Neutrino oscillation physics potential of the T2K experiment

Abe, K, Adam, J, Aihara, H, Akiri, T, Andreopoulos, C ORCID: 0000-0003-2020-8215, Aoki, S, Ariga, A, Assylbekov, S, Autiero, D, Barbi, M
et al (show 335 more authors) (2015) Neutrino oscillation physics potential of the T2K experiment. PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS, 2015 (4). 0-1.

[thumbnail of 1409.7469v2.pdf] Text
1409.7469v2.pdf - Unspecified

Download (4MB)
[thumbnail of licence] Text (licence)
repository-policy-2016-03-31.pdf - Unspecified
Access to this file is embargoed until Unspecified.

Download (77kB)


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.

Item Type: Article
Additional Information: 40 pages, 27 figures, accepted by PTEP
Uncontrolled Keywords: hep-ex, hep-ex
Depositing User: Symplectic Admin
Date Deposited: 05 Apr 2016 10:10
Last Modified: 16 Dec 2022 14:56
DOI: 10.1093/ptep/ptv031
Related URLs: