_{32}^2=(+2.506\begin{array}{c}+0.039\\ -0.052\end{array})\times 10^{-3}$ eV${}^2$.

Version accepted for publication by PRL

References in corpus (11)

• An Improved Measurement of Neutrino Oscillation Parameters by the NOvA Experiment
• Improved measurements of the neutrino mixing angle ${\theta }_{13}$ with the Double Chooz detector
• Measurement of neutrino and antineutrino oscillations by the T2K experiment including a new additional sample of ${\nu }_e$ interactions at the far detector
• Measurement of Neutrino-Induced Charged-Current Charged Pion Production Cross Sections on Mineral Oil at E${}_{\nu }\sim 1\text{GeV}$
• Measurements of neutrino oscillation parameters from the T2K experiment using $3.6\times 10^{21}$ protons on target
• The NEUT Neutrino Interaction Simulation
• Reanalysis of bubble chamber measurements of muon-neutrino induced single pion production
• Improving the accuracy of neutrino energy reconstruction in charged-current quasielastic scattering off nuclear targets
• Using world charged pion--nucleus scattering data to constrain an intranuclear cascade model
• Inclusive and pion production neutrino-nucleus cross sections
• Parametrized uncertainties in the spectral function model of neutrino charged-current quasielastic interactions for oscillation analyses