Blog
About

  • Record: found
  • Abstract: found
  • Article: found
Is Open Access

Neutrino Oscillation Physics Potential of the T2K Experiment

Preprint

Read this article at

Bookmark
      There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

      Abstract

      The observation of the recent electron neutrino appearance in a muon neutrino beam and the high-precision measurement of the mixing angle \(\theta_{13}\) have led to a re-evaluation of the physics potential of the T2K long-baseline neutrino oscillation experiment. Sensitivities are explored for CP violation in neutrinos, non-maximal \(\sin^22\theta_{23}\), the octant of \(\theta_{23}\), and the mass hierarchy, in addition to the measurements of \(\delta_{CP}\), \(\sin^2\theta_{23}\), and \(\Delta m^2_{32}\), for various combinations of \(\nu\)-mode and \(\bar{\nu}\)-mode data-taking. With an exposure of \(7.8\times10^{21}\)~protons-on-target, T2K can achieve 1-\(\sigma\) resolution of 0.050(0.054) on \(\sin^2\theta_{23}\) and \(0.040(0.045)\times10^{-3}~\rm{eV}^2\) on \(\Delta m^2_{32}\) for 100%(50%) neutrino beam mode running assuming \(\sin^2\theta_{23}=0.5\) and \(\Delta m^2_{32} = 2.4\times10^{-3}\) eV\(^2\). T2K will have sensitivity to the CP-violating phase \(\delta_{\rm{CP}}\) at 90% C.L. or better over a significant range. For example, if \(\sin^22\theta_{23}\) is maximal (i.e \(\theta_{23}\)=\(45^\circ\)) the range is \(-115^\circ<\delta_{\rm{CP}}<-60^\circ\) for normal hierarchy and \(+50^\circ<\delta_{\rm{CP}}<+130^\circ\) for inverted hierarchy. When T2K data is combined with data from the NO\(\nu\)A experiment, the region of oscillation parameter space where there is sensitivity to observe a non-zero \(\delta_{CP}\) is substantially increased compared to if each experiment is analyzed alone.

      Related collections

      Author and article information

      Journal
      1409.7469

      High energy & Particle physics

      Comments

      Comment on this article